FastMCP
MCP & connectorsThe most-used framework for building MCP servers in Python, with a fast, decorator-based API.
FastMCP is the high-level way to build MCP servers. Decorate a Python function and it becomes a tool a model can call; the framework handles the protocol, schemas, and transport.
It made writing MCP servers approachable enough that the core of it was upstreamed into the official Python SDK, and it continues to add server-building conveniences.
Where it's ideally used
The default when you are building a custom MCP server in Python and want to write tools, not protocol plumbing.
Where it doesn't fit
Not the layer you need if you only consume existing MCP servers — that calls for a client, not a server framework.