Teams can now build and deploy MCP Apps on Vercel with full support for Next.js. MCP Apps are similar to , but are a provider-agnostic open standard for embedded UIs. They run inside iframes and communicate with any compatible host, such as Cursor, Claude.ai, and ChatGPT, using a shared bridge.ChatGPT apps This architecture uses JSON-RPC over , enabling a single UI to function across any compatible host without platform-specific integrations.ui/*postMessage By combining this standard with Next.js on Vercel, developers can leverage Server-Side Rendering (SSR) and React Server Components to build portable, high-performance agent interfaces.

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