The MCP server
testing platform
Open source platform for testing and debugging MCP servers. Optimize your server for LLMs.
Start up MCPJam inspector:
$ npx @mcpjam/inspector@latest
Used by developers at
Test every part of your MCP server
Fully compliant with the MCP specification. Test tool calls, auth, sampling, elicitation, and more.
All protocols supported
Connect via STDIO, SSE, or Streamable HTTP.
LLM Playground
Test your MCP server against real LLM interactions with our playground.
Enhanced Debugging
Advanced logging, error tracking, and tool execution monitoring to identify and fix issues quickly.
Test against LLMs
Use our LLM playground to test your server against Claude, GPT, and Ollama models.
Stay in touch
Open source project. We're always looking for contributors.
