Yaak MCP Server Plugin

Exposes Yaak's functionality via the Model Context Protocol (MCP).

Setup

Add this to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{
  "mcpServers": {
    "yaak": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "http://127.0.0.1:64343/mcp"]
    }
  }
}

Restart Claude Desktop and make sure Yaak is running.

Available Tools

list_http_requests - List all HTTP requests in a workspace
get_http_request - Get details of a specific HTTP request
send_http_request - Send an HTTP request and get the response
create_http_request - Create a new HTTP request
update_http_request - Update an existing HTTP request
delete_http_request - Delete an HTTP request
list_folders - List all folders in a workspace
list_workspaces - List all open workspaces
get_workspace_id - Get the current workspace ID
get_environment_id - Get the current environment ID
copy_to_clipboard - Copy text to the system clipboard
show_toast - Show a toast notification in Yaak

Environment Selection

send_http_request accepts an optional environmentId for that execution. It overrides the active environment without changing the selection in Yaak. Omitting it uses the host's active environment, as before.

The ID must identify a base or sub-environment in the request's workspace. An empty, unknown, foreign-workspace, or folder environment ID returns an error before sending. Use the base environment ID to run with global variables only. Folder variables still apply according to the request's folder hierarchy.

{
  "id": "rq_example",
  "workspaceId": "wk_example",
  "environmentId": "ev_staging"
}

This requires a Yaak host with support for the environmentId plugin API field; older hosts ignore it. get_environment_id reports the active selection, not the override used by a previous send.