A live Claude agent composing A2UI surfaces at runtime, rendered to a screen and to speech at the same time. It needs your Anthropic API key.
The key is stored in this browser's localStorage and sent directly to
api.anthropic.com. There is no backend here — it goes nowhere else.
That also means anyone with access to this browser can read it, so use a key you
can rotate, and never ship this pattern to production: there, the call belongs
behind your own server.
Without a Deepgram key it falls back to the browser's own speech, which has no voices on some machines and no recognition at all in Firefox.
Get one at console.anthropic.com. Or try the scripted charging demo — no key needed.
Screen unavailable
The turn has to complete by voice alone.
Ask for something. Every hop shows up here with real values and where it ran.
action fires that "the second one" would have sent.SeatMap, which carries
requiresVisual. Switch off Screen available first and the renderer
declines to describe it rather than inventing a cabin layout.PaymentConfirm carries
stakes: readback, so the amount is read back and an explicit yes is
required — whether you tapped or spoke.spokenSensitive.