{
  "summary": "Webhook push notification payload",
  "description": "Example payload delivered by 17TRACK to a registered webhook endpoint when a tracking status changes.",
  "event": "tracking_update",
  "payload": {
    "event": "TRACKING_UPDATED",
    "data": [
      {
        "number": "1Z999AA10123456784",
        "carrier": 100003,
        "param": "ORDER-12345",
        "track": {
          "z0": {
            "z": 5,
            "s": 50,
            "a": "Austin, TX, US",
            "c": "Delivered",
            "d": "2026-06-13T14:22:00"
          },
          "z1": [
            {
              "z": 4,
              "s": 41,
              "a": "Louisville, KY, US",
              "c": "Out for Delivery",
              "d": "2026-06-13T09:30:00"
            },
            {
              "z": 5,
              "s": 50,
              "a": "Austin, TX, US",
              "c": "Delivered",
              "d": "2026-06-13T14:22:00"
            }
          ]
        }
      }
    ]
  }
}