How to track JCEX (`JC...` / `92...`) US parcels handed off to USPS Ground Advantage, UniUni & GOFO

# 1. Query JCEX (JiaCheng International) origin waybill (extracts final-mile barcode in .message):
curl "https://api.lastscanned.com/v1/track/JC8492019482US" \
  -H "Authorization: Bearer lsk_live_YOUR_API_KEY"

# 2. Query the extracted USPS barcode:
curl "https://api.lastscanned.com/v1/track/9200190348291049281972" \
  -H "Authorization: Bearer lsk_live_YOUR_API_KEY"

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 carrier: USPS (9200190348291049281972)")
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();
}

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