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MCP’s 2026-07-28 protocol era moves towards stateless, extensible agent infrastructure

2026-07-28

MCP’s 2026-07-28 protocol era moves towards stateless, extensible agent infrastructure
Jawad.N.N (CC BY-SA 4.0)

Publication/version date: 28 July 2026 · Status: Official SDK implementation confirmed; GA announcement incomplete at cut-off

The Model Context Protocol’s new wire design removes protocol-level sessions and the previous initialisation handshake, carries client and protocol metadata per request, and introduces a discovery RPC. Tasks and MCP Apps become extensions, while authorisation is aligned more closely with OAuth/OpenID Connect deployments. Official Go SDK v1.7.0 declares support for the 2026-07-28 protocol.

Why it matters: Stateless requests can run behind ordinary load balancers without sticky sessions, but the change is breaking for software that assumes session-bound state or old error codes.

Impact: Platform teams need dual-era negotiation, explicit state handles, auth issuer/scope validation, conformance tests and rollback plans. Official MCP release-candidate overview · Official Go SDK releases

Regulation · European Union

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