The Model Context Protocol (MCP) has been updated to a stateless, sessionless core, simplifying its integration with standard HTTP infrastructure. This revision, MCP 2026-07-28, aims to streamline development for protocol implementers by removing the need for session affinity or shared session infrastructure. Key changes include making server-to-client interactions explicit round trips and introducing a first-class extension model for optional capabilities like interactive interfaces (MCP Apps) and asynchronous operations (MCP Tasks). While authorization has been improved, the protocol emphasizes that host applications remain responsible for consent interfaces and safe execution behavior. AI
IMPACT Simplifies AI agent development by standardizing tool and resource interaction, potentially accelerating adoption.
RANK_REASON Protocol specification update detailing architectural changes and new features. [lever_c_demoted from research: ic=1 ai=1.0]
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