POST /v1/calls/calls

curl -X POST https://api.vonative.com/v1/calls/calls \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "assistant_id": "668a5015-e94c-4769-9180-72dff89ee9f4",
    "customer_phone": "+2348012345678",
    "phone_number_id": "cb977a7d-45d7-44a1-99f5-59fe19efe36e",
    "scheduled_at": "2026-05-20T19:30:00Z",
    "metadata": {
      "source": "website",
      "priority": "high"
    }
  }'

{
  "success": true,
  "data": {
    "session_id": "ses_abc123",
    "estimated_cost": "0.15",
    "message": "Call initiated successfully",
    "status": "initiated"
  }
}

{
  "success": true,
  "data": {
    "session_id": null,
    "estimated_cost": null,
    "message": "Call successfully scheduled for 2026-05-20T19:30:00+00:00",
    "status": "scheduled"
  }
}