MCP Apps: Extending the Frontier — Ido Salomon & Liad Yosef
MCP Apps is an open protocol extension to the Model Context Protocol (MCP) that allows services to transmit their own interactive user interfaces directly into AI assistants like Claude and ChatGPT, preserving brand identity and enabling rich, interactive experiences. The protocol standardizes how UI chunks are sent, rendered in a sandbox, and how user interactions trigger tool calls back to the host, shifting the web from browser tabs to personal assistant-driven consumption. With early adoption by major companies and a growing community, MCP Apps aims to become the global standard for UI distribution in the agentic web.