MCP spec with stateless core
The 2026-07-28 MCP spec moves to a stateless core with standard extensions and hardened auth.
The MCP 2026-07-28 spec is live, moving the Model Context Protocol to a stateless core with standardized extensions and hardened auth. Support is rolling out across Claude products soon. See what's new and how MCP is advancing in Claude.
Official source
MCP 2026-07-28 spec: stateless core, coming to Claudeclaude.com · published