
MCP Inspector
Official visual testing tool for Model Context Protocol servers
Visit modelcontextprotocol.io FreeOpen source
MCP Inspector is the official developer tool for testing and debugging MCP servers. It connects over stdio or HTTP and lets you browse and invoke tools, resources, and prompts while inspecting protocol messages.
Key features
- Connects over stdio and HTTP transports
- Browse and call tools, resources, and prompts
- Inspect raw protocol messages
- Run with a single npx command
Try it on DevTools Daily
Similar tools

Claude Agent SDK
Build custom agents on the same agent loop and tools as Claude Code

FastMCP
Fast, Pythonic framework for building MCP servers and clients

MCP Python SDK
Official Python SDK for Model Context Protocol servers and clients

MCP TypeScript SDK
Official TypeScript SDK for building MCP servers and clients
OpenAI Agents SDK
Lightweight framework for multi-agent workflows with handoffs and tracing
Vercel AI SDK
Provider-agnostic TypeScript toolkit for AI apps and agents