Potential fix for pull request finding 'Missing Dispose call on local IDisposable'

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

.github/copilot-instructions.md

@@ -1,4 +1,5 @@
 # Copilot Instructions
 
 ## Project Guidelines
-- All new byte[xx] calls should use using var data = ArrayPool<byte>.Shared.Lease(xx); instead of directly allocating byte arrays
+- When running tests in this workspace, do not run tests for the net48 target framework.
+- When changing System.Text.Json code in this workspace, verify API availability for netstandard2.0 and netstandard2.1 instead of assuming newer APIs exist.

.github/instructions/instructions.md

@@ -0,0 +1,15 @@
+---
+description: 'Guidelines for this solution'
+applyTo: '**/*.csproj, **/*.cs'
+---
+
+# Multi .NET Framework Targeting
+
+## Instructions
+- The main project "WireMock.Net.Minimal" targets `netstandard2.0` and `net8.0`. Ensure that any new code or dependencies are compatible with these frameworks.
+
+
+# C# Guidelines
+
+## Instructions
+- When a new ByteArray is needed, do not use `var data = new byte[bufferSize];`. Always use `var data = ArrayPool<byte>.Shared.Lease(bufferSize);`.

CHANGELOG.md

@@ -1,3 +1,19 @@
+# 2.4.0 (24 April 2026)
+- [#1437](https://github.com/wiremock/WireMock.Net/pull/1437) - Added feature to enable and disable mappings [feature] contributed by [jayaraman-venkatesan](https://github.com/jayaraman-venkatesan)
+- [#1450](https://github.com/wiremock/WireMock.Net/pull/1450) - Bump OpenTelemetry.Exporter.OpenTelemetryProtocol from 1.14.0 to 1.15.x [dependencies, .NET] contributed by [dependabot[bot]](https://github.com/apps/dependabot)
+- [#1421](https://github.com/wiremock/WireMock.Net/issues/1421) - Deactivate mapping without deleting it [feature]
+
+# 2.3.0 (20 April 2026)
+- [#1436](https://github.com/wiremock/WireMock.Net/pull/1436) - Moving Scenario state change before global response delay is set [feature] contributed by [jayaraman-venkatesan](https://github.com/jayaraman-venkatesan)
+- [#1440](https://github.com/wiremock/WireMock.Net/pull/1440) - Bump log4net from 2.0.15 to 3.3.0 [dependencies] contributed by [dependabot[bot]](https://github.com/apps/dependabot)
+- [#1443](https://github.com/wiremock/WireMock.Net/pull/1443) - Fix ExactMatcher and JsonMatcher not working for ISO dates as string [bug] contributed by [StefH](https://github.com/StefH)
+- [#1444](https://github.com/wiremock/WireMock.Net/pull/1444) - Update instructions.md [refactor] contributed by [StefH](https://github.com/StefH)
+- [#1448](https://github.com/wiremock/WireMock.Net/pull/1448) - Use DefaultJsonSerializer for BodyAsJson-Response [bug] contributed by [StefH](https://github.com/StefH)
+- [#1205](https://github.com/wiremock/WireMock.Net/issues/1205) - System.Private.Uri 4.3.0 Blackduck security High vulnerability [bug]
+- [#1260](https://github.com/wiremock/WireMock.Net/issues/1260) - Scenario state change before a response delay timeout ends [bug]
+- [#1441](https://github.com/wiremock/WireMock.Net/issues/1441) - ExactMatcher and JsonMatcher not working for ISO dates in v2.2.0 [bug]
+- [#1446](https://github.com/wiremock/WireMock.Net/issues/1446) - WithBodyAsJson does not return correctly formatted json when using SystemTextJsonConverter [bug]
+
 # 2.2.0 (30 March 2026)
 - [#1433](https://github.com/wiremock/WireMock.Net/pull/1433) - Add comments for ScenarioStateStore related code [refactor] contributed by [StefH](https://github.com/StefH)
 - [#1434](https://github.com/wiremock/WireMock.Net/pull/1434) - Upgrade Scriban.Signed [security] contributed by [StefH](https://github.com/StefH)

Directory.Build.props

@@ -4,7 +4,7 @@
     </PropertyGroup>
 
     <PropertyGroup>
-        <VersionPrefix>2.2.0</VersionPrefix>
+        <VersionPrefix>2.4.0</VersionPrefix>
         <PackageIcon>WireMock.Net-Logo.png</PackageIcon>
         <PackageProjectUrl>https://github.com/wiremock/WireMock.Net</PackageProjectUrl>
         <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>

Generate-ReleaseNotes.cmd

@@ -1,6 +1,6 @@
 rem https://github.com/StefH/GitHubReleaseNotes
 
-SET version=2.2.0
+SET version=2.4.0
 
 GitHubReleaseNotes --output CHANGELOG.md --skip-empty-releases --exclude-labels wontfix test question invalid doc duplicate example environment --version %version% --token %GH_TOKEN%
 

PackageReleaseNotes.txt

@@ -1,5 +1,6 @@
-# 2.2.0 (30 March 2026)
+# 2.4.0 (24 April 2026)
-- #1433 Add comments for ScenarioStateStore related code [refactor]
+- #1437 Added feature to enable and disable mappings [feature]
-- #1434 Upgrade Scriban.Signed [security]
+- #1450 Bump OpenTelemetry.Exporter.OpenTelemetryProtocol from 1.14.0 to 1.15.x [dependencies, .NET]
+- #1421 Deactivate mapping without deleting it [feature]
 
 The full release notes can be found here: https://github.com/wiremock/WireMock.Net/blob/master/CHANGELOG.md

README.md

@@ -64,6 +64,7 @@ A C# .NET version based on [mock4net](https://github.com/alexvictoor/mock4net) w
 | | | |
 |   **WireMock.Net.Extensions.Routing** | [![NuGet Badge WireMock.Net.Extensions.Routing](https://img.shields.io/nuget/v/WireMock.Net.Extensions.Routing)](https://www.nuget.org/packages/WireMock.Net.Extensions.Routing) | [![MyGet Badge WireMock.Net.Extensions.Routing](https://img.shields.io/myget/wiremock-net/vpre/WireMock.Net.Extensions.Routing?includePreReleases=true&label=MyGet)](https://www.myget.org/feed/wiremock-net/package/nuget/WireMock.Net.Extensions.Routing)
 |   **WireMock.Net.Matchers.CSharpCode** | [![NuGet Badge WireMock.Net.Matchers.CSharpCode](https://img.shields.io/nuget/v/WireMock.Net.Matchers.CSharpCode)](https://www.nuget.org/packages/WireMock.Net.Matchers.CSharpCode) | [![MyGet Badge WireMock.Net.Matchers.CSharpCode](https://img.shields.io/myget/wiremock-net/vpre/WireMock.Net.Matchers.CSharpCode?includePreReleases=true&label=MyGet)](https://www.myget.org/feed/wiremock-net/package/nuget/WireMock.Net.Matchers.CSharpCode)
+|   **WireMock.Net.Matchers.SystemTextJsonPath** | [![NuGet Badge WireMock.Net.Matchers.SystemTextJsonPath](https://img.shields.io/nuget/v/WireMock.Net.Matchers.SystemTextJsonPath)](https://www.nuget.org/packages/WireMock.Net.Matchers.SystemTextJsonPath) | [![MyGet Badge WireMock.Net.Matchers.SystemTextJsonPath](https://img.shields.io/myget/wiremock-net/vpre/WireMock.Net.Matchers.SystemTextJsonPath?includePreReleases=true&label=MyGet)](https://www.myget.org/feed/wiremock-net/package/nuget/WireMock.Net.Matchers.SystemTextJsonPath)
 |   **WireMock.Net.OpenApiParser** | [![NuGet Badge WireMock.Net.OpenApiParser](https://img.shields.io/nuget/v/WireMock.Net.OpenApiParser)](https://www.nuget.org/packages/WireMock.Net.OpenApiParser) | [![MyGet Badge WireMock.Net.OpenApiParser](https://img.shields.io/myget/wiremock-net/vpre/WireMock.Net.OpenApiParser?includePreReleases=true&label=MyGet)](https://www.myget.org/feed/wiremock-net/package/nuget/WireMock.Net.OpenApiParser)
 |   **WireMock.Net.MimePart** | [![NuGet Badge WireMock.Net.MimePart](https://img.shields.io/nuget/v/WireMock.Net.MimePart)](https://www.nuget.org/packages/WireMock.Net.MimePart) | [![MyGet Badge WireMock.Net.MimePart](https://img.shields.io/myget/wiremock-net/vpre/WireMock.Net.MimePart?includePreReleases=true&label=MyGet)](https://www.myget.org/feed/wiremock-net/package/nuget/WireMock.Net.MimePart)
 |   **WireMock.Net.GraphQL** | [![NuGet Badge WireMock.Net.GraphQL](https://img.shields.io/nuget/v/WireMock.Net.GraphQL)](https://www.nuget.org/packages/WireMock.Net.GraphQL) | [![MyGet Badge WireMock.Net.GraphQL](https://img.shields.io/myget/wiremock-net/vpre/WireMock.Net.GraphQL?includePreReleases=true&label=MyGet)](https://www.myget.org/feed/wiremock-net/package/nuget/WireMock.Net.GraphQL)
@@ -76,7 +77,7 @@ A C# .NET version based on [mock4net](https://github.com/alexvictoor/mock4net) w
 
 <br />
 
-🔺 **WireMock.Net.Minimal** does not include *WireMock.Net.MimePart*, *WireMock.Net.GraphQL*, *WireMock.Net.ProtoBuf* and *WireMock.Net.OpenTelemetry*.
+🔺 **WireMock.Net.Minimal** does not include *WireMock.Net.MimePart*, *WireMock.Net.GraphQL*, *WireMock.Net.ProtoBuf*, *WireMock.Net.OpenTelemetry* and *WireMock.Net.Matchers.SystemTextJsonPath*.
 
 ---
 

WireMock.Net Solution.sln

@@ -1,4 +1,3 @@
-
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 18
 VisualStudioVersion = 18.0.11205.157
@@ -156,6 +155,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WireMock.Net.TestWebApplica
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WireMock.Net.RestClient.AwesomeAssertions", "src\WireMock.Net.RestClient.AwesomeAssertions\WireMock.Net.RestClient.AwesomeAssertions.csproj", "{F4B2B967-98D7-4D93-9A5C-5EF7B84B941A}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WireMock.Net.Matchers.SystemTextJsonPath", "src\WireMock.Net.Matchers.SystemTextJsonPath\WireMock.Net.Matchers.SystemTextJsonPath.csproj", "{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -850,6 +851,18 @@ Global
 		{F4B2B967-98D7-4D93-9A5C-5EF7B84B941A}.Release|x64.Build.0 = Release|Any CPU
 		{F4B2B967-98D7-4D93-9A5C-5EF7B84B941A}.Release|x86.ActiveCfg = Release|Any CPU
 		{F4B2B967-98D7-4D93-9A5C-5EF7B84B941A}.Release|x86.Build.0 = Release|Any CPU
+		{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Debug|x64.Build.0 = Debug|Any CPU
+		{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Debug|x86.Build.0 = Debug|Any CPU
+		{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Release|Any CPU.Build.0 = Release|Any CPU
+		{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Release|x64.ActiveCfg = Release|Any CPU
+		{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Release|x64.Build.0 = Release|Any CPU
+		{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Release|x86.ActiveCfg = Release|Any CPU
+		{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -914,6 +927,7 @@ Global
 		{2CE8E3A6-59CC-FE9C-9399-AD54E1FA862B} = {985E0ADB-D4B4-473A-AA40-567E279B7946}
 		{3B05CC76-C3CB-8667-6B65-3129DFB25681} = {0BB8B634-407A-4610-A91F-11586990767A}
 		{F4B2B967-98D7-4D93-9A5C-5EF7B84B941A} = {8F890C6F-9ACC-438D-928A-AD61CDA862F2}
+		{A1B2C3D4-E5F6-7890-ABCD-EF1234567890} = {8F890C6F-9ACC-438D-928A-AD61CDA862F2}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {DC539027-9852-430C-B19F-FD035D018458}

examples-Aspire/AspireApp1.ServiceDefaults/AspireApp1.ServiceDefaults.csproj

@@ -12,11 +12,11 @@
 
     <PackageReference Include="Microsoft.Extensions.Http.Resilience" Version="8.4.0" />
     <PackageReference Include="Microsoft.Extensions.ServiceDiscovery" Version="8.0.0" />
-    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.8.1" />
+    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.15.3" />
-    <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.8.1" />
+    <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.15.3" />
-    <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.8.1" />
+    <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.15.2" />
-    <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.8.1" />
+    <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.15.1" />
-    <PackageReference Include="OpenTelemetry.Instrumentation.Runtime" Version="1.8.0" />
+    <PackageReference Include="OpenTelemetry.Instrumentation.Runtime" Version="1.15.1" />
   </ItemGroup>
 
 </Project>

examples/WireMock.Net.Console.MimePart/WireMock.Net.Console.MimePart.csproj

@@ -16,7 +16,7 @@
 
     <ItemGroup>
         <ProjectReference Include="..\..\src\WireMock.Net\WireMock.Net.csproj" />
-        <PackageReference Include="log4net" Version="2.0.15" />
+        <PackageReference Include="log4net" Version="3.3.0" />
         <PackageReference Include="Microsoft.Extensions.Configuration" Version="8.0.0" />
     </ItemGroup>
 

examples/WireMock.Net.Console.NET8/WireMock.Net.Console.NET8.csproj

@@ -18,7 +18,7 @@
 
     <ItemGroup>
         <ProjectReference Include="..\..\src\WireMock.Net\WireMock.Net.csproj" />
-        <PackageReference Include="log4net" Version="2.0.15" />
+        <PackageReference Include="log4net" Version="3.3.0" />
         <PackageReference Include="Microsoft.Extensions.Configuration" Version="8.0.0" />
     </ItemGroup>
 

examples/WireMock.Net.OpenTelemetryDemo/WireMock.Net.OpenTelemetryDemo.csproj

@@ -8,9 +8,9 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="OpenTelemetry.Exporter.Console" Version="1.14.0" />
+        <PackageReference Include="OpenTelemetry.Exporter.Console" Version="1.15.3" />
-        <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.14.0" />
+        <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.15.1" />
-        <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.14.0" />
+        <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.15.3" />
     </ItemGroup>
 
     <ItemGroup>

examples/WireMock.Net.Service/packages.config

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="log4net" version="2.0.15" targetFramework="net48" />
+  <package id="log4net" version="3.3.0" targetFramework="net48" />
   <package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net452" />
   <package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net452" />
   <package id="Microsoft.AspNet.WebApi.Owin" version="5.2.3" targetFramework="net452" />

examples/WireMock.Net.WebApplication.IIS/App.cs

@@ -1,29 +1,18 @@
 // Copyright © WireMock.Net
 
-using Microsoft.Extensions.Hosting;
-using System.Threading;
-using System.Threading.Tasks;
-
 namespace WireMock.Net.WebApplication;
 
-public class App : IHostedService
+public class App(IWireMockService service) : IHostedService
 {
-    private readonly IWireMockService _service;
-        
-    public App(IWireMockService service)
-    {
-        _service = service;
-    }
-
     public Task StartAsync(CancellationToken cancellationToken)
     {
-        _service.Start();
+        service.Start();
         return Task.CompletedTask;
     }
 
     public Task StopAsync(CancellationToken cancellationToken)
     {
-        _service.Stop();
+        service.Stop();
         return Task.CompletedTask;
     }
 }

examples/WireMock.Net.WebApplication.IIS/Program.cs

@@ -1,9 +1,5 @@
 // Copyright © WireMock.Net
 
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.Logging;
 using WireMock.Settings;
 
 namespace WireMock.Net.WebApplication;

examples/WireMock.Net.WebApplication.IIS/WireMock.Net.WebApplication.IIS.csproj

@@ -15,7 +15,6 @@
     </ItemGroup>
 
     <ItemGroup>
-        <ProjectReference Include="..\..\src\WireMock.Net.Abstractions\WireMock.Net.Abstractions.csproj" />
         <ProjectReference Include="..\..\src\WireMock.Net\WireMock.Net.csproj" />
     </ItemGroup>
 

examples/WireMock.Net.WebApplication.IIS/WireMockService.cs

@@ -1,7 +1,5 @@
 // Copyright © WireMock.Net
 
-using System;
-using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using Newtonsoft.Json;
 using WireMock.Admin.Requests;

examples/WireMock.Net.WebApplication.IIS/appsettings.json

@@ -15,7 +15,7 @@
     "WireMockServerSettings": {
         "StartAdminInterface": true,
         "Urls": [
-            "http://localhost"
+            "http://localhost:0"
         ]
     }
 }

examples/WireMock.Net.WebApplication.IIS/web.config

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <!--
     Configure your application settings in appsettings.json. Learn more at http://go.microsoft.com/fwlink/?LinkId=786380
@@ -7,6 +7,11 @@
         <handlers>
             <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" resourceType="Unspecified" />
         </handlers>
+        <httpProtocol>
+            <customHeaders>
+                <add name="X-Frame-Options" value="SAMEORIGIN" />
+            </customHeaders>
+        </httpProtocol>
         <aspNetCore processPath="%LAUNCHER_PATH%" arguments="%LAUNCHER_ARGS%" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" forwardWindowsAuthToken="false" />
     </system.webServer>
 </configuration>

src/WireMock.Net.Abstractions/Admin/Mappings/MappingModel.cs

@@ -61,6 +61,11 @@ public class MappingModel
     /// </summary>
     public int? TimesInSameState { get; set; }
 
+    /// <summary>
+    /// Value to determine if the mapping is disabled. Defaults to <c>null</c> (not disabled).
+    /// </summary>
+    public bool? IsDisabled { get; set; }
+
     /// <summary>
     /// The request model.
     /// </summary>

src/WireMock.Net.Abstractions/Admin/Mappings/RequestModel.cs

@@ -1,5 +1,7 @@
 // Copyright © WireMock.Net
 
+using WireMock.Matchers.Request;
+
 namespace WireMock.Admin.Mappings;
 
