The common standard 'MCP' connecting AI and external tools gets its biggest update yet: what changed with the abolition of sessions?

MCP released a major new spec, 2026-07-28, marking a shift to stateless design by removing initialize and session IDs.

The update adds MRTR for user confirmation, Tasks for long-running work, cache-related features, and stronger OAuth authentication.

A formal extensions framework was also introduced, making MCP easier to scale and deploy in serverless and large-scale environments.