Carriers
First Line Tracking API & MCP
Query live First Line (firstline) package status and scan history in a single synchronous GET request or MCP tool call. lastscanned auto-detects these numbers.
Overview & Quick Facts
| Property | Value |
|---|---|
Carrier slug (?carrier=) | firstline |
| Brand aliases | First Line, FirstLine, 1ST, firstline56 |
| Category | Cross-border e-commerce parcels (China to US) |
| Single-package REST endpoint | GET https://api.lastscanned.com/v1/track/{trackingNumber} |
| Batch REST endpoint | GET https://api.lastscanned.com/v1/track?numbers=1ST12345678901,... |
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) | /^1ST\d{11}$/ | none | 1ST12345678901 |
Pass 2 (mayMatch) | none | none | none |
firstline numbers are claimed by this carrier alone, so ?carrier=firstline is optional.
Synchronous GET Request & Normalized JSON Response
curl -s "https://api.lastscanned.com/v1/track/1ST06005039050?carrier=firstline" \
-H "Authorization: Bearer $LASTSCANNED_API_KEY"{
"carrier": "firstline",
"trackingNumber": "1ST06005039050",
"status": "delivered",
"statusDescription": "Delivered, Parcel Locker",
"service": null,
"deliveredAt": null,
"deliveredAtLocal": "2026-03-17T15:30:00",
"signedBy": null,
"destination": null,
"message": null,
"events": [
{
"timestamp": null,
"localTime": "2026-03-17T15:30:00",
"status": "delivered",
"description": "Delivered, Parcel Locker",
"location": "WINTER GARDEN FL 34787",
"code": null
},
{
"timestamp": null,
"localTime": "2026-03-15T21:04:00",
"status": "in_transit",
"description": "Arrived at USPS Regional Facility",
"location": "ORLANDO FL DISTRIBUTION CENTER",
"code": null
},
{
"timestamp": null,
"localTime": "2026-03-10T08:16:37",
"status": "in_transit",
"description": "Depart from facility to service provider",
"location": "SHENZHEN",
"code": null
}
]
}Notes
- Time zone: the scans mix China and US local times with no zone, so only
localTimeis set andtimestampanddeliveredAtarenull. - The tracking page signs each query, so a lookup loads the page, then posts to the signed URL it finds. The backend sometimes answers "not found" for a real number; a miss is asked again up to three times before it is reported as
not_found.
Related Resources
- Regex & check digits: Tracking number formats & auto-detection
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Track Fermopoint shipments via synchronous REST GET or MCP. Normalized JSON status and scan history, no carrier credentials required.
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Track Flash Express Philippines shipments via synchronous REST GET or MCP. Normalized JSON status and scan history, no carrier credentials required.