API Explorer MCP Server

Interactive Postman-like API request builder and response viewer for testing HTTP endpoints in chat.

Features

• Interactive Request Builder - Build HTTP requests with method, URL, headers, and body directly in the UI
• Full HTTP Support - Send GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS requests
• Response Inspection - View response status, headers, body, content-type, and execution time
• Custom Headers - Add arbitrary HTTP headers to requests for authentication and API testing
• Error Handling - Comprehensive error reporting with 30-second request timeout
• Real-time Results - Instantly see API responses and debug endpoints without leaving chat

Installation

npm install @gongrzhe/server-api-explorer

Usage

As a CLI

npx @gongrzhe/server-api-explorer

Claude Desktop Configuration

Add this to your claude_desktop_config.json:

{
  "mcpServers": {
    "api-explorer": {
      "command": "npx",
      "args": ["-y", "@gongrzhe/server-api-explorer"]
    }
  }
}

Claude Code Configuration

claude mcp add api-explorer -- npx -y @gongrzhe/server-api-explorer

Tools

send-request

Sends an HTTP request to the specified URL and returns the response including status, headers, and body.

Input Parameters:

• method (required) - HTTP method (GET, POST, PUT, PATCH, DELETE, HEAD, OPTIONS)
• url (required) - The URL to send the request to
• headers (optional) - HTTP headers as key-value pairs
• body (optional) - Request body (for POST, PUT, PATCH)

Output:

• status - HTTP status code
• statusText - Status text (e.g., "OK", "Not Found")
• headers - Response headers as key-value pairs
• body - Response body text
• contentType - Content-Type header value
• executionTimeMs - Request execution time in milliseconds
• error (optional) - Error message if request failed

Example Prompt

Send a GET request to https://jsonplaceholder.typicode.com/posts/1

License

MIT