 /// <summary>
@@ -66,4 +68,10 @@ public class RequestModel
     /// Gets or sets the body.
     /// </summary>
     public BodyModel? Body { get; set; }
+
+    /// <summary>
+    /// Type of the request matcher to return an immediate mismatch during mapping processing.
+    /// Optional.
+    /// </summary>
+    public RequestMatcherType? EarlyMatcherType { get; set; }
 }

src/WireMock.Net.Abstractions/Matchers/Request/IRequestMatcher.cs

@@ -7,6 +7,11 @@ namespace WireMock.Matchers.Request;
 /// </summary>
 public interface IRequestMatcher
 {
+    /// <summary>
+    /// Gets the request matcher's type.
+    /// </summary>
+    public RequestMatcherType Type { get; }
+
     /// <summary>
     /// Determines whether the specified RequestMessage is match.
     /// </summary>

src/WireMock.Net.Abstractions/Matchers/Request/RequestMatcherType.cs

@@ -0,0 +1,84 @@
+// Copyright © WireMock.Net
+
+namespace WireMock.Matchers.Request;
+
+/// <summary>
+/// List of predefined request matcher types.
+/// </summary>
+public enum RequestMatcherType
+{
+    /// <summary>
+    /// RequestMessageBodyMatcher
+    /// </summary>
+    Body = 0,
+
+    /// <summary>
+    /// RequestMessageBodyMatcher{T}
+    /// </summary>
+    BodyOfT = 1,
+
+    /// <summary>
+    /// RequestMessageClientIPMatcher
+    /// </summary>
+    ClientIP = 2,
+
+    /// <summary>
+    /// RequestMessageCookieMatcher
+    /// </summary>
+    Cookie = 3,
+
+    /// <summary>
+    /// RequestMessageGraphQLMatcher
+    /// </summary>
+    GraphQL = 4,
+
+    /// <summary>
+    /// RequestMessageHeaderMatcher
+    /// </summary>
+    Header = 5,
+
+    /// <summary>
+    /// RequestMessageHttpVersionMatcher
+    /// </summary>
+    HttpVersion = 6,
+
+    /// <summary>
+    /// RequestMessageMethodMatcher
+    /// </summary>
+    Method = 7,
+
+    /// <summary>
+    /// RequestMessageMultiPartMatcher
+    /// </summary>
+    MultiPart = 8,
+
+    /// <summary>
+    /// RequestMessageParamMatcher
+    /// </summary>
+    Param = 9,
+
+    /// <summary>
+    /// RequestMessagePathMatcher
+    /// </summary>
+    Path = 10,
+
+    /// <summary>
+    /// RequestMessageProtoBufMatcher
+    /// </summary>
+    ProtoBuf = 11,
+
+    /// <summary>
+    /// RequestMessageScenarioAndStateMatcher
+    /// </summary>
+    ScenarioAndState = 12,
+
+    /// <summary>
+    /// RequestMessageUrlMatcher
+    /// </summary>
+    Url = 13,
+
+    /// <summary>
+    /// RequestMessageCompositeMatcher
+    /// </summary>
+    Composite = 14
+}

src/WireMock.Net.AwesomeAssertions/Assertions/WireMockAssertions.WithBody.cs

@@ -31,19 +31,19 @@ public partial class WireMockAssertions
     }
 
     [CustomAssertion]
-    public AndConstraint<WireMockAssertions> WithBodyAsJson(object body, string because = "", params object[] becauseArgs)
+    public AndConstraint<WireMockAssertions> WithBodyAsJson(object body, IJsonMatcher? jsonMatcher = null, string because = "", params object[] becauseArgs)
     {
-        return WithBodyAsJson(new JsonMatcher(body), because, becauseArgs);
+        return WithBodyAsJson(jsonMatcher ?? new JsonMatcher(body), because, becauseArgs);
     }
 
     [CustomAssertion]
-    public AndConstraint<WireMockAssertions> WithBodyAsJson(string body, string because = "", params object[] becauseArgs)
+    public AndConstraint<WireMockAssertions> WithBodyAsJson(string body, IJsonMatcher? jsonMatcher = null, string because = "", params object[] becauseArgs)
     {
-        return WithBodyAsJson(new JsonMatcher(body), because, becauseArgs);
+        return WithBodyAsJson(jsonMatcher ?? new JsonMatcher(body), because, becauseArgs);
     }
 
     [CustomAssertion]
-    public AndConstraint<WireMockAssertions> WithBodyAsJson(IObjectMatcher matcher, string because = "", params object[] becauseArgs)
+    public AndConstraint<WireMockAssertions> WithBodyAsJson(IJsonMatcher matcher, string because = "", params object[] becauseArgs)
     {
         var (filter, condition) = BuildFilterAndCondition(r => r.BodyAsJson, matcher);
 
@@ -126,15 +126,44 @@ public partial class WireMockAssertions
 
     private static string? FormatBody(object? body)
     {
-        return body switch
+        if (body == null)
         {
-            null => null,
+            return null;
-            string str => str,
+        }
-            AnyOf<string, StringPattern>[] stringPatterns => FormatBodies(stringPatterns.Select(p => p.GetPattern())),
+
-            byte[] bytes => $"byte[{bytes.Length}] {{...}}",
+        if (body is string str)
-            JToken jToken => jToken.ToString(Formatting.None),
+        {
-            _ => JToken.FromObject(body).ToString(Formatting.None)
+            return str;
-        };
+        }
+
+        if (body is AnyOf<string, StringPattern>[] stringPatterns)
+        {
+            return FormatBodies(stringPatterns.Select(p => p.GetPattern()));
+        }
+
+        if (body is byte[] bytes)
+        {
+            return $"byte[{bytes.Length}] {{...}}";
+        }
+
+        if (body is JToken jToken)
+        {
+            return jToken.ToString(Formatting.None);
+        }
+
+        // System.IO.FileNotFoundException : Could not load file or assembly 'System.Text.Json, Version=10.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified.
+        var typeName = body.GetType().FullName;
+        if (typeName == "System.Text.Json.JsonElement")
+        {
+            return ((dynamic)body).GetRawText();
+        }
+
+        if (typeName == "System.Text.Json.JsonDocument")
+        {
+            return ((dynamic)body).RootElement.GetRawText();
+        }
+
+        return JToken.FromObject(body).ToString(Formatting.None);
     }
 
     private static string? FormatBodies(IEnumerable<object?> bodies)

src/WireMock.Net.Extensions.Routing/WireMock.Net.Extensions.Routing.csproj

@@ -25,7 +25,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <PackageReference Include="JsonConverter.Abstractions" Version="0.8.0" />
+      <PackageReference Include="JsonConverter.Abstractions" Version="0.11.0" />
     </ItemGroup>
 
     <ItemGroup>

src/WireMock.Net.FluentAssertions/Assertions/WireMockAssertions.WithBody.cs

@@ -31,19 +31,19 @@ public partial class WireMockAssertions
     }
 
     [CustomAssertion]
-    public AndConstraint<WireMockAssertions> WithBodyAsJson(object body, string because = "", params object[] becauseArgs)
+    public AndConstraint<WireMockAssertions> WithBodyAsJson(object body, IJsonMatcher? jsonMatcher = null, string because = "", params object[] becauseArgs)
     {
-        return WithBodyAsJson(new JsonMatcher(body), because, becauseArgs);
+        return WithBodyAsJson(jsonMatcher ?? new JsonMatcher(body), because, becauseArgs);
     }
 
     [CustomAssertion]
-    public AndConstraint<WireMockAssertions> WithBodyAsJson(string body, string because = "", params object[] becauseArgs)
+    public AndConstraint<WireMockAssertions> WithBodyAsJson(string body, IJsonMatcher? jsonMatcher = null, string because = "", params object[] becauseArgs)
     {
-        return WithBodyAsJson(new JsonMatcher(body), because, becauseArgs);
+        return WithBodyAsJson(jsonMatcher ?? new JsonMatcher(body), because, becauseArgs);
     }
 
     [CustomAssertion]
-    public AndConstraint<WireMockAssertions> WithBodyAsJson(IObjectMatcher matcher, string because = "", params object[] becauseArgs)
+    public AndConstraint<WireMockAssertions> WithBodyAsJson(IJsonMatcher matcher, string because = "", params object[] becauseArgs)
     {
         var (filter, condition) = BuildFilterAndCondition(r => r.BodyAsJson, matcher);
 
@@ -126,15 +126,44 @@ public partial class WireMockAssertions
 
     private static string? FormatBody(object? body)
     {
-        return body switch
+        if (body == null)
         {
-            null => null,
+            return null;
-            string str => str,
+        }
-            AnyOf<string, StringPattern>[] stringPatterns => FormatBodies(stringPatterns.Select(p => p.GetPattern())),
+
-            byte[] bytes => $"byte[{bytes.Length}] {{...}}",
+        if (body is string str)
-            JToken jToken => jToken.ToString(Formatting.None),
+        {
-            _ => JToken.FromObject(body).ToString(Formatting.None)
+            return str;
-        };
+        }
+
+        if (body is AnyOf<string, StringPattern>[] stringPatterns)
+        {
+            return FormatBodies(stringPatterns.Select(p => p.GetPattern()));
+        }
+
+        if (body is byte[] bytes)
+        {
+            return $"byte[{bytes.Length}] {{...}}";
+        }
+
+        if (body is JToken jToken)
+        {
+            return jToken.ToString(Formatting.None);
+        }
+
+        // System.IO.FileNotFoundException : Could not load file or assembly 'System.Text.Json, Version=10.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified.
+        var typeName = body.GetType().FullName;
+        if (typeName == "System.Text.Json.JsonElement")
+        {
+            return ((dynamic)body).GetRawText();
+        }
+
+        if (typeName == "System.Text.Json.JsonDocument")
+        {
+            return ((dynamic)body).RootElement.GetRawText();
+        }
+
+        return JToken.FromObject(body).ToString(Formatting.None);
     }
 
     private static string? FormatBodies(IEnumerable<object?> bodies)

src/WireMock.Net.Matchers.SystemTextJsonPath/Matchers/SystemTextJsonPathMatcher.cs

@@ -0,0 +1,184 @@
+// Copyright © WireMock.Net
+
+using System.Text.Json;
+using System.Text.Json.Nodes;
+using AnyOfTypes;
+using Json.Path;
+using Stef.Validation;
+using WireMock.Extensions;
+using WireMock.Models;
+using WireMock.Util;
+
+namespace WireMock.Matchers;
+
+/// <summary>
+/// SystemTextJsonPathMatcher - behaves the same as JsonPathMatcher but uses System.Text.Json and Json.Path instead of Newtonsoft.Json.
+/// </summary>
+/// <seealso cref="ISystemTextJsonPathMatcher" />
+public class SystemTextJsonPathMatcher : ISystemTextJsonPathMatcher
+{
+    private readonly AnyOf<string, StringPattern>[] _patterns;
+
+    /// <inheritdoc />
+    public MatchBehaviour MatchBehaviour { get; }
+
+    /// <inheritdoc />
+    public object Value { get; }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="SystemTextJsonPathMatcher"/> class.
+    /// </summary>
+    /// <param name="patterns">The patterns.</param>
+    public SystemTextJsonPathMatcher(params string[] patterns)
+        : this(MatchBehaviour.AcceptOnMatch, MatchOperator.Or, patterns.ToAnyOfPatterns())
+    {
+    }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="SystemTextJsonPathMatcher"/> class.
+    /// </summary>
+    /// <param name="patterns">The patterns.</param>
+    public SystemTextJsonPathMatcher(params AnyOf<string, StringPattern>[] patterns)
+        : this(MatchBehaviour.AcceptOnMatch, MatchOperator.Or, patterns)
+    {
+    }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="SystemTextJsonPathMatcher"/> class.
+    /// </summary>
+    /// <param name="matchBehaviour">The match behaviour.</param>
+    /// <param name="matchOperator">The <see cref="Matchers.MatchOperator"/> to use. (default = "Or")</param>
+    /// <param name="patterns">The patterns.</param>
+    public SystemTextJsonPathMatcher(
+        MatchBehaviour matchBehaviour,
+        MatchOperator matchOperator = MatchOperator.Or,
+        params AnyOf<string, StringPattern>[] patterns)
+    {
+        _patterns = Guard.NotNull(patterns);
+        MatchBehaviour = matchBehaviour;
+        MatchOperator = matchOperator;
+        Value = patterns;
+    }
+
+    /// <inheritdoc />
+    public MatchResult IsMatch(string? input)
+    {
+        var score = MatchScores.Mismatch;
+        Exception? exception = null;
+
+        if (!string.IsNullOrWhiteSpace(input))
+        {
+            try
+            {
+                var node = JsonNode.Parse(input!);
+                score = IsMatchInternal(node);
+            }
+            catch (Exception ex)
+            {
+                exception = ex;
+            }
+        }
+
+        return MatchResult.From(Name, MatchBehaviourHelper.Convert(MatchBehaviour, score), exception);
+    }
+
+    /// <inheritdoc />
+    public MatchResult IsMatch(object? input)
+    {
+        var score = MatchScores.Mismatch;
+        Exception? exception = null;
+
+        // When input is null or byte[], return Mismatch.
+        if (input != null && input is not byte[])
+        {
+            try
+            {
+                JsonNode? node = input switch
+                {
+                    JsonNode jsonNode => jsonNode,
+                    string str => JsonNode.Parse(str),
+                    _ => JsonNode.Parse(JsonSerializer.Serialize(input))
+                };
+
+                score = IsMatchInternal(node);
+            }
+            catch (Exception ex)
+            {
+                exception = ex;
+            }
+        }
+
+        return MatchResult.From(Name, MatchBehaviourHelper.Convert(MatchBehaviour, score), exception);
+    }
+
+    /// <inheritdoc />
+    public AnyOf<string, StringPattern>[] GetPatterns()
+    {
+        return _patterns;
+    }
+
+    /// <inheritdoc />
+    public MatchOperator MatchOperator { get; }
+
+    /// <inheritdoc />
+    public string Name => nameof(SystemTextJsonPathMatcher);
+
+    /// <inheritdoc />
+    public string GetCSharpCodeArguments()
+    {
+        return $"new {Name}" +
+               $"(" +
+               $"{MatchBehaviour.GetFullyQualifiedEnumValue()}, " +
+               $"{MatchOperator.GetFullyQualifiedEnumValue()}, " +
+               $"{MappingConverterUtils.ToCSharpCodeArguments(_patterns)}" +
+               $")";
+    }
+
+    private double IsMatchInternal(JsonNode? node)
+    {
+        // JsonPath.Net requires the node to be inside an object or array for filter expressions.
+        // Similar to JsonPathMatcher's ConvertJTokenToJArrayIfNeeded, wrap a plain object in an array
+        // when it's an object with a single non-array child property.
+        var evaluationNode = WrapIfNeeded(node);
+
+        var values = _patterns
+            .Select(pattern =>
+            {
+                var path = JsonPath.Parse(pattern.GetPattern());
+                var result = path.Evaluate(evaluationNode);
+                return result.Matches is { Count: > 0 };
+            })
+            .ToArray();
+
+        return MatchScores.ToScore(values, MatchOperator);
+    }
+
+    // Mirrors JsonPathMatcher.ConvertJTokenToJArrayIfNeeded:
+    // If the node is an object with exactly one property whose value is not already an array,
+    // wrap that value in an array so that filter expressions (e.g. [?(@.x == y)]) can match.
+    private static JsonNode? WrapIfNeeded(JsonNode? node)
+    {
+        if (node is not JsonObject obj)
+        {
+            return node;
+        }
+
+        var properties = obj.ToList();
+        if (properties.Count != 1)
+        {
+            return node;
+        }
+
+        var single = properties[0];
+        if (single.Value is JsonArray)
+        {
+            return node;
+        }
+
+        var clonedValue = JsonNode.Parse(single.Value?.ToJsonString() ?? "null");
+        return new JsonObject
+        {
+            [single.Key] = new JsonArray(clonedValue)
+        };
+    }
+}

src/WireMock.Net.Matchers.SystemTextJsonPath/Properties/AssemblyInfo.cs

@@ -0,0 +1,5 @@
+// Copyright © WireMock.Net
+
+using System.Runtime.CompilerServices;
+
+[assembly: InternalsVisibleTo("WireMock.Net.Tests, PublicKey=0024000004800000940000000602000000240000525341310004000001000100e138ec44d93acac565953052636eb8d5e7e9f27ddb030590055cd1a0ab2069a5623f1f77ca907d78e0b37066ca0f6d63da7eecc3fcb65b76aa8ebeccf7ebe1d11264b8404cd9b1cbbf2c83f566e033b3e54129f6ef28daffff776ba7aebbc53c0d635ebad8f45f78eb3f7e0459023c218f003416e080f96a1a3c5ffeb56bee9e")]

src/WireMock.Net.Matchers.SystemTextJsonPath/WireMock.Net.Matchers.SystemTextJsonPath.csproj

@@ -0,0 +1,41 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <Description>A SystemTextJsonPathMatcher which can be used to match WireMock.Net Requests using JsonPath.Net.</Description>
+        <AssemblyTitle>WireMock.Net.Matchers.SystemTextJsonPath</AssemblyTitle>
+        <Authors>Stef Heyenrath</Authors>
+        <TargetFrameworks>netstandard2.0;net8.0</TargetFrameworks>
+        <GenerateDocumentationFile>true</GenerateDocumentationFile>
+        <PackageTags>wiremock;matchers;matcher;jsonpath;systemtextjson</PackageTags>
+        <RootNamespace>WireMock</RootNamespace>
+        <PackageId>WireMock.Net.Matchers.SystemTextJsonPath</PackageId>
+        <ProjectGuid>{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}</ProjectGuid>
+        <PublishRepositoryUrl>true</PublishRepositoryUrl>
+        <AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>
+        <EmbedUntrackedSources>true</EmbedUntrackedSources>
+        <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+        <GenerateBindingRedirectsOutputType>true</GenerateBindingRedirectsOutputType>
+        <SignAssembly>true</SignAssembly>
+        <AssemblyOriginatorKeyFile>../WireMock.Net/WireMock.Net.snk</AssemblyOriginatorKeyFile>
+        <!--<DelaySign>true</DelaySign>-->
+        <PublicSign Condition=" '$(OS)' != 'Windows_NT' ">true</PublicSign>
+        <PackageLicenseExpression>MIT</PackageLicenseExpression>
+    </PropertyGroup>
+
+    <PropertyGroup Condition="'$(Configuration)' == 'Debug - Sonar'">
+        <CodeAnalysisRuleSet>../WireMock.Net/WireMock.Net.ruleset</CodeAnalysisRuleSet>
+    </PropertyGroup>
+
+    <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
+        <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\WireMock.Net.Shared\WireMock.Net.Shared.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <PackageReference Include="JsonPath.Net" Version="3.0.2" />
+    </ItemGroup>
+
+</Project>

src/WireMock.Net.MimePart/Matchers/MimePartMatcher.cs

@@ -1,7 +1,8 @@
 // Copyright © WireMock.Net
 
-using System;
+using JsonConverter.Abstractions;
-using System.Collections.Generic;
+using JsonConverter.Newtonsoft.Json;
+using Newtonsoft.Json;
 using WireMock.Matchers.Helpers;
 using WireMock.Models.Mime;
 using WireMock.Util;
@@ -15,6 +16,8 @@ public class MimePartMatcher : IMimePartMatcher
 {
     private readonly IList<(string Name, Func<IMimePartData, MatchResult> func)> _matcherFunctions;
 
+    private readonly IJsonConverter _jsonConverter;
+
     /// <inheritdoc />
     public string Name => nameof(MimePartMatcher);
 
@@ -41,7 +44,8 @@ public class MimePartMatcher : IMimePartMatcher
         IStringMatcher? contentTypeMatcher,
         IStringMatcher? contentDispositionMatcher,
         IStringMatcher? contentTransferEncodingMatcher,
-        IMatcher? contentMatcher
+        IMatcher? contentMatcher,
+        IJsonConverter? jsonConverter = null
     )
     {
         MatchBehaviour = matchBehaviour;
@@ -49,6 +53,7 @@ public class MimePartMatcher : IMimePartMatcher
         ContentDispositionMatcher = contentDispositionMatcher;
         ContentTransferEncodingMatcher = contentTransferEncodingMatcher;
         ContentMatcher = contentMatcher;
+        _jsonConverter = jsonConverter ?? new NewtonsoftJsonConverter();
 
         _matcherFunctions = [];
         if (ContentTypeMatcher != null)
@@ -107,7 +112,8 @@ public class MimePartMatcher : IMimePartMatcher
             ContentType = GetContentTypeAsString(mimePart.ContentType),
             DeserializeJson = true,
             ContentEncoding = null, // mimePart.ContentType?.CharsetEncoding.ToString(),
-            DecompressGZipAndDeflate = true
+            DecompressGZipAndDeflate = true,
+            DefaultJsonConverter = _jsonConverter
         };
 
         var bodyData = BodyParser.ParseAsync(bodyParserSettings).ConfigureAwait(false).GetAwaiter().GetResult();

src/WireMock.Net.Minimal/Http/HttpResponseMessageHelper.cs

@@ -1,8 +1,7 @@
 // Copyright © WireMock.Net
 
-using System.Linq;
 using System.Net;
-using System.Net.Http;
+using JsonConverter.Abstractions;
 using WireMock.Util;
 
 namespace WireMock.Http;
@@ -15,7 +14,8 @@ internal static class HttpResponseMessageHelper
         Uri originalUri,
         bool deserializeJson,
         bool decompressGzipAndDeflate,
-        bool deserializeFormUrlEncoded)
+        bool deserializeFormUrlEncoded,
+        IJsonConverter jsonConverter)
     {
         var responseMessage = new ResponseMessage { StatusCode = (int)httpResponseMessage.StatusCode };
 
