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What Changed in the MCP Spec

This story is from 2026-10-20. It is preserved in the archive; the latest stories are on the live feed.

The MCP specification revision dated 2026-07-28 makes the Model Context Protocol stateless: the initialize handshake and the Mcp-Session-Id session header are gone, and every request now carries the context the server needs. If you run an MCP server or client in a data pipeline, the practical quest…

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  1. 2026-10-20 02:11 · DEV Community — AI
    What Changed in the MCP Spec

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