5 MCP Dev Summit Takeaways That Change How You Build Python Agents

The first MCP Dev Summit just ended. April 2-3, New York City, 95 sessions, speakers from Anthropic, AWS, Microsoft, OpenAI, Datadog, and Hugging Face. The Agentic AI Foundation now has 170 member organizations governing the protocol. Most coverage focuses on announcements. This post focuses on what you need to change in your Python code. 1. The Python SDK V2 Is Coming — Plan Your Migration Now Max Isbey from Anthropic presented "Path to V2 for MCP SDKs" at the summit. The Python SDK has moved slower than TypeScript — v1.26.0 landed in January 2026, with v1.27 following later. Meanwhile, the TypeScript SDK shipped multiple releases with conformance testing improvements. The pace difference is intentional — Anthropic is holding back major Python changes until the V2 design solidifies. What V2 likely breaks: mcp.server.auth module — The authentication surface is being redesigned. If you use the current auth middleware, document every import and configuration pattern you depend on. Transp