modelcontextprotocol/python-sdk v2.0.0a1
This is the first alpha of v2 of the MCP Python SDK.
Key points
- A new Dispatcher pipeline replaces ServerSession on the server side (ServerSession remains as a thin proxy).
- Support for 2026-07-28 feature will be added over time through each alpha release with full 2026-07-28 support targeted for beta release on 2026-06-30.
- Right now v2 is very breaking, and each alpha will likely contain breaking changes from the previous one, so pin exact versions if you try it.
- Today -> 2026-06-30 - New MCP 2026-07-28 spec functionality will be added to v2 alpha versions and released regularly during this time
Sources (1)
- [1]modelcontextprotocol/python-sdk v2.0.0a1GitHub: modelcontextprotocol/python-sdk · Jun 11, 09:35 AM
This is the first alpha of v2 of the MCP Python SDK.
- A new Dispatcher pipeline replaces ServerSession on the server side (ServerSession remains as a thin proxy).
Extractive summary: sentences quoted from the sources.