MCP Dev Summit 2026: What Actually Changed for Python Developers

MCP Dev Summit NYC ran April 2–3.

Python SDK v1.27.0 shipped on April 2.

v1.27.0 adds RFC 8707 resource validation, affecting the OAuth client side.

Existing mcp.server.auth code is stable; updating to v1.27.0 requires no rework.

OAuth 2.1 emerged as the ecosystem consensus after six auth sessions; MCP SDK v2 is in active development; TypeScript v2 alphas shipped April 1; Python V2 remains pre‑alpha and not expected before Q3.