# 4Sides Tracking API & MCP

URL: https://docs.lastscanned.com/carriers/4sides

Query live **4Sides** (`4sides`) package status and scan history in a single synchronous `GET` request or MCP tool call.

## Overview & Quick Facts

| Property | Value |
|---|---|
| **Carrier slug (`?carrier=`)** | `4sides` |
| **Brand aliases** | 4Sides, 4sides.ru, Четыре стороны |
| **Category** | Russian fulfilment and parcel delivery |
| **Single-package REST endpoint** | `GET https://api.lastscanned.com/v1/track/{trackingNumber}` |
| **Batch REST endpoint** | `GET https://api.lastscanned.com/v1/track?numbers=FS027259187RU,FS027259187RU` |
| **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`)** | `/^F[SE]\d{9}RU$/` | none | `FS027259187RU` |
| **Pass 2 (`mayMatch`)** | none | none | none |

`F + S or E + 9 digits + RU` numbers belong to 4Sides alone, so `?carrier=4sides` is optional.

## Synchronous `GET` Request & Normalized JSON Response

```bash
curl -s "https://api.lastscanned.com/v1/track/FS027259187RU?carrier=4sides" \
  -H "Authorization: Bearer $LASTSCANNED_API_KEY"
```

```json
{
  "carrier": "4sides",
  "trackingNumber": "FS027259187RU",
  "status": "delivered",
  "statusDescription": "Попытка доставки (Доставлено, получил: Иванов)",
  "service": null,
  "deliveredAt": null,
  "deliveredAtLocal": "2026-02-28",
  "signedBy": "Иванов",
  "destination": {
    "city": "Миасс",
    "state": "Челябинская область",
    "country": "Россия"
  },
  "events": [
    {
      "timestamp": null,
      "localTime": "2026-02-28",
      "status": "delivered",
      "description": "Попытка доставки (Доставлено, получил: Иванов)",
      "location": null,
      "code": null
    },
    {
      "timestamp": null,
      "localTime": "2026-02-17",
      "status": "in_transit",
      "description": "Приём (В СЦ, в городе: Челябинск (Челябинская область))",
      "location": "Челябинск (Челябинская область)",
      "code": null
    },
    {
      "timestamp": null,
      "localTime": "2026-02-15",
      "status": "label_created",
      "description": "Сбор (В СЦ)",
      "location": null,
      "code": null
    }
  ]
}
```

## Notes

- **Dates only**: scans have a date but no time of day, so `timestamp` is `null` and `localTime` is the date (`2026-02-28`).
- **Order**: scans on the same day keep their order from the carrier, newest first.

## Related Resources

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