MCP 2026-07-28 Specification Released with Stateless Architecture and Extensions Framework
The Model Context Protocol reached its 2026-07-28 final specification with a stateless core architecture, an extensions framework, and OAuth/OIDC-aligned authorization. Beta SDKs are live for Python, TypeScript, Go, and C#.
Why it matters
Removes the sticky-session requirement for MCP servers, enabling horizontal scaling; the extensions framework formalizes server-rendered UIs and long-running tasks, expanding what IDE agents and coding tools can build on MCP.
Importance: 3/5
Major protocol version affecting the whole MCP ecosystem.