# La Poste / Colissimo / Chronopost Tracking API & MCP

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

Query live **La Poste** (`laposte`, covering **Colissimo**, **Chronopost** and tracked mail such as Lettre suivie and Recommandé) package status and scan history in a single synchronous `GET` request or MCP tool call. `lastscanned` auto-detects Colissimo parcel numbers and UPU S10 numbers ending `FR`.

## Overview & Quick Facts

| Property | Value |
|---|---|
| **Carrier slug (`?carrier=`)** | `laposte` |
| **Brand & service aliases** | La Poste, Colissimo, Chronopost, Lettre suivie, Recommandé |
| **Single-package REST endpoint** | `GET https://api.lastscanned.com/v1/track/{trackingNumber}` |
| **Batch REST endpoint** | `GET https://api.lastscanned.com/v1/track?numbers=NUMBER1,NUMBER2` |
| **MCP server (`https://mcp.lastscanned.com`)** | `track_package`, `track_packages`, `list_carriers` (`claude mcp add --transport http lastscanned https://mcp.lastscanned.com`) |
| **Authentication & pricing** | `Authorization: Bearer lsk_live_...` · **1 free keyless lookup/day per IP** · **Free tier** (5 unique numbers/day, $0) · **Pro** ($4.99/mo for 1,000 unique numbers, unlimited re-polls, $0.015/extra) · **HTTP 402 Stripe MPP** ($0.50 for 25-number `lsk_pack_` key or $0.02/number in USDC on Tempo) |

## Tracking Number Formats & Auto-Detection

| Pass | Rule | Check Digit | Examples |
|---|---|---|---|
| **Pass 1 (`matches`) — Colissimo** | 1 digit, 1 letter, then 11 digits (13 characters) | GS1 mod-10 over the 11 digits | `6A12345678905` |
| **Pass 1 (`matches`) — UPU S10** | 2 letters, 9 digits, `FR` | UPU S10 mod-11 | `RR123456785FR` |
| **Pass 2 (`mayMatch`)** | *None* | — | — |

Chronopost numbers that are not S10 shaped need `?carrier=laposte`.

## Synchronous `GET` Request & Normalized JSON Response

### `curl`

```bash
curl -s "https://api.lastscanned.com/v1/track/6A12345678905" \
  -H "Authorization: Bearer $LASTSCANNED_API_KEY"
```

### JavaScript / TypeScript (`fetch`)

```ts
const res = await fetch("https://api.lastscanned.com/v1/track/6A12345678905", {
  headers: { Authorization: `Bearer ${process.env.LASTSCANNED_API_KEY}` },
});
const pkg = await res.json();
console.log(pkg.status, pkg.events[0]);
```

### MCP `track_package` tool call

```json
{
  "tool": "track_package",
  "arguments": {
    "tracking_number": "6A12345678905"
  }
}
```

### Normalized `TrackingResult` JSON response

```json
{
  "carrier": "laposte",
  "trackingNumber": "6A12345678905",
  "status": "in_transit",
  "statusDescription": "Votre Colissimo est en cours de traitement sur le site de tri local.",
  "service": "Colissimo",
  "deliveredAt": null,
  "deliveredAtLocal": null,
  "signedBy": null,
  "destination": null,
  "estimatedDelivery": null,
  "message": null,
  "events": [
    {
      "timestamp": "2026-10-08T06:59:01Z",
      "localTime": "2026-10-08T08:59:01",
      "status": "in_transit",
      "description": "Votre Colissimo est en cours de traitement sur le site de tri local.",
      "location": "FR",
      "code": "EP1"
    }
  ]
}
```

## Notes

- Scan wording is French, as La Poste prints it. Each scan carries its own UTC offset, so `timestamp` is exact.
- A number La Poste has no scans for yet, and a number with a wrong check digit, both come back as `not_found`.
- When the parcel goes on under a partner's number (international Colissimo), `message` reads `"Handed to <partner> as <number>"`.

## Related Resources

- **Carrier hub**: [All supported carriers](/carriers)
- **Regex & check digits**: [Tracking number formats & auto-detection](/formats)
- **AI support workflows**: [WISMO AI agents & synchronous tracking](/wismo)