How to track STO Express (Shentong) France parcels handed off to La Poste Colissimo & Colis Privé

STO Express (`sto`) consolidates cross-border e-commerce orders in China (`77...` 15-digit waybill or `STO...`), clears EU customs via Roissy CDG or Liège, and injects French parcels into La Poste Colissimo (`6A...` / `8R...`) or Colis Privé.

Try a live tracking number:

Barcode transition: STO Express to La Poste Colissimo (France)

When STO Express clears customs and hands off to La Poste Colissimo (France), lastscanned surfaces the secondary tracking number in the top-level message field.

Origin / middle-mile carrier
STO Express (sto)
STO Express 15-digit / International Waybill
^(77[0-9]{13}|STO[A-Z0-9]{10,15})$
Origin example
773049281940298
Final-mile carrier
La Poste Colissimo (France) (colissimo)
La Poste Colissimo 13-character Barcode
^[0-9A-Z]{2}[0-9]{9}[0-9A-Z]{2}$
Final-mile example
6A24839104945
Extracted in .message
Last-mile carrier: Colissimo (6A24839104945)

How the STO Express → Colissimo handoff works

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

1. STO Origin Collection & Export Consolidation
STO Express collects the parcel in China (`77...` 15-digit barcode) and generates a linked French La Poste Colissimo (`6A...` / `8R...`) label.
2. Air Linehaul & EU IOSS Customs Release
Consolidated air cargo lands at Paris CDG or Liège (LGG), clears EU IOSS customs, and trucks to a Colissimo sorting platform in Île-de-France.
3. La Poste Colissimo Delivery
Colissimo scans `Votre colis est pris en charge par La Poste` and delivers the parcel to your boîte aux lettres within 24–48 hours.
Dual-Label Pre-Advice
La Poste displays `Votre colis est prêt à être expédié` until STO completes export air freight and customs release.
Unified API Resolution
Querying `GET /v1/track/{number}` merges STO Express export scans with La Poste Colissimo French delivery events.

Chain STO Express → Colissimo 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 STO Express origin waybill (extracts final-mile barcode in .message):
curl "https://api.lastscanned.com/v1/track/773049281940298" \
  -H "Authorization: Bearer lsk_live_YOUR_API_KEY"

# 2. Query the extracted La Poste Colissimo (France) barcode:
curl "https://api.lastscanned.com/v1/track/6A24839104945" \
  -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 ("Last-mile carrier: Colissimo (6A24839104945)")
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"

STO Express to La Poste Colissimo France Handoff Tracking FAQ

How long does STO Express take to deliver to France via Colissimo?
Typical delivery from China to metropolitan France takes 7 to 11 calendar days.
Why does La Poste say 'Il n'est pas encore pris en charge' on my STO parcel?
STO creates the Colissimo label electronically when the package leaves China; La Poste updates the scan once the physical pallet arrives at its French sorting center.
Does Colissimo leave STO Express packages in the mailbox?
Yes—standard `6A...` and `8R...` Colissimo e-commerce parcels are delivered directly into your boîte aux lettres (`sans signature`).

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