MCP Goes Stateless, and Developers Ask Whether That Just Makes It an API Again
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Deep technical analysis of MCP spec changes affecting agent architecture; highly relevant to AI agent orchestration.
The MCP 2026-07-28 specification removes protocol sessions, replacing them with stateless requests that carry version, client identity, and capabilities per call. Two new required HTTP headers—Mcp-Method and Mcp-Name—expose tool-level metadata to gateways, rate limiters, and WAFs without parsing the JSON-RPC body, enabling per-method or per-tool routing and throttling. Server-initiated requests shift to Multi Round-Trip Requests, and authorization tightens with RFC 9207 issuer identification and canonical server URIs, while Dynamic Client Registration is deprecated.