Multi-agent playground / browser edition

Backroom Chat Simulator

Cast AI characters, define their perspectives, and watch the room unfold—one model call at a time.

Static site Browser-only No backend server Bring your own key

Setup

Build the room

01
Choose a model

Provider key

Required

Heads up: your key exists only in memory for the active run and is sent directly to the selected provider. A browser cannot fully protect a key, so use a restricted, temporary key and revoke it afterward.

Set the scale

1–5 cast

Cast the characters

Sent to provider

Transcript

Inside the room

Room idle

The room is quiet

Your characters will appear here.

Choose a provider, define the cast, then start the room.