Modern requests remove the protocol-level session and initialization handshake.
MMCP Readiness
2026-07-28 Release CandidateMCP specification update
Is your MCP setup ready for July 28?
Check how the upcoming MCP specification may affect your client, server, SDK, authorization, and deployment setup.
Final specification release · Global timeRelease candidate available
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What changes
The largest MCP revision since launch
The release changes transport state, extensions, long-running work, authorization, and future protocol evolution.
Long-running work moves into an official extension instead of the protocol core.
New capabilities can ship as opt-in extensions, including server-rendered interfaces.
Authorization aligns more closely with OAuth and OpenID Connect deployment patterns.
30-second check
Check your setup
This is a practical risk estimate, not a formal certification. Existing MCP implementations do not suddenly stop working on July 28.
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Official sources
Read the release material
Release candidate announcementStateless core, extensions, Tasks, MCP Apps, authorization, and deprecation policy.Beta SDK announcementTesting guidance for Python, TypeScript, Go, and C#.Python SDK changesv2 beta and 2026-07-28 protocol differences.TypeScript migration guideDetailed support and migration notes for the new revision.