Track Winit (WO… / ID… / UT…) cross-border and overseas warehouse shipments into USPS.

Winit operates cross-border linehaul and overseas fulfillment warehouses for eBay and global marketplace sellers, handing parcels off to USPS, DHL, Royal Mail, and Australia Post.

Barcode transition: Winit to USPS

When Winit clears customs and hands off to USPS, lastscanned surfaces the secondary tracking number in the top-level message field.

Origin / middle-mile carrier
Winit (winit)
Winit barcode (WO / ID / UT / SS + digits)
^(WO|ID|UT|SS)\d{10,16}$
Origin example
WO260123456789
Final-mile carrier
USPS (usps)
USPS 92… / 94… IMpb
^9[234]\d{18,24}$
Final-mile example
9400111899223456789012
Extracted in .message
Final-mile carrier: USPS

How the Winit → USPS handoff works

Follow the parcel across both networks without waiting on asynchronous webhooks or losing visibility at the handoff boundary.

1. Winit outbound processing
Winit picks and packs the item at its overseas warehouse or China consolidation hub.
2. Linehaul & regional hub arrival
Cross-border parcels fly into destination port hubs while domestic warehouse orders dispatch same-day.
3. Postal / courier induction
USPS (or Royal Mail / DHL in Europe) scans the parcel for final delivery.
Auto-detection
WO/ID/UT/SS prefixes auto-detect as winit in Pass 2
Explicit override
GET /v1/track/{number}?carrier=winit
Primary marketplaces
eBay International Shipping, cross-border DTC brands

Chain Winit → USPS in code or MCP

Resolve both legs synchronously in TypeScript, curl, or your AI support agent via Streamable HTTP MCP.

REST (Synchronous GET)

# 1. Query Winit origin waybill (extracts final-mile barcode in .message):
curl "https://api.lastscanned.com/v1/track/WO260123456789" \
  -H "Authorization: Bearer lsk_live_YOUR_API_KEY"

# 2. Query the extracted USPS barcode:
curl "https://api.lastscanned.com/v1/track/9400111899223456789012" \
  -H "Authorization: Bearer lsk_live_YOUR_API_KEY"

TypeScript (Automatic Handoff Chaining)

const headers = { Authorization: `Bearer ${process.env.LASTSCANNED_API_KEY}` };
const originRes = await fetch(`https://api.lastscanned.com/v1/track/${encodeURIComponent(number)}`, { headers });
const originPkg = await originRes.json();

// Extract secondary barcode from top-level message ("Final-mile carrier: USPS")
const handoff = originPkg.message?.match(/^Handed to (.+?) as ([A-Z0-9-]+)$/i);
if (handoff) {
  const [, , lastMileNumber] = handoff;
  const destRes = await fetch(`https://api.lastscanned.com/v1/track/${encodeURIComponent(lastMileNumber)}`, { headers });
  const destPkg = await destRes.json();
}

Remote MCP (Claude Code / Cursor / ChatGPT)

claude mcp add --transport http lastscanned https://mcp.lastscanned.com \
  --header "Authorization: Bearer lsk_live_YOUR_API_KEY"

Winit Global Warehouse & Linehaul to USPS Handoff Tracking FAQ

What is Winit on my eBay tracking page?
Winit is a global cross-border supply-chain and overseas warehouse provider partnered with eBay for Greater China and international sellers.
How do I track a Winit WO… or ID… tracking number?
Call GET /v1/track/{number}?carrier=winit on lastscanned to retrieve all warehouse, export, and final-mile events.

Other carrier handoff guides

Explore cross-border last-mile barcode extraction and domestic USPS consolidator overrides across all 125 carriers.

All 125 supported carriers