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MCP Inspector

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GitHub TypeScript No License

Description

MCP Inspector is a debugging and inspection tool for the Model Context Protocol ecosystem, useful for validating MCP server behavior and troubleshooting integrations.

Key Features

  • React-based web UI for interactively testing and debugging MCP servers
  • MCP Proxy bridges browser to servers via stdio, SSE, and streamable HTTP transports
  • Supports bearer token authentication for secure SSE connections
  • Export server configurations to mcp.json for Cursor, Claude Code, and other clients
  • Run via npx, Docker, or directly against an MCP server repository
  • Random session token auth by default with auto browser opening

Use Cases

💡 Test and validate MCP server implementations during development
💡 Debug tool invocations and protocol interactions in a visual interface
💡 Export tested configurations directly into Cursor or Claude Code
💡 Verify SSE and streamable HTTP transport connections work correctly
💡 Debug MCP servers in Docker containers with isolated networking

Strengths & Limitations

✅ Strengths

  • • Actively maintained, recent updates
  • • High community interest (10.7k stars)
  • • Responsive to issues, low backlog

⚠️ Limitations

  • • No clear open-source license

Tags

mcp debugging protocol typescript

Categories

🔌 MCP Tools

Quick Start

npx @modelcontextprotocol/inspector → open http://localhost:6274 → configure server settings in sidebar → test tools interactively
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