Major Revision to MCP Specification: Protocol Layer Fully Switches to Stateless HTTP
On July 28, 2026, the official MCP team released the largest revision since the protocol was launched: the `initialize` handshake and `Mcp-Session-Id` have been removed, and the core of the protocol has been changed to a stateless request/response model. Remote MCP Servers can be deployed behind load balancers like ordinary HTTP services for horizontal scaling; MRTR now supports elicitation interactions in stateless scenarios; gateway-level routing is implemented via the `Mcp-Method`/`Mcp-Name` headers. This article sorts out the changed mechanism, request comparisons, and key points for developer migration.
Read MoreMajor Version Update of MCP: Stateless Core, Official Extensions and Enterprise-level Certification
On July 28, 2026, the Model Context Protocol released its 2026-07-28 specification, marking the largest revision since the protocol's launch. The core changes include: shifting from a bidirectional stateful protocol to a request/response stateless model, removing the initialize handshake and Mcp-Session-Id; upgrading MCP Apps and Tasks to official extensions; and strengthening OAuth 2.0/OIDC authentication to integrate with enterprise IdPs. With monthly SDK downloads exceeding 400 million and over 950 Claude connectors, MCP is becoming the de facto standard for Agent interconnection.
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