PrefectHQ/fastmcp

Project overview

FastMCP is a Pythonic framework that simplifies building Model Context Protocol (MCP) servers and clients by handling boilerplate, transport negotiation, and protocol lifecycle management. It enables developers to wrap Python functions into MCP-compliant tools with automatic schema generation.

Project type

MCP

Use cases

Automation

Deployment

Refer to project documentation

License

Apache-2.0

Best for

• Python developers building MCP-compliant servers and clients who require automatic schema generation.

Key capabilities

• Wraps standard Python functions into MCP-compliant tools, resources, and prompts to expose to large language models.
• Generates schema, validation, and documentation automatically based on Python function definitions.

Limitations and risks

• Writing Python code is required to use the framework.
• Telemetry, data boundaries, cost dependencies, minimum hardware, model requirements, external services, and GPU needs are currently not documented.

Getting started

• Install the framework easily using pip or uv, then import the library and define an MCP tool using standard Python code.

Evidence and sources

• GitHub project description: 🚀 The fast, Pythonic way to build MCP servers and clients.
• README: Building an effective MCP application is harder than it looks. FastMCP handles all of it. Declare a tool with a Python function, and the schema, validation, and documentation are…
• README: FastMCP 1.0 was incorporated into the official MCP Python SDK in 2024. Today, the actively maintained standalone project is downloaded a million times a day, and some version of F…
• README: We recommend installing FastMCP with [uv](https://docs.astral.sh/uv/): ```bash uv pip install fastmcp ```
• README: from fastmcp import FastMCP mcp = FastMCP("Demo 🚀") @mcp.tool def add(a: int, b: int) -> int: """Add two numbers""" return a + b

Reviewed at: 2026-07-17T10:52:10Z