MCP releases spec 2025-03-26
Spec 2025-03-26 — OAuth 2.1 authorization, Streamable HTTP, tool annotations
Why it matters
Introduced a transport that replaces HTTP+SSE and a standard authorization framework
Source — Primary sources first; secondary reports are labelled “Press”
Officialmodelcontextprotocol.iohttps://modelcontextprotocol.io/specification/2025-03-26/changelogAdded in Week 35, 2026 · See that week