MCP Python SDK

Python implementation of the Model Context Protocol (MCP)

This Python SDK implements the Model Context Protocol (MCP), enabling standardized context provision for LLMs. It facilitates building MCP clients and servers, supporting standard transports like stdio and SSE, and handling MCP protocol messages.

The SDK allows exposing data via Resources (like GET endpoints), providing functionality through Tools (like POST endpoints), and defining interaction patterns using Prompts. Key components include the FastMCP server, which manages connections and message routing.

Installation is streamlined with uv add "mcp[cli]" or pip install mcp. The SDK supports development mode via mcp dev server.py and Claude Desktop integration with mcp install server.py. Advanced features include a low-level server implementation for customization and a client interface for connecting to MCP servers. The SDK defines primitives like Prompts, Resources, and Tools, and server capabilities such as prompt and resource management.