Walmart Adds Performance APIs: U.S. Sellers Should Integrate Order-Level Diagnostics
Walmart Marketplace added Seller Performance APIs covering negative feedback, returns, Item Not Received, and late shipment, with both aggregated and order-level reports.
What are the key facts?
- 1Walmart released Seller Performance APIs
- 2The APIs target U.S. Marketplace sellers and service providers
- 3The endpoints cover multiple performance issues
- 4Aggregated endpoints and order-level Excel reports are supported
- 5Returns endpoints support multiple conditionType values
What happened?
On September 24, 2026, Walmart Developer released Seller Performance APIs, providing more detailed performance data for sellers and service providers on the U.S. Marketplace. The new endpoints cover negative feedback, returns, Item Not Received, and late-shipment performance, and provide both aggregated endpoints and order-level Excel reports. The returns endpoints support conditionType values including ALL, NEW, and RESOLD. The change does not directly alter fees or performance thresholds, but it will improve the platform’s visibility into seller operating issues, particularly for U.S. sellers using ERP systems, ISVs, managed-service providers, or proprietary data platforms. Sellers can use order-level data to determine whether performance deterioration is related to a warehouse, carrier, SKU, product condition, or customer-service process, and then use the findings for appeals, reshipments, and inventory adjustments. For cross-border sellers, technical teams can integrate the endpoints and associate Item Not Received, late shipment, and returns with warehouse, carrier, and SKU dimensions to locate and handle specific issues.
What does this mean for cross-border sellers?
With Walmart’s new Seller Performance APIs, U.S. Marketplace sellers can access aggregated and order-level data on negative feedback, returns, Item Not Received, and late shipments. Sellers should link the data to warehouses, carriers, and SKUs to identify issues and create appeal, reshipment, or inventory-adjustment actions.
What should sellers do now?
- 1Have the technical team apply for and integrate the Seller Performance APIs this week, and establish aggregated and order-level Excel reporting for the U.S. Marketplace. The acceptance standard is the ability to export negative feedback, returns, Item Not Received, and late-shipment data.AI Customer Service
- 2Match order-level Item Not Received, late shipment, and returns data against warehouses, carriers, and SKUs. For abnormal U.S. orders, produce lists of appeals, reshipments, or inventory adjustments, and mark the handling result for each item.Procurement List