Who delivers STO Express (Shentong) parcels in the UK?

Once cleared at Heathrow, STO Express parcels are delivered in the UK by Royal Mail, Evri, or Yodel.

How long does STO Express take from China to the UK?

Most STO Express e-commerce air parcels reach the UK and complete Royal Mail delivery in 6 to 11 calendar days.

STO Express (sto)→Royal Mail (royalmail)

STO Express International to Royal Mail & Yodel UK Handoff

How STO Express (Shentong) cross-border shipments from China transition to Royal Mail, Evri, or Yodel after UK customs clearance.

Try a live tracking number:

Barcode transition: STO Express to Royal Mail

When STO Express clears customs and hands off to Royal Mail, lastscanned surfaces the secondary tracking number in the top-level message field.

STO Express lookup →Royal Mail lookup →Format & check-digit detector →

Origin / middle-mile carrier: STO Express (sto)
STO Express Waybill (77… / 13–15 digits): 77… (15 digits)
Origin example: 773192837461528
Final-mile carrier: Royal Mail (royalmail)
Royal Mail Tracked (AA999999999GB): AA999999999GB
Final-mile example: OJ192837465GB
Extracted in .message: Cleared UK customs - Handed over to Royal Mail / Yodel

How the STO Express → Royal Mail handoff works

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

1. STO Express Chinese origin sorting: STO Express (Shentong) sorts parcels through its Shanghai, Hangzhou, or Shenzhen hubs and prepares UK export manifests.
2. UK air arrival & HMRC clearance: The air-freight container lands at London Heathrow or East Midlands Airport and clears UK customs.
3. Royal Mail, Evri, or Yodel delivery: The UK final-mile carrier scans the pre-applied domestic label and delivers within 1 to 3 working days.
STO Express query: GET /v1/track/773192837461528?carrier=sto
Royal Mail query: GET /v1/track/OJ192837465GB?carrier=royalmail

Chain STO Express → Royal Mail in code or MCP

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

Get an API key WISMO agent guide

REST (Synchronous GET)

# 1. Query STO Express origin waybill (extracts final-mile barcode in .message):
curl "https://api.lastscanned.com/v1/track/773192837461528" \
  -H "Authorization: Bearer lsk_live_YOUR_API_KEY"

# 2. Query the extracted Royal Mail barcode:
curl "https://api.lastscanned.com/v1/track/OJ192837465GB" \
  -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 ("Cleared UK customs - Handed over to Royal Mail / Yodel")
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"