Question 1

What is FastAPI-MCP?

Accepted Answer

FastAPI-MCP is a zero-configuration tool for automatically exposing FastAPI endpoints as Model Context Protocol (MCP) tools. MCP is an open protocol that standardizes how applications provide context to LLMs.

Question 2

What are the key features of FastAPI-MCP?

Accepted Answer

Key features include direct integration with FastAPI, zero configuration, automatic discovery of endpoints, preservation of schemas and documentation, and flexible deployment options.

Question 3

How do I install FastAPI-MCP?

Accepted Answer

We recommend using `uv add fastapi-mcp` or alternatively, you can install with pip: `pip install fastapi-mcp`.

Question 4

How do I use FastAPI-MCP with my FastAPI application?

Accepted Answer

Simply import `FastApiMCP` from the `fastapi_mcp` package, initialize it with your FastAPI app instance, and then mount it. See the Basic Usage example in the documentation.

Question 5

What is the purpose of the `base_url` parameter?

Accepted Answer

The `base_url` tells the MCP server where to send API requests when tools are called. It is highly recommended to provide it explicitly, especially in deployed environments.

Question 6

How does FastAPI-MCP name the MCP tools?

Accepted Answer

FastAPI-MCP uses the `operation_id` from your FastAPI routes as the MCP tool names. If you don't specify an `operation_id`, FastAPI auto-generates one, which can be cryptic.

Question 7

Can I customize which endpoints are exposed as MCP tools?

Accepted Answer

Yes, you can control which FastAPI endpoints are exposed using Open API operation IDs or tags. You can include or exclude specific operations or tags.

Question 8

Can I deploy the MCP server separately from the original FastAPI app?

Accepted Answer

Yes, you can create an MCP server from one FastAPI app and mount it to a different app. This allows for greater flexibility and scalability.

Question 9

What do I do if I add endpoints to my FastAPI app after creating the MCP server?

Accepted Answer

You need to refresh the MCP server to include the new endpoints by calling the `setup_server()` method on the `FastApiMCP` instance.

Question 10

How do I connect to the MCP Server using SSE?

Accepted Answer

In applications like Cursor, navigate to Settings -> MCP and use the URL of your MCP server endpoint (e.g., `http://localhost:8000/mcp`) as the sse URL.

Question 11

My MCP client does not support SSE, what can I do?

Accepted Answer

You can use [mcp-proxy stdio](https://github.com/sparfenyuk/mcp-proxy) to expose MCP server to client which does not support SSE. Instructions are in the documentation.

Question 12

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

Accepted Answer

See the [examples](examples) directory in the FastAPI-MCP repository for complete examples.

Question 13

Where can I get help and connect with other FastAPI-MCP users?

Accepted Answer

Join the [MCParty Slack community](https://join.slack.com/t/themcparty/shared_invite/zt-30yxr1zdi-2FG~XjBA0xIgYSYuKe7~Xg) to connect with other MCP enthusiasts, ask questions, and share your experiences with FastAPI-MCP.

Question 14

What are the requirements for using FastAPI-MCP?

Accepted Answer

FastAPI-MCP requires Python 3.10+ (Recommended 3.12) and uv.

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