diff --git a/internal/idlewatcher/debug.go b/internal/idlewatcher/debug.go
index a8aa7d3f..527d3fcd 100644
--- a/internal/idlewatcher/debug.go
+++ b/internal/idlewatcher/debug.go
@@ -1,6 +1,7 @@
 package idlewatcher
 
 import (
+	"encoding/json"
 	"iter"
 	"strconv"
 
@@ -11,9 +12,9 @@ type watcherDebug struct {
 	*Watcher
 }
 
-func (w watcherDebug) MarshalMap() map[string]any {
+func (w watcherDebug) MarshalJSON() ([]byte, error) {
 	state := w.state.Load()
-	return map[string]any{
+	return json.Marshal(map[string]any{
 		"name": w.Name(),
 		"state": map[string]string{
 			"status": string(state.status),
@@ -23,7 +24,7 @@ func (w watcherDebug) MarshalMap() map[string]any {
 		"expires":    strutils.FormatTime(w.expires()),
 		"last_reset": strutils.FormatTime(w.lastReset.Load()),
 		"config":     w.cfg,
-	}
+	})
 }
 
 func Watchers() iter.Seq2[string, watcherDebug] {
diff --git a/internal/idlewatcher/health.go b/internal/idlewatcher/health.go
index ec305f71..5a256a49 100644
--- a/internal/idlewatcher/health.go
+++ b/internal/idlewatcher/health.go
@@ -102,8 +102,8 @@ func checkUpdateState(key string) (w *Watcher, ready bool, err error) {
 	return w, false, nil
 }
 
-// MarshalMap implements health.HealthMonitor.
-func (w *Watcher) MarshalMap() map[string]any {
+// MarshalJSON implements health.HealthMonitor.
+func (w *Watcher) MarshalJSON() ([]byte, error) {
 	url := w.hc.URL()
 	if url.Port() == "0" {
 		url = nil
@@ -118,5 +118,5 @@ func (w *Watcher) MarshalMap() map[string]any {
 		Config: dummyHealthCheckConfig,
 		URL:    url,
 		Detail: detail,
-	}).MarshalMap()
+	}).MarshalJSON()
 }
diff --git a/internal/net/gphttp/loadbalancer/loadbalancer.go b/internal/net/gphttp/loadbalancer/loadbalancer.go
index 7487b89c..ce718dd1 100644
--- a/internal/net/gphttp/loadbalancer/loadbalancer.go
+++ b/internal/net/gphttp/loadbalancer/loadbalancer.go
@@ -237,8 +237,8 @@ func (lb *LoadBalancer) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
 	lb.impl.ServeHTTP(srvs, rw, r)
 }
 
-// MarshalMap implements health.HealthMonitor.
-func (lb *LoadBalancer) MarshalMap() map[string]any {
+// MarshalJSON implements health.HealthMonitor.
+func (lb *LoadBalancer) MarshalJSON() ([]byte, error) {
 	extra := make(map[string]any)
 	for _, srv := range lb.pool.Iter {
 		extra[srv.Key()] = srv
@@ -252,11 +252,12 @@ func (lb *LoadBalancer) MarshalMap() map[string]any {
 		Detail:  fmt.Sprintf("%d/%d servers are healthy", numHealthy, lb.pool.Size()),
 		Started: lb.startTime,
 		Uptime:  lb.Uptime(),
+		Latency: lb.Latency(),
 		Extra: map[string]any{
 			"config": lb.Config,
 			"pool":   extra,
 		},
-	}).MarshalMap()
+	}).MarshalJSON()
 }
 
 // Name implements health.HealthMonitor.
diff --git a/internal/proxmox/client.go b/internal/proxmox/client.go
index d218e011..bccaafd2 100644
--- a/internal/proxmox/client.go
+++ b/internal/proxmox/client.go
@@ -2,6 +2,7 @@ package proxmox
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 
 	"github.com/luthermonson/go-proxmox"
@@ -45,9 +46,8 @@ func (c *Client) Name() string {
 	return c.Cluster.Name
 }
 
