FastMCP
- Repository: PrefectHQ/fastmcp
- GitHub/Star: 26,176 (checked 2026-07-13).
- The fast, Pythonic way to build MCP servers, clients, and apps — expose Python functions as MCP-compliant tools, resources, and prompts, with schema generation, validation, transport negotiation, and protocol lifecycle handled automatically.
- Written in Python.
- Maintained by Prefect and underpins its Prefect/Horizon platform.
Versions and the MCP Python SDK
- FastMCP 1.0 was incorporated into the official MCP Python SDK in 2024.
- FastMCP 2.0 is the actively maintained standalone project, which Prefect cites as powering a large share of MCP servers across languages.