Marketplace Partners
Unlock the power of Marketplace APIs to manage items, orders, pricing, and so much more.
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Popular APIs to help you get started
From managing items to tracking fulfillment — explore our most popular endpoints.
Items
Create and manage item listings on Walmart.com.
Inventory
Keep your item inventory up-to-date.
Promotions
Set promotional item prices for events such as clearance sales or call out comparison prices
Ship with Walmart
Ship with Walmart (SWW) enables sellers to buy shipping at discounted rates directly from Walmart to ship their goods to U.S. customers.
Track your progress
Use testing environments and real-time API status updates to build solutions that last.
What's new?
The latest platform updates — here to help you build with confidence.
Mar 26, 2026
Update: New item spec version New item spec version 5.0.20260205-21_38_48 is available for MP_ITEM, MP_MAINTENANCE, MP_WFS_ITEM, OMNI_WFS feed types. Review attribute and enum updates that close spec gaps and improve item setup, validation, and variant consistency.
March 23, 2026
Update: GTIN Exemption Status API This release adds an optional statusReason field for denied GTIN exemption requests to explain the denial directly in the API response.
Mar 16, 2026
New: Performance notification webhook Receive seller performance alerts and KPI reports in real time with the Performance webhook integration.
Mar 11, 2026
New: Marketplace API Deprecation Guide We have published a new API Deprecation Guide for Walmart Marketplace APIs.