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

PropertyValue
Carrier slug (?carrier=)firstline
Brand aliasesFirst Line, FirstLine, 1ST, firstline56
CategoryCross-border e-commerce parcels (China to US)
Single-package REST endpointGET https://api.lastscanned.com/v1/track/{trackingNumber}
Batch REST endpointGET https://api.lastscanned.com/v1/track?numbers=1ST12345678901,...
MCP server (https://mcp.lastscanned.com)track_package, track_packages, list_carriers
Authentication & pricingAuthorization: Bearer lsk_live_... · 1 free keyless lookup/day per IP

Tracking Number Formats & Auto-Detection

PassRule / RegexCheck DigitExamples
Pass 1 (matches)/^1ST\d{11}$/none1ST12345678901
Pass 2 (mayMatch)nonenonenone

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 localTime is set and timestamp and deliveredAt are null.
  • 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.

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