CK1 / Chukou1 Tracking API & MCP
Query live CK1 / Chukou1 (chukou1) package status, scan history, and the last-mile carrier's tracking number in a single synchronous GET request or MCP tool call. Chukou1 order numbers are not exclusive to it, so pass ?carrier=chukou1 (a loose shape check is only a last-resort guess).
Overview & Quick Facts
| Property | Value |
|---|---|
Carrier slug (?carrier=) | chukou1 |
| Brand aliases | CK1, Chukou1, 出口易, EC-FirstClass |
| Category | Cross-border e-commerce parcels |
| Single-package REST endpoint | GET https://api.lastscanned.com/v1/track/{trackingNumber}?carrier=chukou1 |
| Batch REST endpoint | GET https://api.lastscanned.com/v1/track?numbers=...&carrier=chukou1 |
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) | /^[A-Z]{3}\d{6,7}LW\d{6,8}$/ | none | ABC2501011LW1000001 |
Pass ?carrier=chukou1 for any other order-number shape.
Synchronous GET Request & Normalized JSON Response
curl -s "https://api.lastscanned.com/v1/track/ABC2501011LW1000001?carrier=chukou1" \
-H "Authorization: Bearer $LASTSCANNED_API_KEY"{
"carrier": "chukou1",
"trackingNumber": "ABC2501011LW1000001",
"status": "delivered",
"statusDescription": "SPRINGFIELD, IL, 62701, Delivered, In/At Mailbox",
"service": "USPS",
"deliveredAt": null,
"deliveredAtLocal": "2025-01-14T13:31:00",
"signedBy": null,
"destination": { "city": null, "state": null, "country": "United States" },
"message": "Handed to USPS as 9400111899223344556677",
"events": [
{
"timestamp": null,
"localTime": "2025-01-14T13:31:00",
"status": "delivered",
"description": "SPRINGFIELD, IL, 62701, Delivered, In/At Mailbox",
"location": null,
"code": null
},
{
"timestamp": null,
"localTime": "2025-01-08T14:00:00",
"status": "in_transit",
"description": "United States, Turned over to last mile facility",
"location": null,
"code": null
},
{
"timestamp": null,
"localTime": "2025-01-02T15:16:00",
"status": "label_created",
"description": "Shipment information received",
"location": null,
"code": null
}
]
}Notes
- Handoff:
messagenames the last-mile carrier and its number (for example"Handed to USPS as 9400111899223344556677"). Pass that number toGET /v1/track/{number}for the carrier's own scans. - Two legs, one list: Chukou1's own first-leg scans and the last-mile carrier's scans are merged into one list, newest first.
- Time zone: the page prints times with no zone (and the two legs are in different countries), so only
localTimeis set andtimestampisnull. A made-up number returnsnot_found. - How it is queried: the same signed request the Chukou1 tracking page sends, using the signing secret in that page's own script; no captcha is involved.
Related Resources
- Regex & check digits: Tracking number formats & auto-detection
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