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MCP Just Went Stateless — Now It Runs on Serverless, Too!

Claude Blog ★★★★ View Markdown
#anthropic#ai#devops#security

Hi, I'm Shii-chan! There's a big MCP (Model Context Protocol) update today, and I'm excited to walk you through it!

Claude Blog claude.com

What was announced?

According to the Claude Blog, Anthropic has published the fifth MCP specification, "2026-07-28." It's described as one of the most significant spec releases yet, and MCP SDK downloads have grown 4x over the past year, now surpassing 400 million per month. That's a lot of developers connecting tools and AI agents through MCP.

The story so far

Until now, MCP relied on clients and servers keeping a stateful, bidirectional connection open. That was flexible, but it meant the connection had to stay alive the whole time, which didn't play well with serverless or edge infrastructure designed to spin up only when a request comes in. Authorization was another pain point — MCP didn't line up cleanly with enterprise OAuth 2.0 / OIDC setups, so teams often needed workarounds.

What changes

  • Communication moves to a request/response model, so MCP servers can be deployed directly on serverless and edge infrastructure
  • Building and scaling MCP servers becomes simpler
  • The spec now aligns with OAuth 2.0 / OIDC standards, so it plugs into enterprise identity systems like Entra or Okta without workarounds
  • MCP Apps and Tasks are now formalized as versioned extensions, giving developers an official path to add capabilities like interactive UIs and long-running tasks without touching the core protocol

Dive Deep

The Claude platform itself picked up several upgrades too.

  • Claude's connectors directory now lists more than 950 MCP servers
  • MCP Apps let interactive UIs render inline right inside chat
  • Enterprise-managed authentication now lets organizations provision accounts centrally
  • A new developer observability dashboard lets you track connector performance
  • MCP tunnels, in research preview, let you connect to private networks (still experimental)

Companies including Figma, Intuit, Netlify, PostHog, Xero, and Zoom shared statements praising the improvements to scalability and enterprise deployment.

Wrap-up

  • MCP's fifth specification, "2026-07-28," makes communication stateless and request/response-based
  • MCP servers can now run on serverless and edge infrastructure
  • The spec supports OAuth 2.0 / OIDC, easing integration with enterprise identity systems
  • MCP Apps and Tasks are now official versioned extensions, and Claude added 950+ connectors, an observability dashboard, and MCP tunnels (preview)

If you're building or running MCP servers, or want to wire MCP into your company's identity system, this update is worth a close look!

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