@@ -45,7 +45,8 @@ internal static class HttpResponseMessageHelper
                     DeserializeJson = deserializeJson,
                     ContentEncoding = contentEncodingHeader?.FirstOrDefault(),
                     DecompressGZipAndDeflate = decompressGzipAndDeflate,
-                    DeserializeFormUrlEncoded = deserializeFormUrlEncoded
+                    DeserializeFormUrlEncoded = deserializeFormUrlEncoded,
+                    DefaultJsonConverter = jsonConverter
                 };
                 responseMessage.BodyData = await BodyParser.ParseAsync(bodyParserSettings).ConfigureAwait(false);
             }

src/WireMock.Net.Minimal/Mapping.cs

@@ -62,6 +62,9 @@ public class Mapping : IMapping
     /// <inheritdoc />
     public bool IsProxy => Provider is ProxyAsyncResponseProvider;
 
+    /// <inheritdoc />
+    public bool IsDisabled { get; set; }
+
     /// <inheritdoc />
     public bool LogMapping => Provider is not (DynamicResponseProvider or DynamicAsyncResponseProvider);
 

src/WireMock.Net.Minimal/Matchers/AbstractJsonPartialMatcher.cs

@@ -1,6 +1,5 @@
 // Copyright © WireMock.Net
 
-using System.Linq;
 using Newtonsoft.Json.Linq;
 using WireMock.Util;
 

src/WireMock.Net.Minimal/Matchers/AbstractSystemTextJsonPartialMatcher.cs

@@ -0,0 +1,173 @@
+// Copyright © WireMock.Net
+
+using System.Text.Json;
+using WireMock.Util;
+
+namespace WireMock.Matchers;
+
+/// <summary>
+/// Generic AbstractSystemTextJsonPartialMatcher - uses System.Text.Json instead of Newtonsoft.Json.
+/// </summary>
+public abstract class AbstractSystemTextJsonPartialMatcher : SystemTextJsonMatcher
+{
+    /// <summary>
+    /// Initializes a new instance of the <see cref="AbstractSystemTextJsonPartialMatcher"/> class.
+    /// </summary>
+    protected AbstractSystemTextJsonPartialMatcher(string value, bool ignoreCase = false, bool regex = false)
+        : base(value, ignoreCase, regex)
+    {
+    }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="AbstractSystemTextJsonPartialMatcher"/> class.
+    /// </summary>
+    protected AbstractSystemTextJsonPartialMatcher(object value, bool ignoreCase = false, bool regex = false)
+        : base(value, ignoreCase, regex)
+    {
+    }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="AbstractSystemTextJsonPartialMatcher"/> class.
+    /// </summary>
+    protected AbstractSystemTextJsonPartialMatcher(MatchBehaviour matchBehaviour, object value, bool ignoreCase = false, bool regex = false)
+        : base(matchBehaviour, value, ignoreCase, regex)
+    {
+    }
+
+    /// <inheritdoc />
+    protected override bool IsMatch(JsonElement value, JsonElement? input)
+    {
+        if (input == null)
+        {
+            return false;
+        }
+
+        var inputElement = input.Value;
+
+        // Regex on a string value
+        if (Regex && value.ValueKind == JsonValueKind.String)
+        {
+            var valueAsString = value.GetString()!;
+            var inputAsString = GetStringValue(inputElement);
+
+            var (valid, result) = RegexUtils.MatchRegex(valueAsString, inputAsString);
+            if (valid)
+            {
+                return result;
+            }
+        }
+
+        // Guid comparison: both strings, both parseable as Guid
+        if (value.ValueKind == JsonValueKind.String && inputElement.ValueKind == JsonValueKind.String)
+        {
+            var valueStr = value.GetString()!;
+            var inputStr = inputElement.GetString()!;
+            if (Guid.TryParse(valueStr, out var vg) && Guid.TryParse(inputStr, out var ig))
+            {
+                return IsMatch(vg.ToString(), ig.ToString());
+            }
+        }
+
+        // Type mismatch (after regex/guid checks)
+        if (value.ValueKind != inputElement.ValueKind)
+        {
+            return false;
+        }
+
+        switch (value.ValueKind)
+        {
+            case JsonValueKind.Object:
+            {
+                var nestedValues = value.EnumerateObject().ToArray();
+                if (nestedValues.Length == 0)
+                {
+                    return true;
+                }
+
+                return nestedValues.All(pair =>
+                {
+                    var selected = SelectElement(inputElement, pair.Name);
+                    return selected != null && IsMatch(pair.Value, selected.Value);
+                });
+            }
+
+            case JsonValueKind.Array:
+            {
+                var valuesArray = value.EnumerateArray().ToArray();
+                if (valuesArray.Length == 0)
+                {
+                    return true;
+                }
+
+                var tokenArray = inputElement.EnumerateArray().ToArray();
+                if (tokenArray.Length == 0)
+                {
+                    return false;
+                }
+
+                return valuesArray.All(subFilter => tokenArray.Any(subToken => IsMatch(subFilter, subToken)));
+            }
+
+            default:
+                return IsMatch(GetStringValue(value), GetStringValue(inputElement));
+        }
+    }
+
+    /// <summary>
+    /// Check if two strings are a match (matching can be done exact or wildcard).
+    /// </summary>
+    protected abstract bool IsMatch(string value, string input);
+
+    /// <summary>
+    /// Selects a <see cref="JsonElement"/> from an object using a key that may be a plain property name,
+    /// a dotted path (e.g. "a.b.c") or bracket notation (e.g. "['name.with.dot']"),
+    /// mirroring Newtonsoft's <c>SelectToken</c> + direct indexer fallback.
+    /// </summary>
+    private static JsonElement? SelectElement(JsonElement input, string key)
+    {
+        if (input.ValueKind != JsonValueKind.Object)
+        {
+            return null;
+        }
+
+        // Direct property access (also handles keys containing colons or dots that are literal property names)
+        if (input.TryGetProperty(key, out var direct))
+        {
+            return direct;
+        }
+
+        // Bracket notation: ['property.name.with.dots']
+        if (key.StartsWith("['") && key.EndsWith("']"))
+        {
+            var propertyName = key.Substring(2, key.Length - 4);
+            return input.TryGetProperty(propertyName, out var bracketValue) ? bracketValue : null;
+        }
+
+        // Dotted path: a.b.c
+        if (key.Contains('.'))
+        {
+            var parts = key.Split('.');
+            var current = input;
+            foreach (var part in parts)
+            {
+                if (current.ValueKind != JsonValueKind.Object || !current.TryGetProperty(part, out var next))
+                {
+                    return null;
+                }
+
+                current = next;
+            }
+
+            return current;
+        }
+
+        return null;
+    }
+
+    private static string GetStringValue(JsonElement element)
+    {
+        return element.ValueKind == JsonValueKind.String
+            ? element.GetString()!
+            : element.GetRawText();
+    }
+}

src/WireMock.Net.Minimal/Matchers/JSONPathMatcher.cs

@@ -1,6 +1,5 @@
 // Copyright © WireMock.Net
 
-using System.Linq;
 using AnyOfTypes;
 using Newtonsoft.Json.Linq;
 using Stef.Validation;
@@ -13,9 +12,8 @@ namespace WireMock.Matchers;
 /// <summary>
 /// JsonPathMatcher
 /// </summary>
-/// <seealso cref="IStringMatcher" />
+/// <seealso cref="IJsonPathMatcher" />
-/// <seealso cref="IObjectMatcher" />
+public class JsonPathMatcher : IJsonPathMatcher
-public class JsonPathMatcher : IStringMatcher, IObjectMatcher
 {
     private readonly AnyOf<string, StringPattern>[] _patterns;
 

src/WireMock.Net.Minimal/Matchers/JsonMatcher.cs

@@ -1,11 +1,12 @@
 // Copyright © WireMock.Net
 
-using System.Linq;
+using System.Collections;
+using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 using Stef.Validation;
 using WireMock.Extensions;
+using WireMock.Serialization;
 using WireMock.Util;
-using JsonUtils = WireMock.Util.JsonUtils;
 
 namespace WireMock.Matchers;
 
@@ -69,7 +70,7 @@ public class JsonMatcher : IJsonMatcher
         Regex = regex;
 
         Value = value;
-        _valueAsJToken = JsonUtils.ConvertValueToJToken(value);
+        _valueAsJToken = ConvertValueToJToken(value);
     }
 
     /// <inheritdoc />
@@ -83,7 +84,7 @@ public class JsonMatcher : IJsonMatcher
         {
             try
             {
-                var inputAsJToken = JsonUtils.ConvertValueToJToken(input);
+                var inputAsJToken = ConvertValueToJToken(input);
 
                 var match = IsMatch(RenameJToken(_valueAsJToken), RenameJToken(inputAsJToken));
                 score = MatchScores.ToScore(match);
@@ -241,6 +242,18 @@ public class JsonMatcher : IJsonMatcher
         return new JObject(renamedProperties);
     }
 
+    private static JToken ConvertValueToJToken(object value)
+    {
+        // Check if JToken, string, IEnumerable or object
+        return value switch
+        {
+            JToken tokenValue => tokenValue,
+            string stringValue => JsonConvert.DeserializeObject<JToken>(stringValue, JsonSerializationConstants.JsonDeserializerSettingsWithDateParsingNone)!,
+            IEnumerable enumerableValue => JArray.FromObject(enumerableValue),
+            _ => JObject.FromObject(value),
+        };
+    }
+
     private static string? ToUpper(string? input)
     {
         return input?.ToUpperInvariant();

src/WireMock.Net.Minimal/Matchers/Request/RequestMessageBodyMatcher.cs

@@ -1,6 +1,5 @@
 // Copyright © WireMock.Net
 
-using System.Linq;
 using Stef.Validation;
 using WireMock.Matchers.Helpers;
 using WireMock.Util;
@@ -142,6 +141,9 @@ public class RequestMessageBodyMatcher : IRequestMatcher
         MatchOperator = matchOperator;
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.Body;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {

src/WireMock.Net.Minimal/Matchers/Request/RequestMessageBodyMatcher`1.cs

@@ -31,6 +31,9 @@ public class RequestMessageBodyMatcher<T> : IRequestMatcher
         Func = Guard.NotNull(func);
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.BodyOfT;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {

src/WireMock.Net.Minimal/Matchers/Request/RequestMessageClientIPMatcher.cs

@@ -74,6 +74,9 @@ public class RequestMessageClientIPMatcher : IRequestMatcher
         Funcs = Guard.NotNull(funcs);
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.ClientIP;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {

src/WireMock.Net.Minimal/Matchers/Request/RequestMessageCompositeMatcher.cs

@@ -20,6 +20,11 @@ public abstract class RequestMessageCompositeMatcher : IRequestMatcher
     /// </value>
     private IEnumerable<IRequestMatcher> RequestMatchers { get; }
 
+    /// <summary>
+    /// Selected type to choose the matcher from <see cref="RequestMatchers"/> which will immediately return a mismatch.
+    /// </summary>
+    internal RequestMatcherType? EarlyMatcherType { get; private protected set; }
+
     /// <summary>
     /// Initializes a new instance of the <see cref="RequestMessageCompositeMatcher"/> class.
     /// </summary>
@@ -31,6 +36,9 @@ public abstract class RequestMessageCompositeMatcher : IRequestMatcher
         _type = type;
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.Composite;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {
@@ -39,6 +47,13 @@ public abstract class RequestMessageCompositeMatcher : IRequestMatcher
             return MatchScores.Mismatch;
         }
 
+        var earlyMatcher = new RequestMessageEarlyMatcher(EarlyMatcherType, RequestMatchers);
+        var earlyMatchResult = earlyMatcher.GetMatchingScore(requestMessage, requestMatchResult);
+        if (!MatchScores.IsPerfect(earlyMatchResult))
+        {
+            return MatchScores.Mismatch;
+        }
+
         if (_type == CompositeMatcherType.And)
         {
             return RequestMatchers.Average(requestMatcher => requestMatcher.GetMatchingScore(requestMessage, requestMatchResult));

src/WireMock.Net.Minimal/Matchers/Request/RequestMessageCookieMatcher.cs

@@ -1,7 +1,6 @@
 // Copyright © WireMock.Net
 
 using Stef.Validation;
-using System.Linq;
 
 namespace WireMock.Matchers.Request;
 
@@ -93,6 +92,9 @@ public class RequestMessageCookieMatcher : IRequestMatcher
         Name = string.Empty; // Not used when Func, but set to a non-null valid value.
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.Cookie;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {

src/WireMock.Net.Minimal/Matchers/Request/RequestMessageEarlyMatcher.cs

@@ -0,0 +1,35 @@
+// Copyright © WireMock.Net
+
+namespace WireMock.Matchers.Request;
+
+/// <summary>
+/// Return the mismatch if the matching score of matchers is not perfect.
+/// </summary>
+internal sealed class RequestMessageEarlyMatcher(
+    RequestMatcherType? earlyMatcherType,
+    IEnumerable<IRequestMatcher> requestMatchers) : IRequestMatcher
+{
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.Composite;
+
+    /// <inheritdoc />
+    public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
+    {
+        if (earlyMatcherType is null)
+        {
+            return MatchScores.Perfect;
+        }
+
+        var earlyMatchers = requestMatchers
+            .Where(m => m.Type == earlyMatcherType)
+            .ToList();
+
+        if (earlyMatchers.Count is 0)
+        {
+            return MatchScores.Perfect;
+        }
+
+        var compositeMatcher = new RequestBuilders.Request(earlyMatchers);
+        return compositeMatcher.GetMatchingScore(requestMessage, requestMatchResult);
+    }
+}

src/WireMock.Net.Minimal/Matchers/Request/RequestMessageHeaderMatcher.cs

@@ -1,6 +1,5 @@
 // Copyright © WireMock.Net
 
-using System.Linq;
 using Stef.Validation;
 using WireMock.Types;
 
@@ -12,7 +11,7 @@ namespace WireMock.Matchers.Request;
 /// <inheritdoc cref="IRequestMatcher"/>
 public class RequestMessageHeaderMatcher : IRequestMatcher
 {
-    private const string _name = nameof(RequestMessageCookieMatcher);
+    private const string _name = nameof(RequestMessageHeaderMatcher);
 
     /// <summary>
     /// MatchBehaviour
@@ -106,6 +105,9 @@ public class RequestMessageHeaderMatcher : IRequestMatcher
         Name = string.Empty; // Not used when Func, but set to a non-null valid value.
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.Header;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {

src/WireMock.Net.Minimal/Matchers/Request/RequestMessageHttpVersionMatcher.cs

@@ -65,6 +65,9 @@ public class RequestMessageHttpVersionMatcher : IRequestMatcher
         MatcherOnStringFunc = Guard.NotNull(func);
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.HttpVersion;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {

src/WireMock.Net.Minimal/Matchers/Request/RequestMessageMethodMatcher.cs

@@ -46,6 +46,9 @@ internal class RequestMessageMethodMatcher : IRequestMatcher
         MatchOperator = matchOperator;
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.Method;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {

src/WireMock.Net.Minimal/Matchers/Request/RequestMessageMultiPartMatcher.cs

@@ -55,6 +55,9 @@ public class RequestMessageMultiPartMatcher : IRequestMatcher
         MatchOperator = matchOperator;
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.MultiPart;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {

src/WireMock.Net.Minimal/Matchers/Request/RequestMessageParamMatcher.cs

@@ -82,6 +82,9 @@ public class RequestMessageParamMatcher : IRequestMatcher
         Funcs = Guard.NotNull(funcs);
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.Param;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {

src/WireMock.Net.Minimal/Matchers/Request/RequestMessagePathMatcher.cs

@@ -72,6 +72,9 @@ public class RequestMessagePathMatcher : IRequestMatcher
         Funcs = Guard.NotNull(funcs);
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.Path;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {

src/WireMock.Net.Minimal/Matchers/Request/RequestMessageScenarioAndStateMatcher.cs

@@ -29,6 +29,9 @@ internal class RequestMessageScenarioAndStateMatcher : IRequestMatcher
         _executionConditionState = executionConditionState;
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.ScenarioAndState;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {

src/WireMock.Net.Minimal/Matchers/Request/RequestMessageUrlMatcher.cs

@@ -72,6 +72,9 @@ public class RequestMessageUrlMatcher : IRequestMatcher
         Funcs = Guard.NotNull(funcs);
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.Url;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {

