Put any voice agent through a live call.

1 · Agent under test

System prompt Agent voice

2 · Synthetic caller

✦ Auto-generate tests from the agent prompt Caller voice Turns

Voice runs synthesize every line with hosted TTS and play it in your browser. A/B runs the scenario twice — coached and not — and shows the lift.

📞 Call a deployed agent

Dials a real number with your saved Twilio credentials (set them in the builder). The synthetic caller runs the scenario live over the PSTN, then grades it. Pick the scenario in the Second Mind coach tab first.

Target phone number I'm authorized to test this number Place the call & run the test