MCP apps

MCP Apps (Model Context Protocol) delivers interactive, sandboxed user interfaces directly into AI agent conversations, standardizing complex, multi-step workflows.

MCP Apps is the Model Context Protocol Extension (SEP-1865) that enables MCP servers to render portable, secure UI elements in-conversation, moving beyond text-only interactions. This architecture uses sandboxed iframes and auditable JSON-RPC over postMessage for communication, ensuring a strong security boundary. It supports critical enterprise functions: for instance, providing an interactive audit dashboard for database access requests or a structured approval interface for infrastructure changes. Hosts like Claude, Goose, and Visual Studio Code are adopting this extension, making dynamic interfaces standard across the agent ecosystem.

https://modelcontextprotocol.io