Google A2UI
Google's open-source Agent-to-User Interface — AI-generated declarative JSON UIs
Google's open-source Agent-to-User Interface: AI generates declarative JSON interfaces — the "frontend protocol" for agents.
AI agents that code, operate computers, and get work done.
Key features
- Open standard and libraries for agents to generate rich UIs as declarative JSON (A2UI
- Security-first: agents only reference pre-approved component catalog, no arbitrary code
- LLM-friendly flat component list with ID references, incrementally updatable for
- Framework-agnostic: same JSON renders in web components, Flutter, React, SwiftUI via
- Works over A2A Protocol and AG-UI transports; supports Web and Flutter hosts
Good for
- Agents generating dynamic forms, approval dashboards, or data
- Remote sub-agents returning UI payloads rendered inside the main
Stack & tags
DartTypeScriptagent-uiprotocola2agenerative-uiflutteropen-standardchatbot
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