# A1 POST Tracking API & MCP

URL: https://docs.lastscanned.com/carriers/a1post

Query live **A1 POST** (`a1post`) package status and scan history in a single synchronous `GET` request or MCP tool call.

## Overview & Quick Facts

| Property | Value |
|---|---|
| **Carrier slug (`?carrier=`)** | `a1post` |
| **Brand aliases** | A1 POST, A1Post, a1post.bg |
| **Category** | Bulgarian cross-border parcels (A1 Trade) |
| **Single-package REST endpoint** | `GET https://api.lastscanned.com/v1/track/{trackingNumber}` |
| **Batch REST endpoint** | `GET https://api.lastscanned.com/v1/track?numbers=9214490221582714146891,9214490221582714146891` |
| **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 |

A1 POST is not auto-detected from the number alone: pass `?carrier=a1post`.

## Synchronous `GET` Request & Normalized JSON Response

```bash
curl -s "https://api.lastscanned.com/v1/track/9214490221582714146891?carrier=a1post" \
  -H "Authorization: Bearer $LASTSCANNED_API_KEY"
```

```json
{
  "carrier": "a1post",
  "trackingNumber": "9214490221582714146891",
  "status": "in_transit",
  "statusDescription": "The shipment has been processed, A1 POST",
  "service": null,
  "deliveredAt": null,
  "deliveredAtLocal": null,
  "signedBy": null,
  "destination": null,
  "events": [
    {
      "timestamp": "2026-07-06T07:41:00Z",
      "localTime": "2026-07-06T10:41:00",
      "status": "in_transit",
      "description": "The shipment has been processed, A1 POST",
      "location": null,
      "code": null
    },
    {
      "timestamp": "2026-07-04T17:40:00Z",
      "localTime": "2026-07-04T20:40:00",
      "status": "in_transit",
      "description": "Shipment information uploaded to A1 POST",
      "location": null,
      "code": null
    }
  ]
}
```

## Notes

- **Not auto-detected**: A1 POST numbers are often the partner carrier's own (for example a USPS number), so pass `?carrier=a1post`.
- **Handoff**: when the partner's tracking link carries a different number, `message` names the partner and that number.
- **Time zone**: Bulgarian time (`Europe/Sofia`).

## Related Resources

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