The MCP 2026-07-28 spec is final: your Azure migration plan
The Model Context Protocol specification version 2026-07-28 shipped on 28 July with a stateless core, Multi Round-Trip Requests, required routing headers, cacheable list results and a hardened authorization model that deprecates Dynamic Client Registration in favour of Client ID Metadata Documents. All four Tier 1 SDKs shipped support on release day, so Azure teams running MCP servers on Container Apps, AKS or behind API Management can start migrating immediately.