What are the prerequisites to run the server?

Install the UV Package Manager (a Python package installer in Rust). Python and the dependencies listed in `pyproject.toml` are also required.

How can I test the MCP functionality?

Use the MCP Inspector: run `mcp dev ./src/weather.py`, open the inspector at `http://localhost:5173`, set the Transport Type to `SSE` and URL to `http://localhost:8000/sse`, then connect to list and run tools like `get_alerts` or `get_forcast`.

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FastAPI MCP SSE MCP Server

A working example to create a FastAPI server with SSE-based MCP support

Local serverstdioPython

What is the FastAPI MCP SSE MCP Server?

A working example to create a FastAPI server with SSE-based MCP support

What you get

A Server-Sent Events (SSE) implementation using FastAPI framework with Model Context Protocol (MCP) integration.

The Model Context Protocol (MCP) is an open standard that enables AI models to interact with external tools and data sources. MCP solves several key challenges in AI development:

Server-Sent Events (SSE) implementation with MCP
FastAPI framework integration with custom routes
Unified web application with both MCP and standard web endpoints
Customizable route structure
Clean separation of concerns between MCP and web functionality

Configuration and credentials

Install UV Package Manager - A fast Python package installer written in Rust:

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

Recorded tools

Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.

Tool	What it does
get_alerts	Get weather alerts
get_forcast	Get weather forecast

Configuration

Install UV Package Manager - A fast Python package installer written in Rust:

Example prompts to try

“Use FastAPI MCP SSE to get alerts.”
“Use FastAPI MCP SSE to get forcast.”
“Use FastAPI MCP SSE to Prerequisites.”

Frequently asked questions

It provides a reference implementation for combining FastAPI web routing with MCP’s SSE transport, allowing developers to create FastAPI apps that expose both regular web endpoints and MCP tool capabilities.

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