GET /v1/call-tracking/failed

curl -X GET https://api.vonative.com/v1/call-tracking/failed \
  -H "Authorization: Bearer YOUR_API_KEY"

{
  "success": true,
  "data": [
    {
      "session_uuid": "...",
      "error": "Insufficient credits",
      "failed_at": "2025-01-15T10:30:00Z"
    }
  ]
}