mcp-debug
★ 37
vs
fastapi_mcp
★ 12.0k
mcp-debug vs fastapi_mcp
mcp-debug: `mcp-debug` is a command-line tool designed for debugging Model Context Protocol (MCP) servers. It allows developers to inspect server capabilities, debug tool integrations, and test server notifications, offering features like OAuth 2.1 authentication and an interactive REPL.; fastapi_mcp: FastAPI-MCP allows you to expose your existing FastAPI endpoints as Model Context Protocol (MCP) tools. It offers native integration with FastAPI, including built-in authentication using existing dependencies, and preserves schemas and documentation.
01
TL;DR
mcp-debugDev Tooling · ★ 37
Debugging and inspecting the capabilities and behavior of MCP servers.
fastapi_mcpDev Tooling · ★ 12.0k
When to choose:
- You already have a FastAPI application and want to expose its endpoints as MCP tools while reusing your existing FastAPI authentication dependencies and Swagger schemas.
- You want to mount the MCP server directly onto your ASGI app or deploy it separately under an MIT license.
When to skip:
- You are building a standalone MCP server from scratch rather than wrapping a FastAPI app; use FastMCP or the official MCP Python SDK.
- You need an actively updated repository (last push was November 2025).
02
Side-by-Side Comparison
03
Features
mcp-debug01Connect to any MCP Server using `streamable-http` transport.
02Full OAuth 2.1 Authentication compliance with automatic discovery, resource indicators, and PKCE validation.
03Interactive REPL to explore available tools, resources, and prompts.
04Acts as an MCP server itself, enabling integration with AI assistants.
05Verbose logging of JSON-RPC messages for in-depth debugging and shell autocompletion.
fastapi_mcp01Authentication built in, using your existing FastAPI dependencies!
02FastAPI-native: Not just another OpenAPI -> MCP converter
03Zero/Minimal configuration required
04Preserving schemas of your request models and response models
05Flexible deployment - Mount your MCP server to the same app, or deploy separately
04
Use Cases
mcp-debug↳Debugging and inspecting the capabilities and behavior of MCP servers.
↳Testing and integrating custom tools with MCP servers.
↳Running as an MCP server to enable integration with AI assistants like Cursor.
↳Interactively exploring and understanding the available tools, resources, and prompts on an MCP server.
↳Analyzing detailed JSON-RPC message flows for troubleshooting and protocol adherence.
fastapi_mcp↳Integrating FastAPI services as tools for large language models (LLMs) that support MCP.
↳Enabling LLMs to interact with and utilize existing business logic and data exposed via FastAPI.
↳Quickly exposing authenticated FastAPI APIs as discoverable and usable tools within an MCP ecosystem.
05
Best For
mcp-debug—
fastapi_mcpMost PopularEssential
FAQ
FAQ
What is the difference between mcp-debug and fastapi_mcp?
Both mcp-debug and fastapi_mcp are in the Dev Tooling category. mcp-debug has 37 stars, while fastapi_mcp has 12.0k stars.
Which is better, mcp-debug or fastapi_mcp?
The best choice depends on your use case. Choose mcp-debug if Debugging and inspecting the capabilities and behavior of MCP servers., and fastapi_mcp if Integrating FastAPI services as tools for large language models (LLMs) that support MCP..
Is mcp-debug free or open source?
Yes, mcp-debug is open source on GitHub (Apache-2.0).
Is fastapi_mcp free or open source?
Yes, fastapi_mcp is open source on GitHub (MIT).
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