3PL parcel SLA auditor & Valid Tracking Rate (VTR) checker.

Audit physical induction scans for TikTok Shop, Amazon, and Walmart VTR compliance, measure first-scan to delivery SLA windows, and model batch tracking volume across 542 carriers.

Verify first physical carrier scan (TikTok Shop / Amazon / Walmart 95%+ Valid Tracking Rate compliance) and exact transit duration across 542 carriers.

CarrierTracking NumberVTR InductionFirst Physical ScanDelivered TimestampTransit DaysSLA Audit
GOFO ExpressGFUS01074503026309VTR Passed2026-10-16 11:05 (Newark, NJ)2026-10-18 14:22 (Brooklyn, NY)2.1dOn-Time SLA
UniUniUUS5BM1269395824723VTR Passed2026-10-17 13:20 (LAX Gateway, CA)2026-10-19 16:08 (Los Angeles, CA)2.1dOn-Time SLA
OnTrac1LS729108273411VTR Passed2026-10-18 16:40 (Charlotte, NC)2026-10-20 15:19 (Atlanta, GA)1.9dOn-Time SLA
4PX Worldwide Express4PX3002491827361CNVTR Passed2026-10-09 20:04 (Shenzhen, CN)2026-10-15 13:45 (Chicago, IL)5.7d>5d Breach
OSM Worldwide9261290318412001879814VTR Passed2026-10-14 09:12 (Glendale Heights, IL)2026-10-17 13:40 (bend, OR)3.2dOn-Time SLA

Stop paying $0.08/shipment + re-poll surcharges.

lastscanned Pro ($0 re-polls)
$364.99/mo
Legacy Enterprise Aggregator (~$0.08/parcel)
$2000.00/mo
Quota-Multiplier API (with re-poll tax)
$1500.00/mo
Estimated Monthly Savings
$1635.01/mo saved
# Batch query up to 100 tracking numbers in a single request ($0 unlimited re-polls on Pro)
curl "https://api.lastscanned.com/v1/track?numbers=GFUS01074503026309,UUS5BM1269395824723,1LS729108273411,4PX3002491827361CN,9261290318412001879814" \
  -H "Authorization: Bearer ls_live_YOUR_API_KEY"

3PL SLA & Valid Tracking Rate (VTR) FAQ

What counts as a Valid Tracking Rate (VTR) scan on TikTok Shop, Amazon, and Walmart?
Marketplaces require at least one physical carrier possession scan (not just label_created / pre-shipment manifest) within the handling SLA window. Querying GET /v1/track?numbers=... lets you verify events.some(e => e.status !== 'label_created') across up to 100 parcels per request.
How much does high-volume SLA auditing cost on lastscanned?
The Pro plan is $4.99/month for 1,000 unique tracking numbers plus $0.015 per additional unique tracking number, with $0 unlimited re-polls for the entire billing month.
Can I audit regional last-mile couriers and cross-border consolidators in the same batch?
Yes. You can pass up to 100 mixed tracking numbers across all 542 supported carriers in a single GET /v1/track?numbers=... call.

All 542 supported carriers

Major carriers (8)

Regional and last mile (241)

+231 more regional and last mile

International posts and couriers (176)

+166 more international posts and couriers

Cross-border (117)

+107 more cross-border