src/WireMock.Net.Minimal/Matchers/SystemTextJsonMatcher.cs

@@ -0,0 +1,282 @@
+// Copyright © WireMock.Net
+
+using System.Collections;
+using System.Text.Json;
+using Stef.Validation;
+using WireMock.Extensions;
+using WireMock.Util;
+
+namespace WireMock.Matchers;
+
+/// <summary>
+/// SystemTextJsonMatcher - behaves the same as <see cref="JsonMatcher"/> but uses System.Text.Json instead of Newtonsoft.Json.
+/// </summary>
+public class SystemTextJsonMatcher : IJsonMatcher
+{
+    private static readonly JsonSerializerOptions DefaultSerializerOptions = new()
+    {
+        PropertyNameCaseInsensitive = false
+    };
+
+    /// <inheritdoc />
+    public virtual string Name => nameof(SystemTextJsonMatcher);
+
+    /// <inheritdoc />
+    public object Value { get; }
+
+    /// <inheritdoc />
+    public MatchBehaviour MatchBehaviour { get; }
+
+    /// <inheritdoc cref="IIgnoreCaseMatcher.IgnoreCase"/>
+    public bool IgnoreCase { get; }
+
+    /// <summary>
+    /// Support Regex
+    /// </summary>
+    public bool Regex { get; }
+
+    private readonly JsonElement _valueAsJsonElement;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="SystemTextJsonMatcher"/> class.
+    /// </summary>
+    /// <param name="value">The string value to check for equality.</param>
+    /// <param name="ignoreCase">Ignore the case from the PropertyName and PropertyValue (string only).</param>
+    /// <param name="regex">Support Regex.</param>
+    public SystemTextJsonMatcher(string value, bool ignoreCase = false, bool regex = false)
+        : this(MatchBehaviour.AcceptOnMatch, value, ignoreCase, regex)
+    {
+    }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="SystemTextJsonMatcher"/> class.
+    /// </summary>
+    /// <param name="value">The object value to check for equality.</param>
+    /// <param name="ignoreCase">Ignore the case from the PropertyName and PropertyValue (string only).</param>
+    /// <param name="regex">Support Regex.</param>
+    public SystemTextJsonMatcher(object value, bool ignoreCase = false, bool regex = false)
+        : this(MatchBehaviour.AcceptOnMatch, value, ignoreCase, regex)
+    {
+    }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="SystemTextJsonMatcher"/> class.
+    /// </summary>
+    /// <param name="matchBehaviour">The match behaviour.</param>
+    /// <param name="value">The value to check for equality.</param>
+    /// <param name="ignoreCase">Ignore the case from the PropertyName and PropertyValue (string only).</param>
+    /// <param name="regex">Support Regex.</param>
+    public SystemTextJsonMatcher(MatchBehaviour matchBehaviour, object value, bool ignoreCase = false, bool regex = false)
+    {
+        Guard.NotNull(value);
+
+        MatchBehaviour = matchBehaviour;
+        IgnoreCase = ignoreCase;
+        Regex = regex;
+
+        Value = value;
+        _valueAsJsonElement = ConvertToJsonElement(value);
+    }
+
+    /// <inheritdoc />
+    public MatchResult IsMatch(object? input)
+    {
+        var score = MatchScores.Mismatch;
+        Exception? error = null;
+
+        // When input is null or byte[], return Mismatch.
+        if (input != null && input is not byte[])
+        {
+            try
+            {
+                var inputAsJsonElement = ConvertToJsonElement(input);
+
+                var match = IsMatch(NormalizeElement(_valueAsJsonElement), NormalizeElement(inputAsJsonElement));
+                score = MatchScores.ToScore(match);
+            }
+            catch (Exception ex)
+            {
+                error = ex;
+            }
+        }
+
+        return MatchResult.From(Name, MatchBehaviourHelper.Convert(MatchBehaviour, score), error);
+    }
+
+    /// <inheritdoc />
+    public virtual string GetCSharpCodeArguments()
+    {
+        return $"new {Name}" +
+               $"(" +
+               $"{MatchBehaviour.GetFullyQualifiedEnumValue()}, " +
+               $"{CSharpFormatter.ConvertToAnonymousObjectDefinition(Value, 3)}, " +
+               $"{CSharpFormatter.ToCSharpBooleanLiteral(IgnoreCase)}, " +
+               $"{CSharpFormatter.ToCSharpBooleanLiteral(Regex)}" +
+               $")";
+    }
+
+    /// <summary>
+    /// Compares the input against the matcher value
+    /// </summary>
+    protected virtual bool IsMatch(JsonElement value, JsonElement? input)
+    {
+        if (input == null)
+        {
+            return false;
+        }
+
+        var inputElement = input.Value;
+
+        // If using Regex and the value is a string, use the MatchRegex method.
+        if (Regex && value.ValueKind == JsonValueKind.String)
+        {
+            var valueAsString = value.GetString()!;
+            var inputAsString = inputElement.ValueKind == JsonValueKind.String
+                ? inputElement.GetString()!
+                : inputElement.GetRawText();
+
+            var (valid, result) = RegexUtils.MatchRegex(valueAsString, inputAsString);
+            if (valid)
+            {
+                return result;
+            }
+        }
+
+        // If the value is a Guid (string) and input is a string, or vice versa, compare as strings.
+        if (value.ValueKind == JsonValueKind.String && inputElement.ValueKind == JsonValueKind.String)
+        {
+            var valueStr = value.GetString()!;
+            var inputStr = inputElement.GetString()!;
+
+            if (Guid.TryParse(valueStr, out var valueGuid) && Guid.TryParse(inputStr, out var inputGuid))
+            {
+                return valueGuid == inputGuid;
+            }
+        }
+
+        switch (value.ValueKind)
+        {
+            case JsonValueKind.Object:
+                {
+                    if (inputElement.ValueKind != JsonValueKind.Object)
+                    {
+                        return false;
+                    }
+
+                    var valueProperties = value.EnumerateObject().ToDictionary(p => p.Name, p => p.Value);
+                    var inputProperties = inputElement.EnumerateObject().ToDictionary(p => p.Name, p => p.Value);
+
+                    if (valueProperties.Count != inputProperties.Count)
+                    {
+                        return false;
+                    }
+
+                    foreach (var pair in valueProperties)
+                    {
+                        if (!inputProperties.TryGetValue(pair.Key, out var inputPropValue))
+                        {
+                            return false;
+                        }
+
+                        if (!IsMatch(pair.Value, inputPropValue))
+                        {
+                            return false;
+                        }
+                    }
+
+                    return true;
+                }
+
+            case JsonValueKind.Array:
+                {
+                    if (inputElement.ValueKind != JsonValueKind.Array)
+                    {
+                        return false;
+                    }
+
+                    var valueArray = value.EnumerateArray().ToArray();
+                    var inputArray = inputElement.EnumerateArray().ToArray();
+
+                    if (valueArray.Length != inputArray.Length)
+                    {
+                        return false;
+                    }
+
+                    return !valueArray.Where((valueToken, index) => !IsMatch(valueToken, inputArray[index])).Any();
+                }
+
+            default:
+                return value.GetRawText() == inputElement.GetRawText();
+        }
+    }
+
+    private JsonElement NormalizeElement(JsonElement element)
+    {
+        if (!IgnoreCase)
+        {
+            return element;
+        }
+
+        var normalized = NormalizeValue(element);
+        return ConvertToJsonElement(normalized);
+    }
+
+    private object NormalizeValue(JsonElement element)
+    {
+        switch (element.ValueKind)
+        {
+            case JsonValueKind.Object:
+                {
+                    var dict = new Dictionary<string, object?>();
+                    foreach (var prop in element.EnumerateObject())
+                    {
+                        var normalizedKey = prop.Name.ToUpperInvariant();
+                        dict[normalizedKey] = NormalizeValue(prop.Value);
+                    }
+
+                    return dict;
+                }
+
+            case JsonValueKind.Array:
+                {
+                    if (Regex)
+                    {
+                        return element.EnumerateArray().Select(e => (object)e.GetRawText()).ToArray();
+                    }
+
+                    return element.EnumerateArray().Select(NormalizeValue).ToArray();
+                }
+
+            case JsonValueKind.String:
+                {
+                    var str = element.GetString()!;
+                    return Regex ? str : str.ToUpperInvariant();
+                }
+
+            default:
+                return element.GetRawText();
+        }
+    }
+
+    private static JsonElement ConvertToJsonElement(object value)
+    {
+        switch (value)
+        {
+            case JsonElement jsonElement:
+                return jsonElement;
+
+            case JsonDocument jsonDocument:
+                return jsonDocument.RootElement;
+
+            case string stringValue:
+                return JsonDocument.Parse(stringValue).RootElement;
+
+            case IEnumerable enumerableValue when value is not string:
+                return JsonSerializer.SerializeToElement(enumerableValue, DefaultSerializerOptions);
+
+            default:
+                var json = JsonSerializer.Serialize(value, DefaultSerializerOptions);
+                return JsonDocument.Parse(json).RootElement;
+        }
+    }
+}

src/WireMock.Net.Minimal/Matchers/SystemTextJsonPartialMatcher.cs

@@ -0,0 +1,52 @@
+// Copyright © WireMock.Net
+
+using WireMock.Extensions;
+using WireMock.Util;
+
+namespace WireMock.Matchers;
+
+/// <summary>
+/// SystemTextJsonPartialMatcher - uses System.Text.Json instead of Newtonsoft.Json.
+/// </summary>
+public class SystemTextJsonPartialMatcher : AbstractSystemTextJsonPartialMatcher
+{
+    /// <inheritdoc />
+    public override string Name => nameof(SystemTextJsonPartialMatcher);
+
+    /// <inheritdoc />
+    public SystemTextJsonPartialMatcher(string value, bool ignoreCase = false, bool regex = false)
+        : base(value, ignoreCase, regex)
+    {
+    }
+
+    /// <inheritdoc />
+    public SystemTextJsonPartialMatcher(object value, bool ignoreCase = false, bool regex = false)
+        : base(value, ignoreCase, regex)
+    {
+    }
+
+    /// <inheritdoc />
+    public SystemTextJsonPartialMatcher(MatchBehaviour matchBehaviour, object value, bool ignoreCase = false, bool regex = false)
+        : base(matchBehaviour, value, ignoreCase, regex)
+    {
+    }
+
+    /// <inheritdoc />
+    protected override bool IsMatch(string value, string input)
+    {
+        var exactStringMatcher = new ExactMatcher(MatchBehaviour.AcceptOnMatch, IgnoreCase, MatchOperator.Or, value);
+        return exactStringMatcher.IsMatch(input).IsPerfect();
+    }
+
+    /// <inheritdoc />
+    public override string GetCSharpCodeArguments()
+    {
+        return $"new {Name}" +
+               $"(" +
+               $"{MatchBehaviour.GetFullyQualifiedEnumValue()}, " +
+               $"{CSharpFormatter.ConvertToAnonymousObjectDefinition(Value, 3)}, " +
+               $"{CSharpFormatter.ToCSharpBooleanLiteral(IgnoreCase)}, " +
+               $"{CSharpFormatter.ToCSharpBooleanLiteral(Regex)}" +
+               $")";
+    }
+}

src/WireMock.Net.Minimal/Matchers/SystemTextJsonPartialWildcardMatcher.cs

@@ -0,0 +1,52 @@
+// Copyright © WireMock.Net
+
+using WireMock.Extensions;
+using WireMock.Util;
+
+namespace WireMock.Matchers;
+
+/// <summary>
+/// SystemTextJsonPartialWildcardMatcher - uses System.Text.Json instead of Newtonsoft.Json.
+/// </summary>
+public class SystemTextJsonPartialWildcardMatcher : AbstractSystemTextJsonPartialMatcher
+{
+    /// <inheritdoc />
+    public override string Name => nameof(SystemTextJsonPartialWildcardMatcher);
+
+    /// <inheritdoc />
+    public SystemTextJsonPartialWildcardMatcher(string value, bool ignoreCase = false, bool regex = false)
+        : base(value, ignoreCase, regex)
+    {
+    }
+
+    /// <inheritdoc />
+    public SystemTextJsonPartialWildcardMatcher(object value, bool ignoreCase = false, bool regex = false)
+        : base(value, ignoreCase, regex)
+    {
+    }
+
+    /// <inheritdoc />
+    public SystemTextJsonPartialWildcardMatcher(MatchBehaviour matchBehaviour, object value, bool ignoreCase = false, bool regex = false)
+        : base(matchBehaviour, value, ignoreCase, regex)
+    {
+    }
+
+    /// <inheritdoc />
+    protected override bool IsMatch(string value, string input)
+    {
+        var wildcardStringMatcher = new WildcardMatcher(MatchBehaviour.AcceptOnMatch, value, IgnoreCase);
+        return wildcardStringMatcher.IsMatch(input).IsPerfect();
+    }
+
+    /// <inheritdoc />
+    public override string GetCSharpCodeArguments()
+    {
+        return $"new {Name}" +
+               $"(" +
+               $"{MatchBehaviour.GetFullyQualifiedEnumValue()}, " +
+               $"{CSharpFormatter.ConvertToAnonymousObjectDefinition(Value, 3)}, " +
+               $"{CSharpFormatter.ToCSharpBooleanLiteral(IgnoreCase)}, " +
+               $"{CSharpFormatter.ToCSharpBooleanLiteral(Regex)}" +
+               $")";
+    }
+}

src/WireMock.Net.Minimal/Owin/IWireMockMiddlewareOptions.cs

@@ -2,6 +2,7 @@
 
 using System.Collections.Concurrent;
 using System.Security.Cryptography.X509Certificates;
+using JsonConverter.Abstractions;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.Extensions.DependencyInjection;
 using WireMock.Handlers;
@@ -99,4 +100,12 @@ internal interface IWireMockMiddlewareOptions
     /// WebSocket settings.
     /// </summary>
     WebSocketSettings? WebSocketSettings { get; set; }
+
+    /// <summary>
+    /// Gets or sets the default JSON converter used for serialization.
+    /// </summary>
+    /// <remarks>
+    /// Set this property to customize how objects are serialized to and deserialized from JSON during mapping.
+    /// </remarks>
+    IJsonConverter DefaultJsonSerializer { get; set; }
 }

src/WireMock.Net.Minimal/Owin/Mappers/OwinRequestMapper.cs

@@ -53,7 +53,8 @@ internal class OwinRequestMapper : IOwinRequestMapper
                 ContentType = request.ContentType,
                 DeserializeJson = !options.DisableJsonBodyParsing.GetValueOrDefault(false),
                 ContentEncoding = contentEncodingHeader?.FirstOrDefault(),
-                DecompressGZipAndDeflate = !options.DisableRequestBodyDecompressing.GetValueOrDefault(false)
+                DecompressGZipAndDeflate = !options.DisableRequestBodyDecompressing.GetValueOrDefault(false),
+                DefaultJsonConverter = options.DefaultJsonSerializer
             };
 
             body = await BodyParser.ParseAsync(bodyParserSettings).ConfigureAwait(false);

src/WireMock.Net.Minimal/Owin/Mappers/OwinResponseMapper.cs

@@ -3,27 +3,25 @@
 using System.Globalization;
 using System.Net;
 using System.Text;
+using JsonConverter.Abstractions;
 using Microsoft.AspNetCore.Http;
-using Newtonsoft.Json;
 using RandomDataGenerator.FieldOptions;
 using RandomDataGenerator.Randomizers;
-using Stef.Validation;
 using WireMock.Http;
 using WireMock.ResponseBuilders;
 using WireMock.ResponseProviders;
 using WireMock.Types;
 using WireMock.Util;
 
-namespace WireMock.Owin.Mappers
+namespace WireMock.Owin.Mappers;
-{
+
 /// <summary>
 /// OwinResponseMapper
 /// </summary>
-    internal class OwinResponseMapper : IOwinResponseMapper
+internal class OwinResponseMapper(IWireMockMiddlewareOptions options) : IOwinResponseMapper
 {
     private readonly IRandomizerNumber<double> _randomizerDouble = RandomizerFactory.GetRandomizer(new FieldOptionsDouble { Min = 0, Max = 1 });
     private readonly IRandomizerBytes _randomizerBytes = RandomizerFactory.GetRandomizer(new FieldOptionsBytes { Min = 100, Max = 200 });
-        private readonly IWireMockMiddlewareOptions _options;
     private readonly Encoding _utf8NoBom = new UTF8Encoding(false);
 
     // https://msdn.microsoft.com/en-us/library/78h415ay(v=vs.110).aspx
@@ -42,15 +40,6 @@ namespace WireMock.Owin.Mappers
             }
         };
 
-        /// <summary>
-        /// Constructor
-        /// </summary>
-        /// <param name="options">The IWireMockMiddlewareOptions.</param>
-        public OwinResponseMapper(IWireMockMiddlewareOptions options)
-        {
-            _options = Guard.NotNull(options);
-        }
-
     /// <inheritdoc />
     public async Task MapAsync(IResponseMessage? responseMessage, HttpResponse response)
     {
@@ -107,7 +96,7 @@ namespace WireMock.Owin.Mappers
             }
             catch (Exception ex)
             {
-                    _options.Logger.Warn("Error writing response body. Exception : {0}", ex);
+                options.Logger.Warn("Error writing response body. Exception : {0}", ex);
             }
         }
 
@@ -136,7 +125,7 @@ namespace WireMock.Owin.Mappers
 
     private int MapStatusCode(int code)
     {
-            if (_options.AllowOnlyDefinedHttpStatusCodeInResponse == true && !Enum.IsDefined(typeof(HttpStatusCode), code))
+        if (options.AllowOnlyDefinedHttpStatusCodeInResponse == true && !Enum.IsDefined(typeof(HttpStatusCode), code))
         {
             return (int)HttpStatusCode.OK;
         }
@@ -159,8 +148,13 @@ namespace WireMock.Owin.Mappers
                 return (bodyData.Encoding ?? _utf8NoBom).GetBytes(bodyData.BodyAsString!);
 
             case BodyType.Json:
-                    var formatting = bodyData.BodyAsJsonIndented == true ? Formatting.Indented : Formatting.None;
+                var jsonConverterOptions = new JsonConverterOptions
-                    var jsonBody = JsonConvert.SerializeObject(bodyData.BodyAsJson, new JsonSerializerSettings { Formatting = formatting, NullValueHandling = NullValueHandling.Ignore });
+                {
+                    WriteIndented = bodyData.BodyAsJsonIndented == true,
+                    IgnoreNullValues = true
+                };
+
+                var jsonBody = options.DefaultJsonSerializer.Serialize(bodyData.BodyAsJson!, jsonConverterOptions);
                 return (bodyData.Encoding ?? _utf8NoBom).GetBytes(jsonBody);
 
             case BodyType.ProtoBuf:
@@ -175,10 +169,10 @@ namespace WireMock.Owin.Mappers
                 return bodyData.BodyAsBytes;
 
             case BodyType.File:
-                    return _options.FileSystemHandler?.ReadResponseBodyAsFile(bodyData.BodyAsFile!);
+                return options.FileSystemHandler?.ReadResponseBodyAsFile(bodyData.BodyAsFile!);
 
             case BodyType.MultiPart:
-                    _options.Logger.Warn("MultiPart body type is not handled!");
+                options.Logger.Warn("MultiPart body type is not handled!");
                 break;
 
             case BodyType.None:
@@ -248,4 +242,3 @@ namespace WireMock.Owin.Mappers
         response.Headers.Append(headerName, values);
     }
 }
-}

src/WireMock.Net.Minimal/Owin/MappingMatcher.cs

@@ -19,6 +19,7 @@ internal class MappingMatcher(IWireMockMiddlewareOptions options, IRandomizerDou
         var possibleMappings = new List<MappingMatcherResult>();
 
         var mappings = _options.Mappings.Values
+            .Where(m => !m.IsDisabled)
             .Where(m => m.TimeSettings.IsValid())
             .Where(m => m.Probability is null || _randomizerDoubleBetween0And1.Generate() <= m.Probability)
             .ToArray();

src/WireMock.Net.Minimal/Owin/WireMockMiddleware.cs

@@ -122,6 +122,14 @@ internal class WireMockMiddleware(
                 }
             }
 
+            // Transition scenario state immediately after matching, before any delay (global or
+            // per-mapping) so that concurrent retries arriving during a delay period see the
+            // updated state and match the correct next mapping instead of re-matching this one.
+            if (targetMapping.Scenario != null)
+            {
+                UpdateScenarioState(targetMapping);
+            }
+
             if (!targetMapping.IsAdminInterface && options.RequestProcessingDelay > TimeSpan.Zero)
             {
                 await Task.Delay(options.RequestProcessingDelay.Value).ConfigureAwait(false);
@@ -147,11 +155,6 @@ internal class WireMockMiddleware(
                 }
             }
 
-            if (targetMapping.Scenario != null)
-            {
-                UpdateScenarioState(targetMapping);
-            }
-
             if (!targetMapping.IsAdminInterface && targetMapping.Webhooks?.Length > 0)
             {
                 await SendToWebhooksAsync(targetMapping, request, response).ConfigureAwait(false);

src/WireMock.Net.Minimal/Owin/WireMockMiddlewareLogger.cs

@@ -1,7 +1,6 @@
 // Copyright © WireMock.Net
 
 using System.Diagnostics;
-using System.Linq;
 using WireMock.Logging;
 using WireMock.Owin.ActivityTracing;
 using WireMock.Serialization;
@@ -42,7 +41,7 @@ internal class WireMockMiddlewareLogger(
             if (_options.SaveUnmatchedRequests == true && match?.RequestMatchResult is not { IsPerfectMatch: true })
             {
                 var filename = $"{logEntry.Guid}.LogEntry.json";
-                _options.FileSystemHandler?.WriteUnmatchedRequest(filename, JsonUtils.Serialize(logEntry));
+                _options.FileSystemHandler?.WriteUnmatchedRequest(filename, _options.DefaultJsonSerializer.Serialize(logEntry));
             }
         }
         catch

src/WireMock.Net.Minimal/Owin/WireMockMiddlewareOptions.cs

@@ -2,6 +2,8 @@
 
 using System.Collections.Concurrent;
 using System.Security.Cryptography.X509Certificates;
+using JsonConverter.Abstractions;
+using JsonConverter.Newtonsoft.Json;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.Extensions.DependencyInjection;
 using WireMock.Handlers;
@@ -108,5 +110,9 @@ internal class WireMockMiddlewareOptions : IWireMockMiddlewareOptions
     /// <inheritdoc />
     public ConcurrentDictionary<Guid, WebSocketConnectionRegistry> WebSocketRegistries { get; } = new();
 
