Walmart Adds Seller Performance Data Endpoints
Walmart has added Seller Performance endpoints, providing U.S. marketplace sellers and technology service providers with more detailed performance summaries and order-level data.
What are the key facts?
- 1Walmart added Seller Performance endpoints
- 2Endpoints target U.S. marketplace sellers and technology service providers
- 3Endpoints cover multiple key performance metrics
- 4Multiple reporting periods are supported
- 5Performance management is shifting to order-level issue analysis
What happened?
Walmart added Seller Performance endpoints on September 24, 2026, for U.S. marketplace sellers and technology service providers. The new endpoints provide more detailed performance summaries and order-level data, covering metrics including Negative Feedback, Returns, Item Not Received, and Late Shipment, and support reporting periods of 14, 30, 60, and 90 days.
The change affects cross-border sellers using automated monitoring systems because performance management is shifting from simply viewing an overall score to identifying issues by order, cause, and time window. Sellers fulfilling orders themselves should monitor Item Not Received, Late Shipment, invalid or missing shipment tracking, and clusters of negative feedback. Sellers using WFS or multichannel fulfillment should verify whether Walmart-generated fulfillment statuses match data from third-party warehouses and carriers.
Sellers and service providers also need to update API fields, data mappings, alert logic, and performance dashboards to avoid situations in which risks have emerged on the platform but are not detected promptly in their back-end systems.
What does this mean for cross-border sellers?
For Walmart U.S., performance management is shifting from overall-score review to analysis by order, issue cause, and reporting period. Stores using self-fulfillment, WFS, or multichannel fulfillment should also reconcile platform fulfillment statuses with warehouse and carrier data so risks are detected promptly.
What should sellers do now?
- 1Update performance-monitoring fields for U.S. marketplace stores this week to include Negative Feedback, Returns, Item Not Received, and Late Shipment. Create separate 14-, 30-, 60-, and 90-day reporting views, and complete a field-mapping table and alert-rule checklist.AI Customer Service
- 2This week, review Item Not Received, Late Shipment, invalid or missing shipment tracking, and concentrated negative feedback for self-fulfilled U.S. marketplace orders. Organize affected orders by 14-, 30-, 60-, and 90-day periods and create a detailed table with order numbers, causes, and handling status.
- 3This week, reconcile Walmart fulfillment statuses, third-party warehouse records, and carrier data item by item for U.S. marketplace listings using WFS or multichannel fulfillment. Produce a discrepancy list and mark the order and cause for each discrepancy.