Frequently Asked Questions about FastAPI-MCP

Q: What is FastAPI-MCP?

A: FastAPI-MCP is a zero-configuration tool designed to automatically expose FastAPI endpoints as Model Context Protocol (MCP) tools. It simplifies the integration of FastAPI applications with AI Agents and Large Language Models (LLMs).

Q: What is Model Context Protocol (MCP)?

A: MCP is an open protocol that standardizes how applications provide context to LLMs, enabling AI models to access and interact with external data sources and tools.

Q: How do I install FastAPI-MCP?

A: You can install FastAPI-MCP using uv with the command uv add fastapi-mcp or using pip with the command pip install fastapi-mcp.

Q: How do I use FastAPI-MCP?

A: To use FastAPI-MCP, you import FastApiMCP, create an instance with your FastAPI app, and then mount it. Example:

python from fastapi import FastAPI from fastapi_mcp import FastApiMCP

app = FastAPI()

mcp = FastApiMCP(app) mcp.mount()

Q: Do I need to configure anything to use FastAPI-MCP?

A: No, FastAPI-MCP is designed to be zero-configuration. It automatically discovers and converts your FastAPI endpoints to MCP tools.

Q: Can I customize which endpoints are exposed as MCP tools?

A: Yes, you can control which endpoints are exposed using Open API operation IDs or tags with include_operations, exclude_operations, include_tags, and exclude_tags parameters.

Q: Can I deploy the MCP server separately from my FastAPI app?

A: Yes, you can create an MCP server from one FastAPI app and mount it to a different app for flexible deployment.

Q: What if I add new endpoints to my FastAPI app after creating the MCP server?

A: You can refresh the MCP server to include the new endpoints by calling the setup_server() method on your FastApiMCP instance.

Q: How does FastAPI-MCP handle tool naming?

A: FastAPI-MCP uses the operation_id from your FastAPI routes as the MCP tool names. It’s recommended to specify explicit operation_id values for clearer tool names.

Q: Where can I find examples of how to use FastAPI-MCP?

A: You can find complete examples in the examples directory of the FastAPI-MCP repository.

Q: How can I contribute to FastAPI-MCP?

A: You can contribute by posting Issues and Pull Requests to the FastAPI-MCP repository. Please see the Contribution Guide for more information.

Q: Where can I get support for FastAPI-MCP?

A: You can join the MCParty Slack community to connect with other MCP enthusiasts, ask questions, and share your experiences.