+    /// <inheritdoc />
     public WebSocketSettings? WebSocketSettings { get; set; }
+
+    /// <inheritdoc />
+    public IJsonConverter DefaultJsonSerializer { get; set; } = new NewtonsoftJsonConverter();
 }

src/WireMock.Net.Minimal/Proxy/ProxyHelper.cs

@@ -48,7 +48,8 @@ internal class ProxyHelper(WireMockServerSettings settings)
             originalUri,
             deserializeJson,
             decompressGzipAndDeflate,
-            deserializeFormUrlEncoded
+            deserializeFormUrlEncoded,
+            _settings.DefaultJsonSerializer
         ).ConfigureAwait(false);
 
         IMapping? newMapping = null;

src/WireMock.Net.Minimal/RequestBuilders/Request.cs

@@ -34,7 +34,7 @@ public partial class Request : RequestMessageCompositeMatcher, IRequestBuilder
     /// Initializes a new instance of the <see cref="Request"/> class.
     /// </summary>
     /// <param name="requestMatchers">The request matchers.</param>
-    private Request(IList<IRequestMatcher> requestMatchers) : base(requestMatchers)
+    internal Request(IList<IRequestMatcher> requestMatchers) : base(requestMatchers)
     {
         _requestMatchers = Guard.NotNull(requestMatchers);
     }
@@ -81,6 +81,13 @@ public partial class Request : RequestMessageCompositeMatcher, IRequestBuilder
         return this;
     }
 
+    /// <inheritdoc />
+    public IRequestBuilder WithEarlyMismatch(RequestMatcherType? earlyMatcherType)
+    {
+        EarlyMatcherType = earlyMatcherType;
+        return this;
+    }
+
     internal bool TryGetProtoBufMatcher([NotNullWhen(true)] out IProtoBufMatcher? protoBufMatcher)
     {
         protoBufMatcher = GetRequestMessageMatcher<RequestMessageProtoBufMatcher>()?.Matcher;

src/WireMock.Net.Minimal/ResponseBuilders/Response.WithBody.cs

@@ -2,8 +2,10 @@
 
 using System.Text;
 using JsonConverter.Abstractions;
+using JsonConverter.Newtonsoft.Json;
 using Stef.Validation;
 using WireMock.Models;
+using WireMock.Serialization;
 using WireMock.Types;
 using WireMock.Util;
 
@@ -119,11 +121,13 @@ public partial class Response
     }
 
     /// <inheritdoc />
-    public IResponseBuilder WithBody(string body, string? destination = BodyDestinationFormat.SameAsSource, Encoding? encoding = null)
+    public IResponseBuilder WithBody(string body, string? destination = BodyDestinationFormat.SameAsSource, Encoding? encoding = null, IJsonConverter? jsonConverter = null, JsonConverterOptions? options = null)
     {
         Guard.NotNull(body);
 
         encoding ??= Encoding.UTF8;
+        jsonConverter ??= new NewtonsoftJsonConverter();
+        options ??= JsonSerializationConstants.JsonConverterOptionsWithDateParsingNone;
 
         ResponseMessage.BodyDestination = destination;
         ResponseMessage.BodyData = new BodyData
@@ -140,7 +144,7 @@ public partial class Response
 
             case BodyDestinationFormat.Json:
                 ResponseMessage.BodyData.DetectedBodyType = BodyType.Json;
-                ResponseMessage.BodyData.BodyAsJson = JsonUtils.DeserializeObject(body);
+                ResponseMessage.BodyData.BodyAsJson = jsonConverter.Deserialize<object>(body, options);
                 break;
 
             default:

src/WireMock.Net.Minimal/ResponseBuilders/Response.cs

@@ -197,7 +197,7 @@ public partial class Response : IResponseBuilder
 
         if (ProxyAndRecordSettings != null && _httpClientForProxy != null)
         {
-            string RemoveFirstOccurrence(string source, string find)
+            static string RemoveFirstOccurrence(string source, string find)
             {
                 int place = source.IndexOf(find, StringComparison.OrdinalIgnoreCase);
                 return place >= 0 ? source.Remove(place, find.Length) : source;
@@ -265,7 +265,7 @@ public partial class Response : IResponseBuilder
                     var decoded = await protoBufMatcher.DecodeAsync(requestMessage.BodyData?.BodyAsBytes).ConfigureAwait(false);
                     if (decoded != null)
                     {
-                        requestMessageImplementation.BodyAsJson = JsonUtils.ConvertValueToJToken(decoded);
+                        requestMessageImplementation.BodyAsJson = settings.DefaultJsonSerializer.ToJsonToken(decoded);
                     }
                 }
             }

src/WireMock.Net.Minimal/Serialization/MappingConverter.cs

@@ -66,6 +66,12 @@ internal class MappingConverter(MatcherMapper mapper)
 
         // Request
         sb.AppendLine("    .Given(Request.Create()");
+
+        if (request.EarlyMatcherType != null)
+        {
+            sb.AppendLine($"        .WithEarlyMismatch({request.EarlyMatcherType.Value.GetFullyQualifiedEnumValue()})");
+        }
+
         sb.AppendLine($"        .UsingMethod({To1Or2Or3Arguments(methodMatcher?.MatchBehaviour, methodMatcher?.MatchOperator, methodMatcher?.Methods, HttpRequestMethod.GET)})");
 
         if (pathMatcher?.Matchers != null)
@@ -275,6 +281,7 @@ internal class MappingConverter(MatcherMapper mapper)
             TimesInSameState = !string.IsNullOrWhiteSpace(mapping.NextState) ? mapping.TimesInSameState : null,
             Data = mapping.Data,
             Probability = mapping.Probability,
+            IsDisabled = mapping.IsDisabled ? true : null,
             Request = new RequestModel
             {
                 Headers = headerMatchers.Any() ? headerMatchers.Select(hm => new HeaderModel
@@ -299,7 +306,9 @@ internal class MappingConverter(MatcherMapper mapper)
                     IgnoreCase = pm.IgnoreCase ? true : null,
                     RejectOnMatch = pm.MatchBehaviour == MatchBehaviour.RejectOnMatch ? true : null,
                     Matchers = _mapper.Map(pm.Matchers)
-                }).ToList() : null
+                }).ToList() : null,
+
+                EarlyMatcherType = request.EarlyMatcherType
             },
             Response = new ResponseModel()
         };

src/WireMock.Net.Minimal/Serialization/MappingSerializer.cs

@@ -1,10 +1,7 @@
 // Copyright © WireMock.Net
 
 using JsonConverter.Abstractions;
-using Newtonsoft.Json.Linq;
+using JsonConverter.Abstractions.Models;
-#if NETSTANDARD2_0_OR_GREATER || NETCOREAPP3_1_OR_GREATER || NET6_0_OR_GREATER || NET461
-using System.Text.Json;
-#endif
 
 namespace WireMock.Serialization;
 
@@ -12,37 +9,23 @@ internal class MappingSerializer(IJsonConverter jsonConverter)
 {
     internal T[] DeserializeJsonToArray<T>(string value)
     {
-        return DeserializeObjectToArray<T>(jsonConverter.Deserialize<object>(value)!);
+        switch (JsonTypeHelper.GetJsonType(value))
-    }
+        {
+            case JsonType.Array:
+                return jsonConverter.Deserialize<T[]>(value, JsonSerializationConstants.JsonConverterOptionsWithDateParsingNone)!;
 
-    internal static T[] DeserializeObjectToArray<T>(object value)
+            case JsonType.Object:
-    {
+                var singleResult = jsonConverter.Deserialize<T>(value, JsonSerializationConstants.JsonConverterOptionsWithDateParsingNone);
-        if (value is JArray jArray)
-        {
-            return jArray.ToObject<T[]>()!;
-        }
-
-        if (value is JObject jObject)
-        {
-            var singleResult = jObject.ToObject<T>();
                 return [singleResult!];
-        }
 
-#if NETSTANDARD2_0_OR_GREATER || NETCOREAPP3_1_OR_GREATER || NET6_0_OR_GREATER || NET461
+            default:
-        if (value is JsonElement jElement)
-        {
-            if (jElement.ValueKind == JsonValueKind.Array)
-            {
-                return jElement.Deserialize<T[]>()!;
-            }
-
-            if (jElement.ValueKind == JsonValueKind.Object)
-            {
-                var singleResult = jElement.Deserialize<T>();
-                return [singleResult!];
-            }
-        }
-#endif
                 throw new InvalidOperationException("Cannot deserialize the provided value to an array or object.");
         }
     }
+
+    internal T[] DeserializeObjectToArray<T>(object value)
+    {
+        var json = jsonConverter.Serialize(value, JsonSerializationConstants.JsonConverterOptionsWithDateParsingNone);
+        return DeserializeJsonToArray<T>(json);
+    }
+}

src/WireMock.Net.Minimal/Serialization/MatcherMapper.cs

@@ -106,9 +106,29 @@ internal class MatcherMapper
                 var valueForJsonPartialWildcardMatcher = matcherModel.Pattern ?? matcherModel.Patterns;
                 return new JsonPartialWildcardMatcher(matchBehaviour, valueForJsonPartialWildcardMatcher!, ignoreCase, useRegex);
 
+            case nameof(SystemTextJsonMatcher):
+                var valueForSystemTextJsonMatcher = matcherModel.Pattern ?? matcherModel.Patterns;
+                return new SystemTextJsonMatcher(matchBehaviour, valueForSystemTextJsonMatcher!, ignoreCase, useRegex);
+
+            case nameof(SystemTextJsonPartialMatcher):
+                var valueForSystemTextJsonPartialMatcher = matcherModel.Pattern ?? matcherModel.Patterns;
+                return new SystemTextJsonPartialMatcher(matchBehaviour, valueForSystemTextJsonPartialMatcher!, ignoreCase, useRegex);
+
+            case nameof(SystemTextJsonPartialWildcardMatcher):
+                var valueForSystemTextJsonPartialWildcardMatcher = matcherModel.Pattern ?? matcherModel.Patterns;
+                return new SystemTextJsonPartialWildcardMatcher(matchBehaviour, valueForSystemTextJsonPartialWildcardMatcher!, ignoreCase, useRegex);
+
             case nameof(JsonPathMatcher):
                 return new JsonPathMatcher(matchBehaviour, matchOperator, stringPatterns);
 
+            case "SystemTextJsonPathMatcher":
+                if (TypeLoader.TryLoadNewInstance<ISystemTextJsonPathMatcher>(out var systemTextJsonPathMatcher, matchBehaviour, matchOperator, stringPatterns))
+                {
+                    return systemTextJsonPathMatcher;
+                }
+
+                throw new InvalidOperationException("The 'SystemTextJsonPathMatcher' cannot be loaded. Please install the WireMock.Net.Matchers.SystemTextJsonPath package.");
+
             case nameof(JmesPathMatcher):
                 return new JmesPathMatcher(matchBehaviour, matchOperator, stringPatterns);
 
@@ -171,6 +191,10 @@ internal class MatcherMapper
                 model.Regex = jsonMatcher.Regex;
                 break;
 
+            case SystemTextJsonMatcher stjMatcher:
+                model.Regex = stjMatcher.Regex;
+                break;
+
             case XPathMatcher xpathMatcher:
                 model.XmlNamespaceMap = xpathMatcher.XmlNamespaceMap;
                 break;

src/WireMock.Net.Minimal/Serialization/PactMapper.cs

@@ -1,6 +1,8 @@
 // Copyright © WireMock.Net
 
 using System.Linq;
+using System.Text;
+using Newtonsoft.Json;
 using WireMock.Admin.Mappings;
 using WireMock.Extensions;
 using WireMock.Pact.Models.V2;
@@ -49,7 +51,7 @@ internal static class PactMapper
             pact.Interactions.Add(interaction);
         }
 
-        return (filename, JsonUtils.SerializeAsPactFile(pact));
+        return (filename, SerializeAsPactFile(pact));
     }
 
     private static PactRequest MapRequest(RequestModel request, string path)
@@ -152,7 +154,7 @@ internal static class PactMapper
     /// </summary>
     private static object? TryDeserializeJsonStringAsObject(string? value)
     {
-        return value != null ? JsonUtils.TryDeserializeObject<object?>(value) ?? value : null;
+        return value != null ? TryDeserializeObject<object?>(value) ?? value : null;
     }
 
     //private static string GetPatternAsStringFromMatchers(MatcherModel[]? matchers, string defaultValue)
@@ -164,4 +166,22 @@ internal static class PactMapper
 
     //    return defaultValue;
     //}
+
+    private static byte[] SerializeAsPactFile(object value)
+    {
+        var json = JsonConvert.SerializeObject(value, JsonSerializationConstants.JsonSerializerSettingsPact);
+        return Encoding.UTF8.GetBytes(json);
+    }
+
+    private static T? TryDeserializeObject<T>(string json)
+    {
+        try
+        {
+            return JsonConvert.DeserializeObject<T>(json);
+        }
+        catch
+        {
+            return default;
+        }
+    }
 }

src/WireMock.Net.Minimal/Serialization/SwaggerMapper.cs

@@ -1,7 +1,8 @@
 // Copyright © WireMock.Net
 
-using System.Linq;
+using System.Diagnostics.CodeAnalysis;
 using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
 using NJsonSchema;
 using NJsonSchema.Extensions;
 using NSwag;
@@ -281,7 +282,7 @@ internal static class SwaggerMapper
         if (matcher is { Name: nameof(JsonMatcher) })
         {
             var pattern = GetPatternAsStringFromMatcher(matcher);
-            if (JsonUtils.TryParseAsJObject(pattern, out var jObject))
+            if (TryParseAsJObject(pattern, out var jObject))
             {
                 return jObject;
             }
@@ -292,6 +293,39 @@ internal static class SwaggerMapper
         return null;
     }
 
+    private static bool IsJson(string? value)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+        {
+            return false;
+        }
+
+        value = value!.Trim();
+
+        return (value.StartsWith("{") && value.EndsWith("}")) || (value.StartsWith("[") && value.EndsWith("]"));
+    }
+
+    private static bool TryParseAsJObject(string? strInput, [NotNullWhen(true)] out JObject? value)
+    {
+        value = null;
+
+        if (!IsJson(strInput))
+        {
+            return false;
+        }
+
+        try
+        {
+            // Try to convert this string into a JObject
+            value = JObject.Parse(strInput!);
+            return true;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
     private static string GetContentType(RequestModel request)
     {
         var contentType = request.Headers?.FirstOrDefault(h => h.Name == "Content-Type");

src/WireMock.Net.Minimal/Server/IRespondWithAProvider.cs

@@ -234,6 +234,13 @@ public interface IRespondWithAProvider
     /// <returns>The <see cref="IRespondWithAProvider"/>.</returns>
     IRespondWithAProvider WithProbability(double probability);
 
+    /// <summary>
+    /// Define whether this mapping is disabled. Defaults to <c>false</c>.
+    /// </summary>
+    /// <param name="isDisabled">Whether this mapping is disabled.</param>
+    /// <returns>The <see cref="IRespondWithAProvider"/>.</returns>
+    IRespondWithAProvider WithIsDisabled(bool isDisabled);
+
     /// <summary>
     /// Define a Grpc ProtoDefinition which is used for the request and the response.
     /// This can be a ProtoDefinition as a string, or an id when the ProtoDefinitions are defined at the WireMockServer.

src/WireMock.Net.Minimal/Server/RespondWithAProvider.cs

@@ -37,6 +37,7 @@ internal class RespondWithAProvider : IRespondWithAProvider
     private int _timesInSameState = 1;
     private bool? _useWebhookFireAndForget;
     private double? _probability;
+    private bool _isDisabled = false;
     private GraphQLSchemaDetails? _graphQLSchemaDetails; // Future Use.
 
     public Guid Guid { get; private set; }
@@ -108,6 +109,11 @@ internal class RespondWithAProvider : IRespondWithAProvider
             mapping.WithProbability(_probability.Value);
         }
 
+        if (_isDisabled)
+        {
+            mapping.IsDisabled = true;
+        }
+
         if (ProtoDefinition != null)
         {
             mapping.WithProtoDefinition(ProtoDefinition.Value);
@@ -354,6 +360,13 @@ internal class RespondWithAProvider : IRespondWithAProvider
         return this;
     }
 
+    /// <inheritdoc />
+    public IRespondWithAProvider WithIsDisabled(bool isDisabled)
+    {
+        _isDisabled = isDisabled;
+        return this;
+    }
+
     /// <inheritdoc />
     public IRespondWithAProvider WithProtoDefinition(params string[] protoDefinitionOrId)
     {

src/WireMock.Net.Minimal/Server/WireMockServer.Admin.cs

@@ -1,6 +1,5 @@
 // Copyright © WireMock.Net
 
-using System.Linq;
 using System.Net;
 using System.Text;
 using JetBrains.Annotations;
@@ -26,9 +25,6 @@ using WireMock.Util;
 
 namespace WireMock.Server;
 
-/// <summary>
-/// The fluent mock server.
-/// </summary>
 public partial class WireMockServer
 {
     private const int EnhancedFileSystemWatcherTimeoutMs = 1000;
@@ -61,6 +57,8 @@ public partial class WireMockServer
         public string OpenApi => $"{_prefix}/openapi";
 
         public RegexMatcher MappingsGuidPathMatcher => new($"^{_prefixEscaped}\\/mappings\\/([0-9A-Fa-f]{{8}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{12}})$");
+        public RegexMatcher MappingsGuidEnablePathMatcher  => new($"^{_prefixEscaped}\\/mappings\\/([0-9A-Fa-f]{{8}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{12}})\\/enable$");
+        public RegexMatcher MappingsGuidDisablePathMatcher => new($"^{_prefixEscaped}\\/mappings\\/([0-9A-Fa-f]{{8}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{12}})\\/disable$");
         public RegexMatcher MappingsCodeGuidPathMatcher => new($"^{_prefixEscaped}\\/mappings\\/code\\/([0-9A-Fa-f]{{8}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{12}})$");
         public RegexMatcher RequestsGuidPathMatcher => new($"^{_prefixEscaped}\\/requests\\/([0-9A-Fa-f]{{8}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{4}}[-][0-9A-Fa-f]{{12}})$");
         public RegexMatcher ScenariosNameMatcher => new($"^{_prefixEscaped}\\/scenarios\\/.+$");
@@ -104,6 +102,12 @@ public partial class WireMockServer
         Given(Request.Create().WithPath(_adminPaths.MappingsGuidPathMatcher).UsingPut().WithHeader(HttpKnownHeaderNames.ContentType, AdminRequestContentTypeJson)).AtPriority(WireMockConstants.AdminPriority).RespondWith(new DynamicResponseProvider(MappingPut));
         Given(Request.Create().WithPath(_adminPaths.MappingsGuidPathMatcher).UsingDelete()).AtPriority(WireMockConstants.AdminPriority).RespondWith(new DynamicResponseProvider(MappingDelete));
 
+        // __admin/mappings/{guid}/enable
+        Given(Request.Create().WithPath(_adminPaths.MappingsGuidEnablePathMatcher).UsingPut()).AtPriority(WireMockConstants.AdminPriority).RespondWith(new DynamicResponseProvider(MappingEnable));
+
+        // __admin/mappings/{guid}/disable
+        Given(Request.Create().WithPath(_adminPaths.MappingsGuidDisablePathMatcher).UsingPut()).AtPriority(WireMockConstants.AdminPriority).RespondWith(new DynamicResponseProvider(MappingDisable));
+
         // __admin/mappings/code/{guid}
         Given(Request.Create().WithPath(_adminPaths.MappingsCodeGuidPathMatcher).UsingGet()).AtPriority(WireMockConstants.AdminPriority).RespondWith(new DynamicResponseProvider(MappingCodeGet));
 
