UNITED STATES Marketplace Partners
Unlock the power of Marketplace APIs to manage items, orders, pricing, and so much more.
Action required: The ability for approved Solution Providers to create new Delegated Access keys was retired on July 30, 2026. Existing Delegated Access keys will continue to work until the end of April 30, 2027.
Sellers: Connect directly with your Solution Provider through the Walmart App Store to ensure uninterrupted service.
Approved Solution Providers: Migrate your sellers to OAuth 2.0 by instructing them to reauthorize their app connections using the Connect button in the Walmart App Store.
Start integrating today
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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.
October 12, 2026
Update: WFS inventory logs API We've updated the get inventory log for a WFS item API reference with details on retrieval periods and accessing historical US inventory records.
October 09, 2026
Update: Returns metrics in performance reports The Seller performance report now includes Returns metrics grouped by item condition: New and Collectibles (NEW), and Pre-Owned and Restored (RESOLD).
October 06, 2026
New: Validate promotional pricing in Dynamic sandbox We've added a new Marketplace Dynamic sandbox recipe to create and validate promotional pricing in Dynamic sandbox.
September 28, 2026
New: MCS webhooks for order and return updates Walmart Multichannel Solutions (MCS) now supports webhooks for real-time order, shipment, and return updates.