MCP Server Tester

Example Use Cases

• 1

  Validate MCP server configuration JSON and ensure the provided command/arguments launch correctly before deployment.

• 2

  Verify connectivity and discover available tools exposed by an MCP server via WebSocket interactions.

• 3

  A quick local test harness to debug MCP server startup issues and inspect runtime status from a browser UI.

Description

This project provides a frontend (React) and backend (Node.js/Express) for submitting MCP server configuration JSON, launching the specified MCP server process on the backend, and verifying connectivity and available tools via WebSockets. It runs the MCP server using spawn and returns status/results to the frontend so users can quickly validate and debug configurations. Useful for developers who want to confirm an MCP server works locally before deployment; the app is deployed-friendly (Vercel) and intended as a development/testing utility.