@@ -430,6 +434,47 @@ public partial class WireMockServer
         var lastPart = requestMessage.Path.Split('/').LastOrDefault();
         return Guid.TryParse(lastPart, out guid);
     }
+
+    private static bool TryParseGuidFromSecondToLastSegment(IRequestMessage requestMessage, out Guid guid)
+    {
+        var parts = requestMessage.Path.Split('/');
+        if (parts.Length >= 2 && Guid.TryParse(parts[parts.Length - 2], out guid))
+            return true;
+        guid = Guid.Empty;
+        return false;
+    }
+
+    private IResponseMessage MappingEnable(HttpContext _, IRequestMessage requestMessage)
+    {
+        if (TryParseGuidFromSecondToLastSegment(requestMessage, out var guid))
+        {
+            var mapping = Mappings.FirstOrDefault(m => !m.IsAdminInterface && m.Guid == guid);
+            if (mapping != null)
+            {
+                mapping.IsDisabled = false;
+                return ResponseMessageBuilder.Create(HttpStatusCode.OK, "Mapping enabled", guid);
+            }
+        }
+
+        _settings.Logger.Warn("HttpStatusCode set to 404 : Mapping not found");
+        return ResponseMessageBuilder.Create(HttpStatusCode.NotFound, "Mapping not found");
+    }
+
+    private IResponseMessage MappingDisable(HttpContext _, IRequestMessage requestMessage)
+    {
+        if (TryParseGuidFromSecondToLastSegment(requestMessage, out var guid))
+        {
+            var mapping = Mappings.FirstOrDefault(m => !m.IsAdminInterface && m.Guid == guid);
+            if (mapping != null)
+            {
+                mapping.IsDisabled = true;
+                return ResponseMessageBuilder.Create(HttpStatusCode.OK, "Mapping disabled", guid);
+            }
+        }
+
+        _settings.Logger.Warn("HttpStatusCode set to 404 : Mapping not found");
+        return ResponseMessageBuilder.Create(HttpStatusCode.NotFound, "Mapping not found");
+    }
     #endregion Mapping/{guid}
 
     #region Mappings
@@ -838,6 +883,18 @@ public partial class WireMockServer
         };
     }
 
+    private T[] DeserializeRequestMessageToArray<T>(IRequestMessage requestMessage)
+    {
+        if (requestMessage.BodyData?.DetectedBodyType == BodyType.Json && requestMessage.BodyData.BodyAsJson != null)
+        {
+            var bodyAsJson = requestMessage.BodyData.BodyAsJson!;
+
+            return _mappingSerializer.DeserializeObjectToArray<T>(bodyAsJson);
+        }
+
+        throw new NotSupportedException();
+    }
+
     private static Encoding? ToEncoding(EncodingModel? encodingModel)
     {
         return encodingModel != null ? Encoding.GetEncoding(encodingModel.CodePage) : null;
@@ -857,28 +914,16 @@ public partial class WireMockServer
         };
     }
 
-    private static T[] DeserializeRequestMessageToArray<T>(IRequestMessage requestMessage)
+    private T DeserializeObject<T>(IRequestMessage requestMessage)
-    {
-        if (requestMessage.BodyData?.DetectedBodyType == BodyType.Json && requestMessage.BodyData.BodyAsJson != null)
-        {
-            var bodyAsJson = requestMessage.BodyData.BodyAsJson!;
-
-            return MappingSerializer.DeserializeObjectToArray<T>(bodyAsJson);
-        }
-
-        throw new NotSupportedException();
-    }
-
-    private static T DeserializeObject<T>(IRequestMessage requestMessage)
     {
         switch (requestMessage.BodyData?.DetectedBodyType)
         {
-            case BodyType.String:
+            case BodyType.String when requestMessage.BodyData?.BodyAsString != null:
-            case BodyType.FormUrlEncoded:
+            case BodyType.FormUrlEncoded when requestMessage.BodyData?.BodyAsString != null:
-                return JsonUtils.DeserializeObject<T>(requestMessage.BodyData.BodyAsString!);
+                return _settings.DefaultJsonSerializer.Deserialize<T>(requestMessage.BodyData.BodyAsString)!;
 
             case BodyType.Json when requestMessage.BodyData?.BodyAsJson != null:
-                return ((JObject)requestMessage.BodyData.BodyAsJson).ToObject<T>()!;
+                return _settings.DefaultJsonSerializer.ParseJsonToken<T>(requestMessage.BodyData.BodyAsJson)!;
 
             default:
                 throw new NotSupportedException();

src/WireMock.Net.Minimal/Server/WireMockServer.ConvertMapping.cs

@@ -1,6 +1,5 @@
 // Copyright © WireMock.Net
 
-using System.Linq;
 using Stef.Validation;
 using WireMock.Admin.Mappings;
 using WireMock.Matchers;
@@ -120,6 +119,11 @@ public partial class WireMockServer
             respondProvider.WithProbability(mappingModel.Probability.Value);
         }
 
+        if (mappingModel.IsDisabled == true)
+        {
+            respondProvider.WithIsDisabled(true);
+        }
+
         // ProtoDefinition is defined at Mapping level
         if (mappingModel.ProtoDefinition != null)
         {
@@ -148,7 +152,7 @@ public partial class WireMockServer
             }
             else
             {
-                var clientIPModel = JsonUtils.ParseJTokenToObject<ClientIPModel>(requestModel.ClientIP);
+                var clientIPModel = _settings.DefaultJsonSerializer.ParseJsonToken<ClientIPModel>(requestModel.ClientIP);
                 if (clientIPModel.Matchers != null)
                 {
                     requestBuilder = requestBuilder.WithPath(clientIPModel.Matchers.Select(_matcherMapper.Map).OfType<IStringMatcher>().ToArray());
@@ -164,7 +168,7 @@ public partial class WireMockServer
             }
             else
             {
-                var pathModel = JsonUtils.ParseJTokenToObject<PathModel>(requestModel.Path);
+                var pathModel = _settings.DefaultJsonSerializer.ParseJsonToken<PathModel>(requestModel.Path);
                 if (pathModel.Matchers != null)
                 {
                     var matchOperator = StringUtils.ParseMatchOperator(pathModel.MatchOperator);
@@ -180,7 +184,7 @@ public partial class WireMockServer
             }
             else
             {
-                var urlModel = JsonUtils.ParseJTokenToObject<UrlModel>(requestModel.Url);
+                var urlModel = _settings.DefaultJsonSerializer.ParseJsonToken<UrlModel>(requestModel.Url);
                 if (urlModel.Matchers != null)
                 {
                     var matchOperator = StringUtils.ParseMatchOperator(urlModel.MatchOperator);
@@ -263,10 +267,12 @@ public partial class WireMockServer
             }
         }
 
+        requestBuilder = requestBuilder.WithEarlyMismatch(requestModel.EarlyMatcherType);
+
         return requestBuilder;
     }
 
-    private static IResponseBuilder InitResponseBuilder(ResponseModel responseModel)
+    private IResponseBuilder InitResponseBuilder(ResponseModel responseModel)
     {
         var responseBuilder = Response.Create();
 
@@ -331,7 +337,7 @@ public partial class WireMockServer
                 }
                 else
                 {
-                    var headers = JsonUtils.ParseJTokenToObject<string[]>(entry.Value);
+                    var headers = _settings.DefaultJsonSerializer.ParseJsonToken<string[]>(entry.Value);
                     responseBuilder.WithHeader(entry.Key, headers);
                 }
             }
@@ -357,7 +363,7 @@ public partial class WireMockServer
                 }
                 else
                 {
-                    var headers = JsonUtils.ParseJTokenToObject<string[]>(entry.Value);
+                    var headers = _settings.DefaultJsonSerializer.ParseJsonToken<string[]>(entry.Value);
                     responseBuilder.WithTrailingHeader(entry.Key, headers);
                 }
             }

src/WireMock.Net.Minimal/Server/WireMockServer.cs

@@ -414,6 +414,7 @@ public partial class WireMockServer : IWireMockServer
         _options.CorsPolicyOptions = _settings.CorsPolicyOptions;
         _options.ClientCertificateMode = (Microsoft.AspNetCore.Server.Kestrel.Https.ClientCertificateMode)_settings.ClientCertificateMode;
         _options.AcceptAnyClientCertificate = _settings.AcceptAnyClientCertificate;
+        _options.DefaultJsonSerializer = _settings.DefaultJsonSerializer;
 
         _httpServer = new AspNetCoreSelfHost(_options, urlOptions);
         var startTask = _httpServer.StartAsync();

src/WireMock.Net.Minimal/Settings/WireMockServerSettingsParser.cs

@@ -3,12 +3,14 @@
 using System.Collections;
 using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
-using System.Linq;
 using JetBrains.Annotations;
+using JsonConverter.Newtonsoft.Json;
+using JsonConverter.System.Text.Json;
 using Stef.Validation;
 using WireMock.Constants;
 using WireMock.Logging;
 using WireMock.Models;
+using WireMock.Transformers;
 using WireMock.Types;
 using WireMock.Util;
 
@@ -57,11 +59,9 @@ public static class WireMockServerSettingsParser
             DisableRequestBodyDecompressing = parser.GetBoolValue(nameof(WireMockServerSettings.DisableRequestBodyDecompressing)),
             DisableDeserializeFormUrlEncoded = parser.GetBoolValue(nameof(WireMockServerSettings.DisableDeserializeFormUrlEncoded)),
             DoNotSaveDynamicResponseInLogEntry = parser.GetBoolValue(nameof(WireMockServerSettings.DoNotSaveDynamicResponseInLogEntry)),
-            GraphQLSchemas = parser.GetObjectValueFromJson<Dictionary<string, GraphQLSchemaDetails>>(nameof(settings.GraphQLSchemas)),
             HandleRequestsSynchronously = parser.GetBoolValue(nameof(WireMockServerSettings.HandleRequestsSynchronously)),
             HostingScheme = parser.GetEnumValue<HostingScheme>(nameof(WireMockServerSettings.HostingScheme)),
             MaxRequestLogCount = parser.GetIntValue(nameof(WireMockServerSettings.MaxRequestLogCount)),
-            ProtoDefinitions = parser.GetObjectValueFromJson<Dictionary<string, string[]>>(nameof(settings.ProtoDefinitions)),
             QueryParameterMultipleValueSupport = parser.GetEnumValue<QueryParameterMultipleValueSupport>(nameof(WireMockServerSettings.QueryParameterMultipleValueSupport)),
             ReadStaticMappings = parser.GetBoolValue(nameof(WireMockServerSettings.ReadStaticMappings)),
             RequestLogExpirationDuration = parser.GetIntValue(nameof(WireMockServerSettings.RequestLogExpirationDuration)),
@@ -80,6 +80,7 @@ public static class WireMockServerSettingsParser
         settings.AcceptAnyClientCertificate = parser.GetBoolValue(nameof(WireMockServerSettings.AcceptAnyClientCertificate));
 #endif
 
+        ParseJsonSerializerSettings(settings, parser);
         ParseLoggerSettings(settings, logger, parser);
         ParsePortSettings(settings, parser);
         ParseProxyAndRecordSettings(settings, parser);
@@ -88,6 +89,9 @@ public static class WireMockServerSettingsParser
         ParseActivityTracingSettings(settings, parser);
         ParseWebSocketSettings(settings, parser);
 
+        settings.GraphQLSchemas = parser.GetObjectValueFromJson<Dictionary<string, GraphQLSchemaDetails>>(nameof(settings.GraphQLSchemas), settings.DefaultJsonSerializer);
+        settings.ProtoDefinitions = parser.GetObjectValueFromJson<Dictionary<string, string[]>>(nameof(settings.ProtoDefinitions), settings.DefaultJsonSerializer);
+
         return true;
     }
 
@@ -259,4 +263,21 @@ public static class WireMockServerSettingsParser
             };
         }
     }
+
+    private static void ParseJsonSerializerSettings(WireMockServerSettings settings, SimpleSettingsParser parser)
+    {
+        var defaultJsonSerializer = parser.GetStringValue(nameof(WireMockServerSettings.DefaultJsonSerializer));
+        settings.DefaultJsonSerializer = defaultJsonSerializer switch
+        {
+            nameof(SystemTextJsonConverter) => new SystemTextJsonConverter(),
+            _ => new NewtonsoftJsonConverter(),
+        };
+
+        var defaultJsonBodyTransformer = parser.GetStringValue(nameof(WireMockServerSettings.DefaultJsonBodyTransformer));
+        settings.DefaultJsonBodyTransformer = defaultJsonBodyTransformer switch
+        {
+            nameof(SystemTextJsonBodyTransformer) => new SystemTextJsonBodyTransformer(settings),
+            _ => new NewtonsoftJsonBodyTransformer(settings),
+        };
+    }
 }

src/WireMock.Net.Minimal/Transformers/Handlebars/IHandlebarsContext.cs

@@ -1,6 +1,7 @@
 // Copyright © WireMock.Net
 
 using HandlebarsDotNet;
+using WireMock.Transformers;
 
 namespace WireMock.Transformers.Handlebars;
 

src/WireMock.Net.Minimal/Transformers/ITransformerContext.cs

@@ -1,14 +0,0 @@
-// Copyright © WireMock.Net
-
-using WireMock.Handlers;
-
-namespace WireMock.Transformers;
-
-internal interface ITransformerContext
-{
-    IFileSystemHandler FileSystemHandler { get; }
-
-    string ParseAndRender(string text, object model);
-
-    object? ParseAndEvaluate(string text, object model);
-}

src/WireMock.Net.Minimal/Transformers/Transformer.cs

@@ -1,10 +1,5 @@
 // Copyright © WireMock.Net
 
-using System.Collections;
-using System.Linq;
-using HandlebarsDotNet.Helpers.Models;
-using Newtonsoft.Json;
-using Newtonsoft.Json.Linq;
 using Stef.Validation;
 using WireMock.Settings;
 using WireMock.Types;
@@ -14,17 +9,13 @@ namespace WireMock.Transformers;
 
 internal class Transformer : ITransformer
 {
-    private readonly JsonSerializer _jsonSerializer;
+    private readonly IJsonBodyTransformer _jsonBodyTransformer;
     private readonly ITransformerContextFactory _factory;
 
     public Transformer(WireMockServerSettings settings, ITransformerContextFactory factory)
     {
         _factory = Guard.NotNull(factory);
-
+        _jsonBodyTransformer = Guard.NotNull(settings).DefaultJsonBodyTransformer;
-        _jsonSerializer = new JsonSerializer
-        {
-            Culture = Guard.NotNull(settings).Culture
-        };
     }
 
     public IBodyData? TransformBody(
@@ -121,13 +112,17 @@ internal class Transformer : ITransformer
         });
     }
 
-    private IBodyData? TransformBodyData(ITransformerContext transformerContext, ReplaceNodeOptions options, TransformModel model, IBodyData original, bool useTransformerForBodyAsFile)
+    private BodyData? TransformBodyData(ITransformerContext transformerContext, ReplaceNodeOptions options, TransformModel model, IBodyData original, bool useTransformerForBodyAsFile)
     {
         switch (original.DetectedBodyType)
         {
             case BodyType.Json:
             case BodyType.ProtoBuf:
-                return TransformBodyAsJson(transformerContext, options, model, original);
+                return _jsonBodyTransformer.TransformBodyAsJson(
+                    transformerContext,
+                    options,
+                    model,
+                    original);
 
             case BodyType.File:
                 return TransformBodyAsFile(transformerContext, model, original, useTransformerForBodyAsFile);
@@ -159,185 +154,7 @@ internal class Transformer : ITransformer
         return newHeaders;
     }
 
-    private IBodyData TransformBodyAsJson(ITransformerContext transformerContext, ReplaceNodeOptions options, object model, IBodyData original)
+    private static BodyData TransformBodyAsString(ITransformerContext transformerContext, object model, IBodyData original)
-    {
-        JToken? jToken = null;
-        switch (original.BodyAsJson)
-        {
-            case JObject bodyAsJObject:
-                jToken = bodyAsJObject.DeepClone();
-                WalkNode(transformerContext, options, jToken, model);
-                break;
-
-            case JArray bodyAsJArray:
-                jToken = bodyAsJArray.DeepClone();
-                WalkNode(transformerContext, options, jToken, model);
-                break;
-
-            case var bodyAsEnumerable when bodyAsEnumerable is IEnumerable and not string:
-                jToken = JArray.FromObject(bodyAsEnumerable, _jsonSerializer);
-                WalkNode(transformerContext, options, jToken, model);
-                break;
-
-            case string bodyAsString:
-                jToken = ReplaceSingleNode(transformerContext, options, bodyAsString, model);
-                break;
-
-            case not null:
-                jToken = JObject.FromObject(original.BodyAsJson, _jsonSerializer);
-                WalkNode(transformerContext, options, jToken, model);
-                break;
-        }
-
-        return new BodyData
-        {
-            Encoding = original.Encoding,
-            DetectedBodyType = original.DetectedBodyType,
-            DetectedBodyTypeFromContentType = original.DetectedBodyTypeFromContentType,
-            ProtoDefinition = original.ProtoDefinition,
-            ProtoBufMessageType = original.ProtoBufMessageType,
-            BodyAsJson = jToken
-        };
-    }
-
-    private JToken ReplaceSingleNode(ITransformerContext transformerContext, ReplaceNodeOptions options, string stringValue, object model)
-    {
-        var transformedString = transformerContext.ParseAndRender(stringValue, model);
-
-        if (!string.Equals(stringValue, transformedString))
-        {
-            const string property = "_";
-            JObject dummy = JObject.Parse($"{{ \"{property}\": null }}");
-            if (dummy[property] == null)
-            {
-                // TODO: check if just returning null is fine
-                return string.Empty;
-            }
-
-            JToken node = dummy[property]!;
-
-            ReplaceNodeValue(options, node, transformedString);
-
-            return dummy[property]!;
-        }
-
-        return stringValue;
-    }
-
-    private void WalkNode(ITransformerContext transformerContext, ReplaceNodeOptions options, JToken node, object model)
-    {
-        switch (node.Type)
-        {
-            case JTokenType.Object:
-                // In case of Object, loop all children. Do a ToArray() to avoid `Collection was modified` exceptions.
-                foreach (var child in node.Children<JProperty>().ToArray())
-                {
-                    WalkNode(transformerContext, options, child.Value, model);
-                }
-                break;
-
-            case JTokenType.Array:
-                // In case of Array, loop all items. Do a ToArray() to avoid `Collection was modified` exceptions.
-                foreach (var child in node.Children().ToArray())
-                {
-                    WalkNode(transformerContext, options, child, model);
-                }
-                break;
-
-            case JTokenType.String:
-                // In case of string, try to transform the value.
-                var stringValue = node.Value<string>();
-                if (string.IsNullOrEmpty(stringValue))
-                {
-                    return;
-                }
-
-                var transformed = transformerContext.ParseAndEvaluate(stringValue!, model);
-                if (!Equals(stringValue, transformed))
-                {
-                    ReplaceNodeValue(options, node, transformed);
-                }
-                break;
-        }
-    }
-
-    // ReSharper disable once UnusedParameter.Local
-    private void ReplaceNodeValue(ReplaceNodeOptions options, JToken node, object? transformedValue)
-    {
-        switch (transformedValue)
-        {
-            case JValue jValue:
-                node.Replace(jValue);
-                return;
-
-            case string transformedString:
-                var (isConvertedFromString, convertedValueFromString) = TryConvert(options, transformedString);
-                if (isConvertedFromString)
-                {
-                    node.Replace(JToken.FromObject(convertedValueFromString, _jsonSerializer));
-                }
-                else
-                {
-                    node.Replace(ParseAsJObject(transformedString));
-                }
-                break;
-
-            case WireMockList<string> strings:
-                switch (strings.Count)
-                {
-                    case 1:
-                        node.Replace(ParseAsJObject(strings[0]));
-                        return;
-
-                    case > 1:
-                        node.Replace(JToken.FromObject(strings.ToArray(), _jsonSerializer));
-                        return;
-                }
-                break;
-
-            case { }:
-                var (isConverted, convertedValue) = TryConvert(options, transformedValue);
-                if (isConverted)
-                {
-                    node.Replace(JToken.FromObject(convertedValue, _jsonSerializer));
-                }
-                return;
-
-            default: // It's null, skip it. Maybe remove it ?
-                return;
-        }
-    }
-
-    private static JToken ParseAsJObject(string stringValue)
-    {
-        return JsonUtils.TryParseAsJObject(stringValue, out var parsedAsjObject) ? parsedAsjObject : stringValue;
-    }
-
-    private static (bool IsConverted, object ConvertedValue) TryConvert(ReplaceNodeOptions options, object value)
-    {
-        var valueAsString = value as string;
-
-        if (options == ReplaceNodeOptions.Evaluate)
-        {
-            if (valueAsString != null && WrappedString.TryDecode(valueAsString, out var decoded))
-            {
-                return (true, decoded);
-            }
-
-            return (false, value);
-        }
-
-        if (valueAsString != null)
-        {
-            return WrappedString.TryDecode(valueAsString, out var decoded) ?
-                (true, decoded) :
-                StringUtils.TryConvertToKnownType(valueAsString);
-        }
-
-        return (false, value);
-    }
-
-    private static IBodyData TransformBodyAsString(ITransformerContext transformerContext, object model, IBodyData original)
     {
         return new BodyData
         {
@@ -348,7 +165,7 @@ internal class Transformer : ITransformer
         };
     }
 
