{
  "success": false,
  "error": "الرقم المرجعي مطلوب",
  "usage": {
    "GET": "?ref=17874536945293",
    "example": "https://your-worker.workers.dev/?ref=17874536945293"
  },
  "fixed_data": {
    "mobile": "770802939",
    "service_code": "1"
  }
}