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New: Pre-shipment tracking numbers (WTRN) for WFS Multichannel orders

Date: August 31, 2026

WFS Multichannel Solutions (MCS) orders now include a Walmart Fulfillment Tracking Number (WTRN) when an order is created, before carrier pickup. Order and shipment responses also include URLs for WTRN, carrier, and external tracking. For more details, refer to the Get MCS fulfillment order status API Reference.

What changed

  • Added: preShipmentTrackingNumber in the order response. Returns the WTRN (for example, WTRN123456789012345) when an MCS order is created, before a carrier tracking number is available.
  • Added: wtrnTrackingURL in the order response. Returns a tracking URL where customers can track the shipment using the WTRN.
  • Added: carrierTrackingURL in the shipment object. Returns the carrier tracking page URL after a carrier tracking number is assigned.
  • Updated: externalTrackingURL in the shipment object now uses a consistent URL format: /orders/{orderId}/track/{trackingNo}.

Why it matters

Some marketplaces require sellers to provide tracking information within 24–48 hours of order creation. Previously, carrier tracking information was not available until the order shipped.

WTRN provides a tracking identifier earlier in the fulfillment process, helping sellers provide tracking information before a carrier tracking number is assigned.

Next steps

  • Read preShipmentTrackingNumber from the order response to retrieve the WTRN for newly created MCS orders.
  • Use wtrnTrackingURL when a carrier tracking number is not yet available.
  • After a carrier tracking number is assigned, use trackingNo and carrierTrackingURL for carrier-level tracking.
  • Refer to the Get MCS fulfillment order status API Reference.