"A2UI (Agent to UI) is a UI protocol from Google that lets AI agents generate user interfaces on demand. It introduces declarative mini-apps where UI components and actions are defined in a schema, and the agent can operate them automatically. Think Telegram-style mini-apps: small, self-contained interfaces that work without custom integration code. Instead of a long question-and-answer loop, agents can now send interactive, native interfaces directly to the client."
"A2UI treats UI as structured data, not executable code. The AI doesn't send HTML, CSS, or JavaScript. It sends JSON describing what it needs. The AI decides it needs a form with a date picker and a submit button. It builds a JSON object defining those components. Your app receives that JSON and renders it using your own trusted, native components."
A2UI enables AI agents to generate interactive user interfaces by sending JSON that describes UI components and actions. The protocol uses declarative mini-apps defined in a schema so agents can both specify and operate components automatically. Clients render the JSON using trusted native components rather than executing transmitted HTML, CSS, or JavaScript. Typical workflow elements include action definitions, an A2UI Bridge for communication, and agent integration. A2UI is in public preview and an end-to-end mini-app demonstrates the schema, actions, bridge, and a community React renderer. Required tools include Node.js, Python 3.9+, and UV, with Git optional.
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