-    private static IBodyData TransformBodyAsFile(ITransformerContext transformerContext, object model, IBodyData original, bool useTransformerForBodyAsFile)
+    private static BodyData TransformBodyAsFile(ITransformerContext transformerContext, object model, IBodyData original, bool useTransformerForBodyAsFile)
     {
         var transformedBodyAsFilename = transformerContext.ParseAndRender(original.BodyAsFile!, model);
 

src/WireMock.Net.Minimal/WireMock.Net.Minimal.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <Description>Minimal version from the lightweight Http Mocking Server for .NET</Description>
         <AssemblyTitle>WireMock.Net.Minimal</AssemblyTitle>

src/WireMock.Net.NUnit/WireMock.Net.NUnit.csproj

@@ -25,7 +25,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="JsonConverter.Newtonsoft.Json" Version="0.8.0" />
+        <PackageReference Include="JsonConverter.Newtonsoft.Json" Version="0.11.0" />
         <PackageReference Include="NUnit" Version="4.4.0" />
         <PackageReference Include="Stef.Validation" Version="0.2.0" />
     </ItemGroup>

src/WireMock.Net.OpenTelemetry/WireMock.Net.OpenTelemetry.csproj

@@ -25,9 +25,9 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.14.0" />
+        <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.15.3" />
-        <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.14.0" />
+        <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.15.2" />
-        <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.14.0" />
+        <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.15.3" />
     </ItemGroup>
 
     <ItemGroup>

src/WireMock.Net.RestClient.AwesomeAssertions/Assertions/WireMockAdminApiAssertions.WithBody.cs

@@ -32,15 +32,15 @@ public partial class WireMockAdminApiAssertions
     }
 
     [CustomAssertion]
-    public AndConstraint<WireMockAdminApiAssertions> WithBodyAsJson(object body, string because = "", params object[] becauseArgs)
+    public AndConstraint<WireMockAdminApiAssertions> WithBodyAsJson(object body, IJsonMatcher? jsonMatcher = null, string because = "", params object[] becauseArgs)
     {
-        return WithBodyAsJson(new JsonMatcher(body), because, becauseArgs);
+        return WithBodyAsJson(jsonMatcher ?? new JsonMatcher(body), because, becauseArgs);
     }
 
     [CustomAssertion]
-    public AndConstraint<WireMockAdminApiAssertions> WithBodyAsJson(string body, string because = "", params object[] becauseArgs)
+    public AndConstraint<WireMockAdminApiAssertions> WithBodyAsJson(string body, IJsonMatcher? jsonMatcher = null, string because = "", params object[] becauseArgs)
     {
-        return WithBodyAsJson(new JsonMatcher(body), because, becauseArgs);
+        return WithBodyAsJson(jsonMatcher ?? new JsonMatcher(body), because, becauseArgs);
     }
 
     [CustomAssertion]
@@ -127,15 +127,44 @@ public partial class WireMockAdminApiAssertions
 
     private static string? FormatBody(object? body)
     {
-        return body switch
+        if (body == null)
         {
-            null => null,
+            return null;
-            string str => str,
+        }
-            AnyOf<string, StringPattern>[] stringPatterns => FormatBodies(stringPatterns.Select(p => p.GetPattern())),
+
-            byte[] bytes => $"byte[{bytes.Length}] {{...}}",
+        if (body is string str)
-            JToken jToken => jToken.ToString(Formatting.None),
+        {
-            _ => JToken.FromObject(body).ToString(Formatting.None)
+            return str;
-        };
+        }
+
+        if (body is AnyOf<string, StringPattern>[] stringPatterns)
+        {
+            return FormatBodies(stringPatterns.Select(p => p.GetPattern()));
+        }
+
+        if (body is byte[] bytes)
+        {
+            return $"byte[{bytes.Length}] {{...}}";
+        }
+
+        if (body is JToken jToken)
+        {
+            return jToken.ToString(Formatting.None);
+        }
+
+        // System.IO.FileNotFoundException : Could not load file or assembly 'System.Text.Json, Version=10.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified.
+        var typeName = body.GetType().FullName;
+        if (typeName == "System.Text.Json.JsonElement")
+        {
+            return ((dynamic)body).GetRawText();
+        }
+
+        if (typeName == "System.Text.Json.JsonDocument")
+        {
+            return ((dynamic)body).RootElement.GetRawText();
+        }
+
+        return JToken.FromObject(body).ToString(Formatting.None);
     }
 
     private static string? FormatBodies(IEnumerable<object?> bodies)

src/WireMock.Net.RestClient/IWireMockAdminApi.cs

@@ -163,6 +163,22 @@ public interface IWireMockAdminApi
     [Header("Content-Type", "application/json")]
     Task<StatusModel> PutMappingAsync([Path] Guid guid, [Body] MappingModel mapping, CancellationToken cancellationToken = default);
 
+    /// <summary>
+    /// Enable a mapping based on the guid.
+    /// </summary>
+    /// <param name="guid">The Guid.</param>
+    /// <param name="cancellationToken">The optional cancellationToken.</param>
+    [Put("mappings/{guid}/enable")]
+    Task<StatusModel> EnableMappingAsync([Path] Guid guid, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// Disable a mapping based on the guid.
+    /// </summary>
+    /// <param name="guid">The Guid.</param>
+    /// <param name="cancellationToken">The optional cancellationToken.</param>
+    [Put("mappings/{guid}/disable")]
+    Task<StatusModel> DisableMappingAsync([Path] Guid guid, CancellationToken cancellationToken = default);
+
     /// <summary>
     /// Delete a mapping based on the guid
     /// </summary>

src/WireMock.Net.RestClient/WireMock.Net.RestClient.csproj

@@ -33,7 +33,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="JsonConverter.Newtonsoft.Json" Version="0.8.0" />
+        <PackageReference Include="JsonConverter.Newtonsoft.Json" Version="0.11.0" />
         <PackageReference Include="RestEase" Version="1.6.4" />
         <PackageReference Include="Stef.Validation" Version="0.2.0" />
     </ItemGroup>

src/WireMock.Net.Shared/IMapping.cs

@@ -108,6 +108,14 @@ public interface IMapping
     /// </value>
     bool IsProxy { get; }
 
+    /// <summary>
+    /// Gets a value indicating whether this mapping is disabled.
+    /// </summary>
+    /// <value>
+    /// <c>true</c> if this mapping is disabled; otherwise, <c>false</c>.
+    /// </value>
+    bool IsDisabled { get; set; }
+
     /// <summary>
     /// Gets a value indicating whether this mapping to be logged.
     /// </summary>

src/WireMock.Net.Shared/Matchers/IJsonPathMatcher.cs

@@ -0,0 +1,11 @@
+// Copyright © WireMock.Net
+
+namespace WireMock.Matchers;
+
+/// <summary>
+/// IJsonPathMatcher
+/// <seealso cref="IStringMatcher"/> and <seealso cref="IObjectMatcher"/>.
+/// </summary>
+public interface IJsonPathMatcher : IStringMatcher, IObjectMatcher
+{
+}

src/WireMock.Net.Shared/Matchers/ISystemTextJsonPathMatcher.cs

@@ -0,0 +1,11 @@
+// Copyright © WireMock.Net
+
+namespace WireMock.Matchers;
+
+/// <summary>
+/// ISystemTextJsonPathMatcher
+/// <seealso cref="IJsonPathMatcher"/>.
+/// </summary>
+public interface ISystemTextJsonPathMatcher : IJsonPathMatcher
+{
+}

src/WireMock.Net.Shared/Matchers/Request/RequestMessageGraphQLMatcher.cs

@@ -69,6 +69,9 @@ public class RequestMessageGraphQLMatcher : IRequestMatcher
         MatchOperator = matchOperator;
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.GraphQL;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {

src/WireMock.Net.Shared/Matchers/Request/RequestMessageProtoBufMatcher.cs

@@ -30,6 +30,9 @@ public class RequestMessageProtoBufMatcher : IRequestMatcher
         }
     }
 
+    /// <inheritdoc />
+    public RequestMatcherType Type => RequestMatcherType.ProtoBuf;
+
     /// <inheritdoc />
     public double GetMatchingScore(IRequestMessage requestMessage, IRequestMatchResult requestMatchResult)
     {

src/WireMock.Net.Shared/Properties/AssemblyInfo.cs

@@ -7,6 +7,7 @@ using System.Runtime.CompilerServices;
 [assembly: InternalsVisibleTo("WireMock.Net.GraphQL, PublicKey=0024000004800000940000000602000000240000525341310004000001000100e138ec44d93acac565953052636eb8d5e7e9f27ddb030590055cd1a0ab2069a5623f1f77ca907d78e0b37066ca0f6d63da7eecc3fcb65b76aa8ebeccf7ebe1d11264b8404cd9b1cbbf2c83f566e033b3e54129f6ef28daffff776ba7aebbc53c0d635ebad8f45f78eb3f7e0459023c218f003416e080f96a1a3c5ffeb56bee9e")]
 [assembly: InternalsVisibleTo("WireMock.Net.ProtoBuf, PublicKey=0024000004800000940000000602000000240000525341310004000001000100e138ec44d93acac565953052636eb8d5e7e9f27ddb030590055cd1a0ab2069a5623f1f77ca907d78e0b37066ca0f6d63da7eecc3fcb65b76aa8ebeccf7ebe1d11264b8404cd9b1cbbf2c83f566e033b3e54129f6ef28daffff776ba7aebbc53c0d635ebad8f45f78eb3f7e0459023c218f003416e080f96a1a3c5ffeb56bee9e")]
 [assembly: InternalsVisibleTo("WireMock.Net.Matchers.CSharpCode, PublicKey=0024000004800000940000000602000000240000525341310004000001000100e138ec44d93acac565953052636eb8d5e7e9f27ddb030590055cd1a0ab2069a5623f1f77ca907d78e0b37066ca0f6d63da7eecc3fcb65b76aa8ebeccf7ebe1d11264b8404cd9b1cbbf2c83f566e033b3e54129f6ef28daffff776ba7aebbc53c0d635ebad8f45f78eb3f7e0459023c218f003416e080f96a1a3c5ffeb56bee9e")]
+[assembly: InternalsVisibleTo("WireMock.Net.Matchers.SystemTextJsonPath, PublicKey=0024000004800000940000000602000000240000525341310004000001000100e138ec44d93acac565953052636eb8d5e7e9f27ddb030590055cd1a0ab2069a5623f1f77ca907d78e0b37066ca0f6d63da7eecc3fcb65b76aa8ebeccf7ebe1d11264b8404cd9b1cbbf2c83f566e033b3e54129f6ef28daffff776ba7aebbc53c0d635ebad8f45f78eb3f7e0459023c218f003416e080f96a1a3c5ffeb56bee9e")]
 [assembly: InternalsVisibleTo("WireMock.Net.OpenTelemetry, PublicKey=0024000004800000940000000602000000240000525341310004000001000100e138ec44d93acac565953052636eb8d5e7e9f27ddb030590055cd1a0ab2069a5623f1f77ca907d78e0b37066ca0f6d63da7eecc3fcb65b76aa8ebeccf7ebe1d11264b8404cd9b1cbbf2c83f566e033b3e54129f6ef28daffff776ba7aebbc53c0d635ebad8f45f78eb3f7e0459023c218f003416e080f96a1a3c5ffeb56bee9e")]
 // [assembly: InternalsVisibleTo("WireMock.Net.StandAlone, PublicKey=0024000004800000940000000602000000240000525341310004000001000100e138ec44d93acac565953052636eb8d5e7e9f27ddb030590055cd1a0ab2069a5623f1f77ca907d78e0b37066ca0f6d63da7eecc3fcb65b76aa8ebeccf7ebe1d11264b8404cd9b1cbbf2c83f566e033b3e54129f6ef28daffff776ba7aebbc53c0d635ebad8f45f78eb3f7e0459023c218f003416e080f96a1a3c5ffeb56bee9e")]
 [assembly: InternalsVisibleTo("WireMock.Net.Tests, PublicKey=0024000004800000940000000602000000240000525341310004000001000100e138ec44d93acac565953052636eb8d5e7e9f27ddb030590055cd1a0ab2069a5623f1f77ca907d78e0b37066ca0f6d63da7eecc3fcb65b76aa8ebeccf7ebe1d11264b8404cd9b1cbbf2c83f566e033b3e54129f6ef28daffff776ba7aebbc53c0d635ebad8f45f78eb3f7e0459023c218f003416e080f96a1a3c5ffeb56bee9e")]

src/WireMock.Net.Shared/RequestBuilders/IRequestBuilder.cs

@@ -10,7 +10,8 @@ namespace WireMock.RequestBuilders;
 public interface IRequestBuilder : IClientIPRequestBuilder
 {
     /// <summary>
-    /// Adds a request matcher to the builder.
+    /// Adds a request matcher to the builder.<br/>
+    /// If the request matcher is already present, it will be replaced.
     /// </summary>
     /// <typeparam name="T">The type of the request matcher.</typeparam>
     /// <param name="requestMatcher">The request matcher to add.</param>
@@ -21,4 +22,11 @@ public interface IRequestBuilder : IClientIPRequestBuilder
     /// The link back to the Mapping.
     /// </summary>
     IMapping Mapping { get; set; }
+
+    /// <summary>
+    /// Chooses the <see cref="IRequestMatcher"/> which immediately returns a mismatch during mappings enumeration.
+    /// </summary>
+    /// <param name="earlyMatcherType">Selected type to choose the matcher from available list.</param>
+    /// <returns>The current <see cref="IRequestBuilder"/> instance.</returns>
+    IRequestBuilder WithEarlyMismatch(RequestMatcherType? earlyMatcherType);
 }

src/WireMock.Net.Shared/ResponseBuilders/IBodyResponseBuilder.cs

@@ -1,8 +1,6 @@
 // Copyright © WireMock.Net
 
-using System;
 using System.Text;
-using System.Threading.Tasks;
 using JsonConverter.Abstractions;
 using WireMock.Models;
 
@@ -19,8 +17,10 @@ public interface IBodyResponseBuilder : IFaultResponseBuilder
     /// <param name="body">The body.</param>
     /// <param name="destination">The Body Destination format (SameAsSource, String or Bytes).</param>
     /// <param name="encoding">The body encoding.</param>
+    /// <param name="jsonConverter">The JSON converter.</param>
+    /// <param name="options">The JSON converter options.</param>
     /// <returns>A <see cref="IResponseBuilder"/>.</returns>
-    IResponseBuilder WithBody(string body, string? destination = BodyDestinationFormat.SameAsSource, Encoding? encoding = null);
+    IResponseBuilder WithBody(string body, string? destination = BodyDestinationFormat.SameAsSource, Encoding? encoding = null, IJsonConverter? jsonConverter = null, JsonConverterOptions? options = null);
 
     /// <summary>
     /// WithBody : Create a ... response based on a callback function.

src/WireMock.Net.Shared/Serialization/JsonSerializationConstants.cs

@@ -14,16 +14,16 @@ internal static class JsonSerializationConstants
         IgnoreNullValues = true
     };
 
-    //internal static readonly JsonSerializerSettings JsonSerializerSettingsDefault = new()
+    internal static readonly JsonConverterOptions JsonConverterOptionsIncludeNullValues = new()
-    //{
-    //    Formatting = Formatting.Indented,
-    //    NullValueHandling = NullValueHandling.Ignore
-    //};
-
-    internal static readonly JsonSerializerSettings JsonSerializerSettingsIncludeNullValues = new()
     {
-        Formatting = Formatting.Indented,
+        WriteIndented = true,
-        NullValueHandling = NullValueHandling.Include
+        IgnoreNullValues = false
+    };
+
+    internal static readonly JsonConverterOptions JsonConverterOptionsWithDateParsingNone = new()
+    {
+        WriteIndented = true,
+        DateParseHandling = 0
     };
 
     internal static readonly JsonSerializerSettings JsonDeserializerSettingsWithDateParsingNone = new()

src/WireMock.Net.Shared/Settings/SimpleSettingsParser.cs

@@ -1,6 +1,7 @@
 // Copyright © WireMock.Net
 
 using System.Collections;
+using JsonConverter.Abstractions;
 using WireMock.Extensions;
 using WireMock.Util;
 
@@ -191,9 +192,9 @@ internal class SimpleSettingsParser
         return GetValue(name, values => values.FirstOrDefault());
     }
 
-    public T? GetObjectValueFromJson<T>(string name)
+    public T? GetObjectValueFromJson<T>(string name, IJsonConverter jsonConverter)
     {
         var value = GetValue(name, values => values.FirstOrDefault());
-        return string.IsNullOrWhiteSpace(value) ? default : JsonUtils.DeserializeObject<T>(value!);
+        return string.IsNullOrWhiteSpace(value) ? default : jsonConverter.Deserialize<T>(value!);
     }
 }

src/WireMock.Net.Shared/Settings/WireMockServerSettings.cs

@@ -14,6 +14,7 @@ using WireMock.Logging;
 using WireMock.Matchers;
 using WireMock.Models;
 using WireMock.RegularExpressions;
+using WireMock.Transformers;
 using WireMock.Types;
 
 namespace WireMock.Settings;
@@ -362,11 +363,31 @@ public class WireMockServerSettings
     /// Default is <see cref="NewtonsoftJsonConverter"/>.
     /// </remarks>
     [PublicAPI]
-    public IJsonConverter DefaultJsonSerializer { get; set; } = new NewtonsoftJsonConverter();
+    public IJsonConverter DefaultJsonSerializer { get; set; }
+
+    /// <summary>
+    /// Gets or sets the default JSON body transformer used for template-based JSON body transformations.
+    /// </summary>
+    /// <remarks>
+    /// Set this property to provide a custom implementation for transforming JSON and ProtoBuf body content.
+    /// Default is <see cref="NewtonsoftJsonBodyTransformer"/>.
+    /// </remarks>
+    [PublicAPI]
+    [JsonIgnore]
+    public IJsonBodyTransformer DefaultJsonBodyTransformer { get; set; }
 
