The MCP Python SDK 2.0 broke the wrapper libraries. Here's how to spot it and pin back
This story is from 2026-09-13. It is preserved in the archive; the latest stories are on the live feed.
If your MCP tools started failing a few weeks ago and nothing in your own code changed, you're not imagining it. The official Python mcp package shipped 2.0.0 on 2026-07-28. It's a real major version, with public APIs removed and renamed. Latest on PyPI right now is 2.2.0, and a plain pip install m…
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- 2026-09-13 17:22 · DEV Community — AI
The MCP Python SDK 2.0 broke the wrapper libraries. Here's how to spot it and pin back