-// MarshalMap implements pool.Object
-func (c *Client) MarshalMap() map[string]any {
-	return map[string]any{
+func (c *Client) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]any{
 		"version": c.Version,
 		"cluster": map[string]any{
 			"name":    c.Cluster.Name,
@@ -56,7 +56,7 @@ func (c *Client) MarshalMap() map[string]any {
 			"nodes":   c.Cluster.Nodes,
 			"quorate": c.Cluster.Quorate,
 		},
-	}
+	})
 }
 
 func (c *Client) NumNodes() int {
diff --git a/internal/proxmox/node.go b/internal/proxmox/node.go
index 5ecd9068..6fc45ba2 100644
--- a/internal/proxmox/node.go
+++ b/internal/proxmox/node.go
@@ -2,6 +2,7 @@ package proxmox
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 	"strings"
 
@@ -38,11 +39,11 @@ func (n *Node) String() string {
 	return fmt.Sprintf("%s (%s)", n.name, n.id)
 }
 
-func (n *Node) MarshalMap() map[string]any {
-	return map[string]any{
+func (n *Node) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]any{
 		"name": n.name,
 		"id":   n.id,
-	}
+	})
 }
 
 func (n *Node) Get(ctx context.Context, path string, v any) error {
diff --git a/internal/watcher/health/json.go b/internal/watcher/health/json.go
index 9059f5c4..b8b10dea 100644
--- a/internal/watcher/health/json.go
+++ b/internal/watcher/health/json.go
@@ -1,6 +1,7 @@
 package health
 
 import (
+	"encoding/json"
 	"net/url"
 	"strconv"
 	"time"
@@ -21,7 +22,7 @@ type JSONRepresentation struct {
 	Extra    map[string]any
 }
 
-func (jsonRepr *JSONRepresentation) MarshalMap() map[string]any {
+func (jsonRepr *JSONRepresentation) MarshalJSON() ([]byte, error) {
 	var url string
 	if jsonRepr.URL != nil {
 		url = jsonRepr.URL.String()
@@ -29,7 +30,7 @@ func (jsonRepr *JSONRepresentation) MarshalMap() map[string]any {
 	if url == "http://:0" {
 		url = ""
 	}
-	return map[string]any{
+	return json.Marshal(map[string]any{
 		"name":        jsonRepr.Name,
 		"config":      jsonRepr.Config,
 		"started":     jsonRepr.Started.Unix(),
@@ -44,5 +45,5 @@ func (jsonRepr *JSONRepresentation) MarshalMap() map[string]any {
 		"detail":      jsonRepr.Detail,
 		"url":         url,
 		"extra":       jsonRepr.Extra,
-	}
+	})
 }
diff --git a/internal/watcher/health/monitor/monitor.go b/internal/watcher/health/monitor/monitor.go
index 1aa2b9d5..2eded602 100644
--- a/internal/watcher/health/monitor/monitor.go
+++ b/internal/watcher/health/monitor/monitor.go
@@ -179,8 +179,8 @@ func (mon *monitor) String() string {
 	return mon.Name()
 }
 
-// MarshalMap implements health.HealthMonitor.
-func (mon *monitor) MarshalMap() map[string]any {
+// MarshalJSON implements health.HealthMonitor.
+func (mon *monitor) MarshalJSON() ([]byte, error) {
 	res := mon.lastResult.Load()
 	if res == nil {
 		res = &health.HealthCheckResult{
@@ -198,7 +198,7 @@ func (mon *monitor) MarshalMap() map[string]any {
 		LastSeen: GetLastSeen(mon.service),
 		Detail:   res.Detail,
 		URL:      mon.url.Load(),
-	}).MarshalMap()
+	}).MarshalJSON()
 }
 
 func (mon *monitor) checkUpdateHealth() error {
diff --git a/internal/watcher/health/types.go b/internal/watcher/health/types.go
index fe89533f..0f6610e7 100644
--- a/internal/watcher/health/types.go
+++ b/internal/watcher/health/types.go
@@ -1,6 +1,7 @@
 package health
 
 import (
+	"encoding/json"
 	"fmt"
 	"net/url"
 	"time"
@@ -25,6 +26,7 @@ type (
 		fmt.Stringer
 		WithHealthInfo
 		Name() string
+		json.Marshaler
 	}
 	HealthChecker interface {
 		CheckHealth() (result *HealthCheckResult, err error)