modelcontextprotocol/python-sdk

MCP Python SDK

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<strong>Python implementation of the Model Context Protocol (MCP)</strong>

[![PyPI][pypi-badge]][pypi-url] [![MIT licensed][mit-badge]][mit-url] [![Python Version][python-badge]][python-url] [![Documentation][docs-badge]][docs-url] [![Protocol][protocol-badge]][protocol-url] [![Specification][spec-badge]][spec-url]

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[!NOTE] This is v2 of the MCP Python SDK, the current stable release line. It is a major rework of the SDK, both to support the 2026-07-28 MCP specification (and every earlier revision) and to fix long-standing architectural issues. Coming from v1? See What's new in v2 for the tour of what changed and the migration guide for every breaking change.

Not ready to migrate? v1.x lives on the v1.x branch, continues to receive critical bug fixes and security patches, and is documented at https://py.sdk.modelcontextprotocol.io/v1/. Since pip install mcp now installs 2.x, keep a <2 upper bound on your requirement (for example mcp>=1.28,<2) until you've migrated.

Something rough, confusing, or broken? Open an issue or find us in #python-sdk-dev on the MCP Contributors Discord.

Documentation

The documentation lives at https://py.sdk.modelcontextprotocol.io/.

It has a Get started guide, What's new in v2, the API reference, and the migration guide.

What is MCP?

The [Model Context Protocol](https://modelcontextprotocol