Anthropic Begins Rolling MCP 2026-07-28 Across Claude Products, Citing 400M Monthly SDK Downloads
Anthropic confirmed on 2026-07-28 that the new spec is "live today" with support rolling out across Claude products, framing three wins: stateless request/response makes remote MCP servers deployable on serverless and edge infrastructure, MCP Apps and Tasks now ship under a versioned extensions framework so interactive UIs and long-running work no longer require core protocol changes, and authorization aligns with production OAuth 2.0 and OIDC for enterprise identity systems. The company put MCP at over 400M monthly SDK downloads, a 4x increase this year. The post does not commit to per-product dates for Claude Code, Claude Desktop, or the API, and gives no backward-compatibility or mandatory-migration detail — so existing server operators should not treat this as a deadline yet.
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