FastAPI Tool Demo
byjeffrade
0Demonstrates integrating FastAPI and FastMCP to serve LLM-callable tools via the MCP protocol.
About
This project provides a practical reference implementation for creating an MCP server using Python's FastAPI framework and the FastMCP library. It specifically illustrates how to define and expose a simple 'add numbers' function, making it accessible to Large Language Models (LLMs) like Claude Code. The repository covers the entire setup process, from installation and server execution to integrating the tool with an LLM and verifying its functionality, serving as a comprehensive guide for developers looking to build custom LLM-friendly APIs.
Key Features
- FastAPI integration for building MCP servers
- Utilizes FastMCP for LLM-friendly API capabilities
- 0 GitHub stars
- Includes setup and testing instructions for Claude Code CLI
- Exposes custom functions as LLM-callable tools
- Provides a working example for an 'add_nums' tool
Use Cases
- Setting up a local MCP server for development and testing
- Integrating custom Python business logic into AI agent workflows
- Learning how to build custom LLM tools with FastAPI
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