What’s New in MCP 2025‑03‑26? Deep Dive into OAuth 2.1, Streamable HTTP, and JSON‑RPC Enhancements
The MCP 2025‑03‑26 release introduces mandatory OAuth 2.1 with PKCE, a single‑endpoint Streamable HTTP transport, required JSON‑RPC batch processing, richer tool metadata, structured progress notifications, audio multimodal support, and robust session management, all backed by extensive security hardening and performance gains.
