Model Context Protocol Releases July 28, 2026 Update: Remove Session, Move Towards Stateless HTTP Deployment
On July 28, 2026, MCP officially released the 2026-07-28 edition specification. The core of the protocol has been changed from a stateless bidirectional model to a stateless request/response model: the initialize handshake and Mcp-Session-Id have been removed, server/discover and Mcp-Method header routing have been added, and list responses support ttlMs caching. SEP-2567 replaces the Session scope with an explicit state handle, and MRTR retains the mid-interaction capability of tools. Extensions such as MCP Apps and Tasks have been formalized, and AWS Bedrock AgentCore, Netlify and others have expressed their support. This article sorts out the key points of the changes and production migration recommendations.
Read MoreMCP's Largest Version Update: How Stateless Core Enables AI Agents to Truly Enter Production
On July 28, 2026, the Model Context Protocol released its 2026-07-28 specification, marking the largest revision since the protocol launched: the initialize handshake and Mcp-Session-Id have been removed, and the protocol has shifted to a stateless HTTP request/response model, enabling servers to be deployed on Serverless platforms and behind standard load balancers. MCP Apps and Tasks have graduated to official extensions, OAuth 2.0 authorization synchronization has been strengthened, and full support for Claude will be rolled out gradually. This article sorts out six key points including SEP stateless transformation, extension framework, enterprise authorization essentials, and breaking change migration suggestions for production environment evaluation and reference.
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