AI Voices for Enterprise IVR

1. Write the prompt in VoisLabs, pick language + voice
2. Generate, then download as WAV or MP3
3. Convert to 8 kHz mono if your provider requires it:
     ffmpeg -i prompt.wav -ar 8000 -ac 1 prompt-8k.wav
4. Upload to your Exotel Greeting Applet

No integration, no API key, no engineering ticket.

// Planned — api.agents.voislabs.com/v1
const call = await fetch('https://api.agents.voislabs.com/v1/calls', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer vla_live_...',
    'Idempotency-Key': orderId,
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    agent_id: 'agt_order_confirmation',
    to: '+9198XXXXXXXX',
    language: 'hi-IN',
    variables: { order_id: '4521', amount: '1249' },
  }),
});

// Planned — signed event envelope, HMAC over the raw body
app.post('/hooks/voislabs', (req, res) => {
  if (!verifySignature(req.rawBody, req.headers['x-voislabs-signature'])) {
    return res.sendStatus(401);
  }
  const { type, data } = req.body;
  if (type === 'call.completed') {
    crm.update(data.variables.order_id, {
      outcome: data.outcome,        // e.g. 'confirmed'
      transcript: data.transcript_url,
    });
  }
  res.sendStatus(200); // retries + de-duplication handled for you
});