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MCP Python SDK

Official Python SDK for building MCP servers

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The official Python SDK for the Model Context Protocol, enabling developers to build MCP servers and clients with asyncio support. Provides type-safe tool definitions, resource management, and all standard MCP transports. The most popular Python package for MCP development with comprehensive documentation.

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MCP Python SDK is the official Python toolkit for building Model Context Protocol servers and clients. Current public sources show an MIT-licensed repository with 23K+ GitHub stars, PyPI package mcp at version 1.28.1, stable v1.x README and official docs coverage for FastMCP-style server ergonomics, tools, resources, prompts, stdio, SSE, and Streamable HTTP transports, while the default main README now carries v2 pre-release and migration guidance. For Python teams, it is the maintained starting point for exposing internal services, data workflows, and automation as MCP-compatible capabilities.

The SDK is strongest when the team already owns Python code and wants protocol-compliant servers or clients without inventing the MCP plumbing from scratch. It uses Python async patterns and typed APIs around server/client behavior, so developers can wrap databases, APIs, notebooks, backend jobs, or internal utilities while keeping normal Python deployment and review practices. It targets MCP-compatible clients rather than guaranteeing every host integration behaves identically, so client setup should still be checked against the current host documentation.

The main operational caveat is version motion. The default main README now foregrounds v2 pre-release and migration notes, while stable v1.x docs remain the better source for production FastMCP examples and transport setup. Treat the SDK as the official Python implementation with active releases, MIT licensing, and strong ecosystem traction, while planning to pin package versions, review migration guidance, and test the specific transports and clients your agent workflow depends on.

Pricing

Free and open-source (MIT)

Platforms

Python 3.10+, pip/uv install, asyncio

Categories

MCP ServersAgent Skills & Prompts

Tags

Open SourceFree TierPython

Use Cases

Agentic DevelopmentFull-Stack Development

Alternatives

MCP TypeScript SDK

Official TypeScript SDK for building MCP servers

The official TypeScript SDK for the Model Context Protocol, providing everything needed to build MCP servers and clients. Supports stdio, SSE, and Streamable HTTP transports with built-in auth helpers. Works across Node.js, Bun, and Deno runtimes for maximum deployment flexibility.

open-sourceOpen Source

FastMCP

Apache-2.0 Python framework for building MCP servers, clients, apps, and deployable agent tool surfaces.

FastMCP is an Apache-2.0 Python framework for building MCP servers, clients, and apps with decorators, type hints, transports, auth patterns, deployment docs, and telemetry hooks. The project now resolves to PrefectHQ/fastmcp, with Prefect Horizon available as a separate enterprise MCP gateway for identity, RBAC, audit, monitoring, and server governance.

open-sourceOpen Source

MCP Inspector

Official debugger for MCP server development

MCP Inspector is the official interactive developer tool from the Model Context Protocol team for testing, debugging, and validating MCP servers. It provides a visual interface to inspect available tools, test transport configurations, export configs for different clients, and verify protocol compliance during MCP server development.

open-sourceOpen Source

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Comparisons

MCP Python SDK vs MCP TypeScript SDK — Fast Prototyping vs Native Web Stack

MCP Python SDK and MCP TypeScript SDK are both official routes for building Model Context Protocol servers, but they serve different engineering teams. Python is the shortest path for data, ML, and scripting-heavy tools. TypeScript fits web-native teams, shared schemas, and Node deployment patterns. This comparison explains the language choice in terms of developer speed, production auth, deployment footprint, and ecosystem fit.

MCP Python SDKMCP TypeScript SDK

FastMCP vs MCP Python SDK — Framework Convenience vs Protocol Primitives

Both FastMCP and the official MCP Python SDK let you build MCP servers in Python — but they make very different bets on what developers actually need. FastMCP trades protocol fidelity for speed: decorators, sensible defaults, and a minimal surface area that gets a server running in minutes. The MCP Python SDK trades convenience for control: direct access to protocol primitives, transport internals, and the full specification. The right choice depends less on the project than on the team — and how much they want to think about the protocol underneath.

FastMCPMCP Python SDK