# GO4 Tracking API & MCP

URL: https://docs.lastscanned.com/carriers/go4

Query live **GO4** (`go4`) parcel status in a single synchronous `GET` request or MCP tool call. Numbers are 11 digits, a shape other carriers use, so pass `?carrier=go4`.

## Overview & Quick Facts

| Property | Value |
|---|---|
| **Carrier slug (`?carrier=`)** | `go4` |
| **Brand aliases** | GO4, GO4 Slovakia, zona.go4.eu |
| **Category** | Domestic parcel courier (Slovakia) |
| **Single-package REST endpoint** | `GET https://api.lastscanned.com/v1/track/{trackingNumber}` |
| **Batch REST endpoint** | `GET https://api.lastscanned.com/v1/track?numbers=26100100123,...` |
| **MCP server (`https://mcp.lastscanned.com`)** | `track_package`, `track_packages`, `list_carriers` |
| **Authentication & pricing** | `Authorization: Bearer lsk_live_...` · 1 free keyless lookup/day per IP |

## Tracking Number Formats & Auto-Detection

| Pass | Rule / Regex | Check Digit | Examples |
|---|---|---|---|
| **Pass 1 (`matches`)** | none | none | none |
| **Pass 2 (`mayMatch`)** | none | none | none |

This carrier is not auto-detected. Parcel numbers are 11 digits (date prefix plus a serial), shared with other carriers, so `?carrier=go4` is required.

## Synchronous `GET` Request & Normalized JSON Response

```bash
curl -s "https://api.lastscanned.com/v1/track/26100100123?carrier=go4" \
  -H "Authorization: Bearer $LASTSCANNED_API_KEY"
```

```json
{
  "carrier": "go4",
  "trackingNumber": "26100100123",
  "status": "delivered",
  "statusDescription": "Delivered: in good condition",
  "service": null,
  "deliveredAt": "2026-10-01T08:15:30Z",
  "deliveredAtLocal": "2026-10-01T10:15:30",
  "signedBy": null,
  "destination": null,
  "events": [
    {
      "timestamp": "2026-10-01T08:15:30Z",
      "localTime": "2026-10-01T10:15:30",
      "status": "delivered",
      "description": "Delivered: in good condition",
      "location": null,
      "code": null
    },
    {
      "timestamp": "2026-10-01T06:00:00Z",
      "localTime": "2026-10-01T08:00:00",
      "status": "label_created",
      "description": "Ordered",
      "location": null,
      "code": null
    }
  ]
}
```

## Notes

- **Source**: GO4's status endpoint returns the order time, the main status and a detail line, and the delivery time. It has no scan list, so the result holds the order and, once delivered, the delivery.
- **Time zone**: read as `Europe/Bratislava`. When the order time is later than the delivery time, the "Ordered" event is left out so events stay newest first.

## Related Resources

- **Regex & check digits**: [Tracking number formats & auto-detection](/formats)