The 2026-07-28 SpecificationThe 2026-07-28 Model Context Protocol specification is out, bringing a stateless protocol core, Multi Round-Trip Requests, header-based routing, cacheable list results, authorization hardening, a formal extensions framework, and updated Tier 1 SDKs. July 28, 2026 · 12 min · David Soria Parra (Lead Maintainer), Den Delimarsky (Lead Maintainer) Since our last November release MCP continued to grow a
Announcing Mastra Factory | Mastra Blog
