The viewer is your home base: browse scenarios, run them, watch each step live, and debug failures — all locally.
Launch
npx @unotest/web viewerIt starts a localhost HTTP + WebSocket server and opens your browser. Set
UNOTEST_VIEWER_NO_OPEN=1 to start without opening a tab. Your agent can also
launch it via the open_viewer MCP tool.
What it is
- Local-only. No cloud, no account. It reads run artifacts from
unotest/.runs/and your scenarios/helpers/collections from disk. - Read + run. Browse and run; results stream live over WebSocket.
- Single source of truth. Breakpoints and variables are files on disk, so the CLI, the agent and the viewer all agree.
Next
- Tour — the activity bar and panels
- Running tests
- Step debugger