Who delivers SunYou (`SY...`) packages in France?

SunYou hands off French deliveries to La Poste (Colissimo / Lettre Suivie) and Colis Privé after customs clearance.

Why doesn't La Poste recognize my `SY...` tracking number?

`SY...` is SunYou's proprietary SyTrack code; query `GET /v1/track/{number}` to retrieve the French `6A...` or `5W...` barcode recognized by laposte.fr.

SunYou (sunyou)→La Poste (Colissimo) (laposte)

SunYou / SyTrack France Linehaul to La Poste Colissimo & Colis Privé Handoff

How SunYou (SY… / LP…) cross-border e-commerce parcels clear EU customs at Liège or Roissy CDG and hand off to La Poste Colissimo or Colis Privé.

Try a live tracking number:

Barcode transition: SunYou to La Poste (Colissimo)

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

SunYou lookup →La Poste (Colissimo) lookup →Format & check-digit detector →

Origin / middle-mile carrier: SunYou (sunyou)
SunYou SyTrack Barcode (SY… + 11 digits): SY… (13–15 chars)
Origin example: SYFR019283746
Final-mile carrier: La Poste (Colissimo) (laposte)
La Poste Colissimo / Lettre Suivie (6A / 8R / 5W): 6A… / 8R… / 5W…
Final-mile example: 6A19283746199
Extracted in .message: Arrived at France Roissy hub - Handed over to La Poste Colissimo

How the SunYou → La Poste (Colissimo) handoff works

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

1. SunYou Shenzhen export hub & French barcode relabeling: SunYou consolidates lightweight marketplace and DTC parcels in Shenzhen and maps the `SY...` code to a French La Poste (`6A...` / `5W...`) or Colis Privé barcode.
2. Air arrival at Roissy CDG or Liège (LGG): After clearing EU IOSS customs, parcels are injected into La Poste's Roissy/Gonesse PFC hub.
3. La Poste facteur letterbox delivery: Your local La Poste facteur delivers the parcel to your letterbox (`boîte aux lettres`) within 48 hours.
SunYou query: GET /v1/track/SYFR019283746?carrier=sunyou
La Poste query: GET /v1/track/6A19283746199?carrier=laposte

Chain SunYou → La Poste (Colissimo) 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 SunYou origin waybill (extracts final-mile barcode in .message):
curl "https://api.lastscanned.com/v1/track/SYFR019283746" \
  -H "Authorization: Bearer lsk_live_YOUR_API_KEY"

# 2. Query the extracted La Poste (Colissimo) barcode:
curl "https://api.lastscanned.com/v1/track/6A19283746199" \
  -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 ("Arrived at France Roissy hub - Handed over to La Poste Colissimo")
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"