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The 2026-07-28 release of the Model Context Protocol has become stateless, enabling MCP servers to run on Cloudflare Workers without dedicated infrastructure for session management. The release includes changes to multi-round interactions, authorization, and the feature lifecycle, along with updated SDK packages and a migration path for existing applications.
The new release is compatible with the MCP specification dated 2026-07-28, adopts a stateless mode by default, standardizes HTTP headers, and supports multi-round-trip requests for handling interactive tools. The release maintains broad compatibility with previous code, clients, and servers, with the exception of the experimental Tasks extension.