PrefectHQ/fastmcp

🚀 The fast, Pythonic way to build MCP servers and clients.

What it solves

FastMCP 简化了使用 Model Context Protocol (MCP) 构建应用的过程，该协议将大型语言模型 (LLM) 与外部工具与数据连接起来。它消除了手动处理协议生命周期、传输协商、身份验证与架构生成之复杂性，让开发者能够专注于核心逻辑。

How it works

FastMCP 提供了一个框架，可以将 Python 函数封装成符合 MCP 规范的工具、资源与提示词。它会自动生成这些工具所需的架构、验证与文档。该框架由三个主要组件组成：

  • Servers: Expose tools and data to LLMs.
  • Clients: Connect to local or remote MCP servers.
  • Apps: Provide interactive UIs that render directly within the conversation.

Who it’s for

想要快速构建与部署 MCP 服务器与客户端，并希望在无需实现 Model Context Protocol 底层细节的情况下，从原型开发转向生产环境的开发者。

Highlights

  • Automatic Schema Generation: Automatically creates schemas for Python functions declared as tools.
  • Full Protocol Support: Manages transport negotiation and authentication for both clients and servers.
  • Integrated UI: Ability to create interactive UIs for tools via the Apps component.
  • Broad Adoption: Incorporated into the official MCP Python SDK and powers a larger portion of MCP servers.