Last Updated: Sep 21, 2026
Every inventory update sent to the Walmart Marketplace API must include fulfillmentLagTime, the number of days between order and shipment for the SKU. InfiPlex Inventory & Order Management System (OMS) handles this field for you on every update, and you keep control of the value inside Walmart Seller Center.
How InfiPlex Handles fulfillmentLagTime
Before InfiPlex sends an inventory update for a Walmart SKU, it first reads the SKU's current fulfillment lag time from Walmart, then includes that value in the update call. Walmart's inventory API reference describes the field.
Because InfiPlex always reads the live value, there is nothing to configure in InfiPlex. Set or change lag time per SKU in Walmart Seller Center and the next InfiPlex inventory update carries it.
Set-up Support
Contact InfiPlex with any Walmart questions. Support is included with every InfiPlex package.
