// event · protocol
Model Context Protocol spec revision 2026-07-28 released
protocolvendor: modelcontextprotocolpublished: 1mo agoconfidence: 0.90id: 3f605cc2-9218-4cd9-9751-74e94a0839c8
The Model Context Protocol has published the stable 2026-07-28 revision of its specification. This is the versioned protocol contract that MCP clients (agents/hosts) and MCP servers implement to exchange tools, resources, prompts, and sampling requests. Full details are on modelcontextprotocol.io along with a changelog covering deltas from the prior revision.
capability delta
An agent can now negotiate the 2026-07-28 MCP protocol revision with servers, gaining access to any new tool/resource/sampling semantics introduced in this stable release.
curator note
Protocol revision bump — implementers should review the changelog to determine breaking changes vs. the previous stable revision.
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