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MCP 2.0: What Changed and How to Migrate
Community description: MCP's biggest revision (2026-07-28) removes sessions, adds stateless requests and MCP Apps. What breaks, what is new, and a practical Python migration checklist.
Dev.to | Nov 3, 2026 | Muhammad Saud
Automated excerpt
Every request now carries its own protocol version and client capabilities, which means any server instance can answer any request — and your MCP server finally scales like an ordinary web service. MCP Apps lets a server render interactive HTML inside a sandboxed iframe. But auth must now run on every request, not once per session.
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