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The 2026-07-28 MCP Specification Release Candidate | Model Context Protocol Blog

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The release candidate for the next Model Context Protocol (MCP) specification is now available: a stateless protocol core, the Extensions framework, Tasks, MCP Apps, authorization hardening, and a formal deprecation policy.

The release candidate for MCP 2026-07-28 is now available. It is the largest revision of the protocol since launch and delivers on the 2026 roadmap: a stateless core that scales on ordinary HTTP infrastructure extensions including server-rendered UIs through MCP Apps and long-running work through the Tasks extension authorization that aligns more closely with OAuth and OpenID Connect deployments a formal deprecation policy so the protocol can evolve without breaking what you’ve built, and many other changes. The practical effect on a production deployment is immediate. A remote MCP…

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