Fastapi MCP Server

Expose FastAPI endpoints as Model Context Protocol tools for your AI assistant applications.

Data last scanned yesterday · Reviewed yesterday

47★ 11,953PythonMIT

Overview

FastAPI-MCP allows developers to transform existing FastAPI applications into Model Context Protocol servers. By mounting the server directly to your app, you can expose your endpoints as MCP tools while preserving your original request models, response schemas, and endpoint documentation.

Our verdict

With a security score of 47/100, this server is classified as high-risk. Key concerns include the lack of independent editorial review and the fact that authentication and read-only modes remain unverified. Users should exercise caution as the project is community-maintained and has not seen a commit in over 240 days, making it unsuitable for environments requiring frequent security updates or official vendor support.

Uses FastAPI-native ASGI interface for efficient communication
Preserves existing Swagger endpoint documentation and schemas
Zero direct dependencies reduces the supply-chain surface
Supports integrating existing FastAPI authentication dependencies

Community-maintained without official vendor oversight
No recent commits in the last 241 days
Authentication, read-only, and OAuth flows are unreviewed

Compatibility

Client	Local	Docker	Remote	Read-only
Claude Desktop
Cursor
VS Code
Windsurf
ChatGPT

Frequently asked questions

›What are the system requirements for running this server?

The server requires Python 3.10 or higher, with 3.12 recommended. Using uv for package management is also required.

›How does the server handle authentication?

The server uses your existing FastAPI dependencies, allowing you to secure your MCP endpoints using standard FastAPI Depends calls.

›Can I deploy the MCP server separately from my existing FastAPI application?

Yes, while the server can be mounted directly to your FastAPI app, separate deployment is also supported.

›Does this tool convert OpenAPI specifications to MCP tools?

No, it is a FastAPI-native extension that communicates directly with your application via the ASGI interface rather than acting as a standard OpenAPI converter.

›Where are the MCP endpoints hosted when mounted to a FastAPI app?

Once the MCP server is mounted, it becomes available at the /mcp endpoint of your base URL.