Yanwen Express Tracking API & MCP

Query live Yanwen Logistics (yanwen, 燕文物流) cross-border package status, scan history, and domestic last-mile exchange tracking numbers in a single synchronous GET request or MCP tool call. lastscanned validates 13-character …YP S10 barcodes and 17-character YW… waybills, returning a normalized TrackingResult JSON payload—with zero Yanwen merchant keys required.

Overview & Quick FactsCopy Anchor Link

Why developers use lastscanned for YanwenCopy Anchor Link

• Skip MD5 signature hashes & bilingual HTML parsing: Yanwen's tracking endpoint requires computing an MD5 payload signature (cyp) with a shared salt and returns HTML <dl> timelines with Chinese category headers (制单完成, 运输途中, 到达待取, 正在派送, 投递成功, 退件, 运单异常). lastscanned normalizes the entire timeline into English JSON in one fetch().
• Automatic domestic last-mile handoff extraction: When Yanwen hands a parcel to a destination carrier like USPS, UniUni, or Royal Mail, lastscanned extracts the exchange tracking number and carrier name into the top-level message field (e.g. "Handed to USPS as 420100019261290312839104827163"), making two-step cross-border tracking effortless.

Tracking Number Formats & Auto-Detection (matches vs mayMatch)Copy Anchor Link

Yanwen is evaluated fifteenth (#15) in lastscanned's two-pass detector:

UPU s10 check digit on …YP numbersCopy Anchor Link

13-character Yanwen numbers ending in YP follow the UPU S10 Mod-11 standard (weights [8, 6, 4, 2, 3, 5, 9, 7] over the first 8 digits), which lastscanned verifies before making any network request.

When is ?carrier=yanwen optional vs required?Copy Anchor Link

• Optional (auto-detected): All valid 13-character …YP S10 numbers and 17-character YW[A-Z]{3}\d{12} numbers.
• Required (?carrier=yanwen): Numeric-only Yanwen customer order numbers or destination-carrier tracking numbers that you want to look up inside Yanwen's system.

Synchronous GET Request & Normalized JSON ResponseCopy Anchor Link

curlCopy Anchor Link

curl -s "https://api.lastscanned.com/v1/track/UL494089685YP" \
  -H "Authorization: Bearer $LASTSCANNED_API_KEY"

JavaScript / TypeScript (fetch)Copy Anchor Link

const res = await fetch("https://api.lastscanned.com/v1/track/UL494089685YP", {
  headers: { Authorization: `Bearer ${process.env.LASTSCANNED_API_KEY}` },
});
const pkg = await res.json();
console.log(pkg.status, pkg.message, pkg.deliveredAt);

MCP track_package tool callCopy Anchor Link

{
  "tool": "track_package",
  "arguments": {
    "tracking_number": "UL494089685YP"
  }
}

Normalized TrackingResult JSON responseCopy Anchor Link

{
  "carrier": "yanwen",
  "trackingNumber": "UL494089685YP",
  "status": "delivered",
  "statusDescription": "Delivered, In/At Mailbox",
  "service": null,
  "deliveredAt": "2026-10-23T18:45:00Z",
  "deliveredAtLocal": "2026-10-23T14:45:00",
  "signedBy": null,
  "destination": {
    "city": null,
    "state": null,
    "country": "United States"
  },
  "estimatedDelivery": null,
  "message": "Handed to USPS as 420100019261290312839104827163",
  "events": [
    {
      "timestamp": "2026-10-23T18:45:00Z",
      "localTime": "2026-10-23T14:45:00",
      "status": "delivered",
      "description": "Delivered, In/At Mailbox",
      "location": "NEW YORK, NY 10001",
      "code": null
    },
    {
      "timestamp": "2026-10-23T10:10:00Z",
      "localTime": "2026-10-23T06:10:00",
      "status": "out_for_delivery",
      "description": "Out for Delivery",
      "location": "NEW YORK, NY 10001",
      "code": null
    },
    {
      "timestamp": "2026-10-19T06:30:00Z",
      "localTime": "2026-10-19T14:30:00",
      "status": "in_transit",
      "description": "Departed from Yanwen Facility",
      "location": "SHENZHEN",
      "code": null
    },
    {
      "timestamp": "2026-10-18T02:15:00Z",
      "localTime": "2026-10-18T10:15:00",
      "status": "label_created",
      "description": "Order processed by shipper",
      "location": null,
      "code": null
    }
  ]
}

Chaining Last-Mile Handoffs (message)Copy Anchor Link

When Yanwen transfers a parcel to a domestic last-mile carrier, lastscanned populates message with:

• "Handed to <Carrier> as <exchangeNumber>" (when both the partner carrier name and exchange tracking number are present), or
• "Handed to the destination carrier as <exchangeNumber>"

Your application or AI agent can extract the trailing tracking number from message and call GET /v1/track/{exchangeNumber} to get live doorstep scans directly from USPS, UniUni, GOFO, or FedEx.

Carrier-Specific Status & Integration NotesCopy Anchor Link

• Explicit [GMT±XX] timezone parsing: Yanwen annotates each scan description with a [GMT+08] or [GMT-04] tag; lastscanned strips the tag from description and uses the offset to compute exact UTC timestamp alongside localTime.
• Up to 35 numbers per batch: Yanwen supports native multi-number lookups, and GET /v1/track?numbers=... accepts up to 35 Yanwen tracking numbers in one call.

Related ResourcesCopy Anchor Link

• Live browser lookup tool: Track a Yanwen package live on lastscanned.com/lookup/yanwen
• Carrier hub: All 31 supported carriers
• Regex & check digits: Tracking number formats & auto-detection
• AI support workflows: WISMO AI agents & synchronous tracking