MCP is the open standard Anthropic built so AI agents can talk to tools and data. The 2026-07-28 spec just went final, and it’s the biggest rewrite since launch.
What actually changed
The core went stateless. No more session affinity, which means you can park an MCP server behind a dumb round-robin load balancer and scale it sideways like any boring web app. That alone kills the ugliest part of running MCP in production.
Then the fun stuff. MCP Apps let a server return interactive HTML that renders in a sandboxed iframe — tools stop being walls of text and start being real UI. The Tasks extension handles long-running background jobs instead of forcing everything into one blocking call. Authorization now maps cleanly onto OAuth/OIDC, and Enterprise-Managed Authorization graduated to stable.
Why it matters
This is MCP crossing from “works on my laptop” to enterprise plumbing — complete with the first real deprecation policy (12 months minimum before anything gets pulled). Every language SDK ships support. If you run an MCP server, you have migrating to do.
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