Tracking, in your application.

/api/v1/tracking/{number}

Send your API key in the Authorization header from your server. Keep it out of browser code and public repositories.

curl "https://4px.it.com/api/v1/tracking/DEMO4PX10000001" \
  -H "Authorization: Bearer YOUR_API_KEY"

During deployment, replace the domain above with your Vercel preview URL.

Example response (abbreviated)

{
  "number": "DEMO4PX10000001",
  "simulated": true,
  "notice": "Demo shipment. All events are simulated, not carrier scans.",
  "destination": "San Martin, United States",
  "carrier": "GOFO",
  "estimatedDelivery": "2025-10-07T22:17:00.000Z",
  "status": "Delivered (simulated)",
  "events": [
    {
      "at": "2025-10-07T22:17:00.000Z",
      "location": "San Martin",
      "description": "Delivered to door / yard (simulated)",
      "stage": 5,
      "simulated": true
    }
  ]
}