     /// <summary>
     /// WebSocket settings.
     /// </summary>
     [PublicAPI]
     public WebSocketSettings? WebSocketSettings { get; set; }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="WireMockServerSettings"/> class.
+    /// </summary>
+    public WireMockServerSettings()
+    {
+        DefaultJsonSerializer = new NewtonsoftJsonConverter();
+        DefaultJsonBodyTransformer = new NewtonsoftJsonBodyTransformer(this);
+    }
 }

src/WireMock.Net.Shared/Transformers/IJsonBodyTransformer.cs

@@ -0,0 +1,28 @@
+// Copyright © WireMock.Net
+
+using JetBrains.Annotations;
+using WireMock.Types;
+using WireMock.Util;
+
+namespace WireMock.Transformers;
+
+/// <summary>
+/// Defines the contract for transforming JSON-like body data using a transformer context.
+/// </summary>
+[PublicAPI]
+public interface IJsonBodyTransformer
+{
+    /// <summary>
+    /// Transforms the JSON body using the provided transformer context and model.
+    /// </summary>
+    /// <param name="transformerContext">The transformer context used to render and evaluate template values.</param>
+    /// <param name="options">The JSON node replacement behavior to apply during transformation.</param>
+    /// <param name="model">The model used when rendering or evaluating template values.</param>
+    /// <param name="original">The original body data to transform.</param>
+    /// <returns>The transformed JSON body data.</returns>
+    BodyData TransformBodyAsJson(
+        ITransformerContext transformerContext,
+        ReplaceNodeOptions options,
+        object model,
+        IBodyData original);
+}

src/WireMock.Net.Shared/Transformers/ITransformerContext.cs

@@ -0,0 +1,34 @@
+// Copyright © WireMock.Net
+
+using JetBrains.Annotations;
+using WireMock.Handlers;
+
+namespace WireMock.Transformers;
+
+/// <summary>
+/// Defines the transformer context used to render and evaluate templates during response transformation.
+/// </summary>
+[PublicAPI]
+public interface ITransformerContext
+{
+    /// <summary>
+    /// Gets the file system handler used by the current transformer context.
+    /// </summary>
+    IFileSystemHandler FileSystemHandler { get; }
+
+    /// <summary>
+    /// Renders the specified template text using the supplied model.
+    /// </summary>
+    /// <param name="text">The template text to render.</param>
+    /// <param name="model">The model used during rendering.</param>
+    /// <returns>The rendered text.</returns>
+    string ParseAndRender(string text, object model);
+
+    /// <summary>
+    /// Evaluates the specified template text using the supplied model.
+    /// </summary>
+    /// <param name="text">The template text to evaluate.</param>
+    /// <param name="model">The model used during evaluation.</param>
+    /// <returns>The evaluated value.</returns>
+    object? ParseAndEvaluate(string text, object model);
+}

src/WireMock.Net.Shared/Transformers/NewtonsoftJsonBodyTransformer.cs

@@ -0,0 +1,271 @@
+// Copyright © WireMock.Net
+
+using System.Collections;
+using HandlebarsDotNet.Helpers.Models;
+using JetBrains.Annotations;
+using JsonConverter.Newtonsoft.Json;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using WireMock.Settings;
+using WireMock.Types;
+using WireMock.Util;
+
+namespace WireMock.Transformers;
+
+/// <summary>
+/// Default JSON body transformer implementation based on Newtonsoft.Json.
+/// </summary>
+/// <remarks>
+/// Initializes a new instance of the <see cref="NewtonsoftJsonBodyTransformer"/> class.
+/// </remarks>
+/// <param name="settings">The server settings used to configure JSON transformation behavior.</param>
+[PublicAPI]
+public class NewtonsoftJsonBodyTransformer(WireMockServerSettings settings) : IJsonBodyTransformer
+{
+    private static readonly NewtonsoftJsonConverter _jsonConverter = new();
+
+    /// <inheritdoc />
+    public BodyData TransformBodyAsJson(
+        ITransformerContext transformerContext,
+        ReplaceNodeOptions options,
+        object model,
+        IBodyData original)
+    {
+        var jsonSerializer = new JsonSerializer
+        {
+            Culture = settings.Culture
+        };
+
+        JToken? jToken = null;
+        switch (original.BodyAsJson)
+        {
+            case JObject bodyAsJObject:
+                jToken = bodyAsJObject.DeepClone();
+                WalkNode(transformerContext, jsonSerializer, options, jToken, model);
+                break;
+
+            case JArray bodyAsJArray:
+                jToken = bodyAsJArray.DeepClone();
+                WalkNode(transformerContext, jsonSerializer, options, jToken, model);
+                break;
+
+            case var bodyAsEnumerable when bodyAsEnumerable is IEnumerable and not string:
+                jToken = JArray.FromObject(bodyAsEnumerable, jsonSerializer);
+                WalkNode(transformerContext, jsonSerializer, options, jToken, model);
+                break;
+
+            case string bodyAsString:
+                jToken = ReplaceSingleNode(transformerContext, jsonSerializer, options, bodyAsString, model);
+                break;
+
+            case not null:
+                jToken = JObject.FromObject(original.BodyAsJson, jsonSerializer);
+                WalkNode(transformerContext, jsonSerializer, options, jToken, model);
+                break;
+        }
+
+        return new BodyData
+        {
+            Encoding = original.Encoding,
+            DetectedBodyType = original.DetectedBodyType,
+            DetectedBodyTypeFromContentType = original.DetectedBodyTypeFromContentType,
+            ProtoDefinition = original.ProtoDefinition,
+            ProtoBufMessageType = original.ProtoBufMessageType,
+            BodyAsJson = jToken
+        };
+    }
+
+    private JToken ParseAsJObject(string stringValue)
+    {
+        if (_jsonConverter.IsValidJson(stringValue))
+        {
+            try
+            {
+                // Try to convert this string into a JObject
+                return JObject.Parse(stringValue!);
+            }
+            catch
+            {
+                settings.Logger.Warn("Failed to parse string ''{0}'' as JSON. Returning the original string value.", stringValue);
+            }
+        }
+
+        return stringValue;
+    }
+
+    private JToken ReplaceSingleNode(ITransformerContext transformerContext, JsonSerializer jsonSerializer, ReplaceNodeOptions options, string stringValue, object model)
+    {
+        var transformedString = transformerContext.ParseAndRender(stringValue, model);
+
+        if (!string.Equals(stringValue, transformedString))
+        {
+            const string property = "_";
+            JObject dummy = JObject.Parse($"{{ \"{property}\": null }}");
+            if (dummy[property] == null)
+            {
+                return string.Empty;
+            }
+
+            JToken node = dummy[property]!;
+
+            ReplaceNodeValue(jsonSerializer, options, node, transformedString);
+
+            return dummy[property]!;
+        }
+
+        return stringValue;
+    }
+
+    private void WalkNode(ITransformerContext transformerContext, JsonSerializer jsonSerializer, ReplaceNodeOptions options, JToken node, object model)
+    {
+        switch (node.Type)
+        {
+            case JTokenType.Object:
+                foreach (var child in node.Children<JProperty>().ToArray())
+                {
+                    WalkNode(transformerContext, jsonSerializer, options, child.Value, model);
+                }
+                break;
+
+            case JTokenType.Array:
+                foreach (var child in node.Children().ToArray())
+                {
+                    WalkNode(transformerContext, jsonSerializer, options, child, model);
+                }
+                break;
+
+            case JTokenType.String:
+                var stringValue = node.Value<string>();
+                if (string.IsNullOrEmpty(stringValue))
+                {
+                    return;
+                }
+
+                var transformed = transformerContext.ParseAndEvaluate(stringValue!, model);
+                if (!Equals(stringValue, transformed))
+                {
+                    ReplaceNodeValue(jsonSerializer, options, node, transformed);
+                }
+                break;
+        }
+    }
+
+    private void ReplaceNodeValue(JsonSerializer jsonSerializer, ReplaceNodeOptions options, JToken node, object? transformedValue)
+    {
+        switch (transformedValue)
+        {
+            case JValue jValue:
+                node.Replace(jValue);
+                return;
+
+            case string transformedString:
+                var (isConvertedFromString, convertedValueFromString) = TryConvert(options, transformedString);
+                if (isConvertedFromString)
+                {
+                    node.Replace(JToken.FromObject(convertedValueFromString, jsonSerializer));
+                }
+                else
+                {
+                    node.Replace(ParseAsJObject(transformedString));
+                }
+                break;
+
+            case WireMockList<string> strings:
+                switch (strings.Count)
+                {
+                    case 1:
+                        node.Replace(ParseAsJObject(strings[0]));
+                        return;
+
+                    case > 1:
+                        node.Replace(JToken.FromObject(strings.ToArray(), jsonSerializer));
+                        return;
+                }
+                break;
+
+            case { }:
+                var (isConverted, convertedValue) = TryConvert(options, transformedValue);
+                if (isConverted)
+                {
+                    node.Replace(JToken.FromObject(convertedValue, jsonSerializer));
+                }
+                return;
+
+            default:
+                return;
+        }
+    }
+
+    private static (bool IsConverted, object ConvertedValue) TryConvert(ReplaceNodeOptions options, object value)
+    {
+        var valueAsString = value as string;
+
+        if (options == ReplaceNodeOptions.Evaluate)
+        {
+            if (valueAsString != null && WrappedString.TryDecode(valueAsString, out var decoded))
+            {
+                return (true, decoded);
+            }
+
+            return (false, value);
+        }
+
+        if (valueAsString != null)
+        {
+            return WrappedString.TryDecode(valueAsString, out var decoded)
+                ? (true, decoded)
+                : TryConvertToKnownType(valueAsString);
+        }
+
+        return (false, value);
+    }
+
+    internal static (bool IsConverted, object ConvertedValue) TryConvertToKnownType(string value)
+    {
+        if (bool.TryParse(value, out var boolResult))
+        {
+            return (true, boolResult);
+        }
+
+        if (int.TryParse(value, out var intResult))
+        {
+            return (true, intResult);
+        }
+
+        if (long.TryParse(value, out var longResult))
+        {
+            return (true, longResult);
+        }
+
+        if (double.TryParse(value, out var doubleResult))
+        {
+            return (true, doubleResult);
+        }
+
+        if (Guid.TryParseExact(value, "D", out var guidResult))
+        {
+            return (true, guidResult);
+        }
+
+        if (TimeSpan.TryParse(value, out var timeSpanResult))
+        {
+            return (true, timeSpanResult);
+        }
+
+        if (DateTime.TryParse(value, out var dateTimeResult))
+        {
+            return (true, dateTimeResult);
+        }
+
+        if ((value.StartsWith("ftp://", StringComparison.OrdinalIgnoreCase) ||
+            value.StartsWith("ftps://", StringComparison.OrdinalIgnoreCase) ||
+            value.StartsWith("http://", StringComparison.OrdinalIgnoreCase) ||
+            value.StartsWith("https://", StringComparison.OrdinalIgnoreCase)) &&
+            Uri.TryCreate(value, UriKind.RelativeOrAbsolute, out var uriResult))
+        {
+            return (true, uriResult);
+        }
+
+        return (false, value);
+    }
+}

src/WireMock.Net.Shared/Transformers/SystemTextJsonBodyTransformer.cs

@@ -0,0 +1,208 @@
+// Copyright © WireMock.Net
+
+using System.Collections;
+using System.Text.Json;
+using System.Text.Json.Nodes;
+using HandlebarsDotNet.Helpers.Models;
+using JetBrains.Annotations;
+using JsonConverter.System.Text.Json;
+using WireMock.Settings;
+using WireMock.Types;
+using WireMock.Util;
+
+namespace WireMock.Transformers;
+
+/// <summary>
+/// JSON body transformer implementation based on System.Text.Json.
+/// </summary>
+[PublicAPI]
+public class SystemTextJsonBodyTransformer(WireMockServerSettings settings) : IJsonBodyTransformer
+{
+    private static readonly SystemTextJsonConverter _jsonConverter = new();
+
+    /// <inheritdoc />
+    public BodyData TransformBodyAsJson(
+        ITransformerContext transformerContext,
+        ReplaceNodeOptions options,
+        object model,
+        IBodyData original)
+    {
+        JsonNode? jsonNode = null;
+        switch (original.BodyAsJson)
+        {
+            case JsonObject bodyAsJsonObject:
+                jsonNode = CloneNode(bodyAsJsonObject);
+                jsonNode = WalkNode(transformerContext, options, jsonNode, model);
+                break;
+
+            case JsonArray bodyAsJsonArray:
+                jsonNode = CloneNode(bodyAsJsonArray);
+                jsonNode = WalkNode(transformerContext, options, jsonNode, model);
+                break;
+
+            case var bodyAsEnumerable when bodyAsEnumerable is IEnumerable and not string:
+                jsonNode = JsonSerializer.SerializeToNode(bodyAsEnumerable);
+                if (jsonNode != null)
+                {
+                    jsonNode = WalkNode(transformerContext, options, jsonNode, model);
+                }
+                break;
+
+            case string bodyAsString:
+                jsonNode = ReplaceSingleNode(transformerContext, options, bodyAsString, model);
+                break;
+
+            case not null:
+                jsonNode = JsonSerializer.SerializeToNode(original.BodyAsJson);
+                if (jsonNode != null)
+                {
+                    jsonNode = WalkNode(transformerContext, options, jsonNode, model);
+                }
+                break;
+        }
+
+        return new BodyData
+        {
+            Encoding = original.Encoding,
+            DetectedBodyType = original.DetectedBodyType,
+            DetectedBodyTypeFromContentType = original.DetectedBodyTypeFromContentType,
+            ProtoDefinition = original.ProtoDefinition,
+            ProtoBufMessageType = original.ProtoBufMessageType,
+            BodyAsJson = jsonNode
+        };
+    }
+
+    private JsonNode ParseAsJsonObject(string stringValue)
+    {
+        if (_jsonConverter.IsValidJson(stringValue))
+        {
+            try
+            {
+                var parsed = JsonNode.Parse(stringValue);
+                if (parsed is JsonObject)
+                {
+                    return parsed;
+                }
+            }
+            catch
+            {
+                settings.Logger.Warn("Failed to parse string ''{0}'' as JSON. Returning the original string value.", stringValue);
+            }
+        }
+
+        return JsonValue.Create(stringValue)!;
+    }
+
+    private JsonNode? ReplaceSingleNode(ITransformerContext transformerContext, ReplaceNodeOptions options, string stringValue, object model)
+    {
+        var transformedString = transformerContext.ParseAndRender(stringValue, model);
+
+        if (!string.Equals(stringValue, transformedString))
+        {
+            return ReplaceNodeValue(options, transformedString);
+        }
+
+        return JsonValue.Create(stringValue);
+    }
+
+    private JsonNode? WalkNode(ITransformerContext transformerContext, ReplaceNodeOptions options, JsonNode? node, object model)
+    {
+        switch (node)
+        {
+            case JsonObject jsonObject:
+                foreach (var property in jsonObject.ToArray())
+                {
+                    jsonObject[property.Key] = WalkNode(transformerContext, options, property.Value, model);
+                }
+                return jsonObject;
+
+            case JsonArray jsonArray:
+                for (var i = 0; i < jsonArray.Count; i++)
+                {
+                    jsonArray[i] = WalkNode(transformerContext, options, jsonArray[i], model);
+                }
+                return jsonArray;
+
+            case JsonValue jsonValue when jsonValue.TryGetValue<string>(out var stringValue):
+                if (string.IsNullOrEmpty(stringValue))
+                {
+                    return jsonValue;
+                }
+
+                var transformed = transformerContext.ParseAndEvaluate(stringValue!, model);
+                return !Equals(stringValue, transformed) ? ReplaceNodeValue(options, transformed) ?? jsonValue : jsonValue;
+
+            default:
+                return node;
+        }
+    }
+
+    private JsonNode? ReplaceNodeValue(ReplaceNodeOptions options, object? transformedValue)
+    {
+        switch (transformedValue)
+        {
+            case JsonNode jsonNode:
+                return CloneNode(jsonNode);
+
+            case string transformedString:
+                var (isConvertedFromString, convertedValueFromString) = TryConvert(options, transformedString);
+                return isConvertedFromString
+                    ? JsonSerializer.SerializeToNode(convertedValueFromString)
+                    : ParseAsJsonObject(transformedString);
+
+            case WireMockList<string> strings:
+                switch (strings.Count)
+                {
+                    case 1:
+                        return ParseAsJsonObject(strings[0]);
+
+                    case > 1:
+                        return JsonSerializer.SerializeToNode(strings.ToArray());
+                }
+                break;
+
+            case { }:
+                var (isConverted, convertedValue) = TryConvert(options, transformedValue);
+                if (isConverted)
+                {
+                    return JsonSerializer.SerializeToNode(convertedValue);
+                }
+                break;
+        }
+
+        return null;
+    }
+
+    private static JsonNode? CloneNode(JsonNode? node)
+    {
+#if NET8_0_OR_GREATER
+        return node?.DeepClone();
+#else
+        return node == null ? null : JsonNode.Parse(node.ToJsonString());
+#endif
+    }
+
+    private static (bool IsConverted, object ConvertedValue) TryConvert(ReplaceNodeOptions options, object value)
+    {
+        var valueAsString = value as string;
+
+        if (options == ReplaceNodeOptions.Evaluate)
+        {
+            if (valueAsString != null && WrappedString.TryDecode(valueAsString, out var decoded))
+            {
+                return (true, decoded);
+            }
+
+            return (false, value);
+        }
+
+        if (valueAsString != null)
+        {
+            return WrappedString.TryDecode(valueAsString, out var decoded)
+                ? (true, decoded)
+                : NewtonsoftJsonBodyTransformer.TryConvertToKnownType(valueAsString);
+        }
+
+        return (false, value);
+    }
+}

src/WireMock.Net.Shared/Util/BodyParser.cs

@@ -1,6 +1,5 @@
 // Copyright © WireMock.Net
 
-using System.Linq;
 using System.Net.Http.Headers;
 using System.Text;
 using Stef.Validation;
@@ -129,11 +128,11 @@ internal static class BodyParser
     {
         Guard.NotNull(settings);
 
-        var bodyWithContentEncoding = await ReadBytesAsync(settings.Stream, settings.ContentEncoding, settings.DecompressGZipAndDeflate).ConfigureAwait(false);
+        var (ContentType, Bytes) = await ReadBytesAsync(settings.Stream, settings.ContentEncoding, settings.DecompressGZipAndDeflate).ConfigureAwait(false);
         var data = new BodyData
         {
-            BodyAsBytes = bodyWithContentEncoding.Bytes,
+            BodyAsBytes = Bytes,
-            DetectedCompression = bodyWithContentEncoding.ContentType,
+            DetectedCompression = ContentType,
             DetectedBodyType = BodyType.Bytes,
             DetectedBodyTypeFromContentType = DetectBodyTypeFromContentType(settings.ContentType)
         };
@@ -169,17 +168,17 @@ internal static class BodyParser
                 data.DetectedBodyType = BodyType.FormUrlEncoded;
             }
 
-            // If string is not null or empty, try to deserialize the string to a JObject
+            // If string is not null or empty, try to deserialize the string
-            if (settings.DeserializeJson && JsonUtils.IsJson(data.BodyAsString))
+            if (settings.DeserializeJson && settings.DefaultJsonConverter.IsValidJson(data.BodyAsString))
             {
                 try
                 {
-                    data.BodyAsJson = JsonUtils.DeserializeObject(data.BodyAsString);
+                    data.BodyAsJson = settings.DefaultJsonConverter.Deserialize<object>(data.BodyAsString);
                     data.DetectedBodyType = BodyType.Json;
                 }
                 catch
                 {
-                    // JsonConvert failed, just ignore.
+                    // JsonConverter failed, just ignore.
                 }
             }
         }
@@ -202,7 +201,7 @@ internal static class BodyParser
         return (null, data);
     }
 
-    public static bool IsProbablyText(byte[] data)
+    private static bool IsProbablyText(byte[] data)
     {
         if (data.Length == 0)
         {