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MCP Protocol Goes Stateless: What Scaling Now Demands
On 2026-07-28, the Model Context Protocol specification release candidate shipped under the MCP Transports Working Group, removing transport-level session management entirely. The legacy 2025-11-25 model pinned clients to a single pod via an Mcp-Session-Id header, breaking horizontal scaling. The new stateless core lets any pod serve any request on ordinary HTTP infrastructure. This desk frames it as a release candidate rather than a ratified standard, and argues protocol standardization is the real competitive moat in agentic AI.
The skinny
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