Walmart Seller Performance Report Adds Five KPIs
Walmart is expanding Seller Performance Report metrics. Three KPIs will be available on September 14, while two more are planned for October 19; the Refunds metric has been discontinued.
What are the key facts?
- 1Walmart Seller Performance Report will add five KPIs
- 2Three new KPIs available from September 14, 2026
- 3Returns - New and Returns - Resold planned for October 19, 2026
- 4Refunds metric discontinued and removed from the documentation
- 5Changes apply to specific REPORT-type API integrations
What happened?
Walmart’s developer platform announced on September 11, 2026, that the Seller Performance Report will expand its performance metrics and provide more complete data through the Performance webhook. Starting September 14, 2026, sellers and service providers will be able to access three new KPIs: Negative Feedback Rate, Item Not Received Rate, and Late Shipment Rate. Returns - New and Returns - Resold are scheduled to launch on October 19, 2026. Meanwhile, the Refunds metric has been discontinued and removed from the documentation. The changes apply to API integrations using SELLER_PERFORMANCE_NOTIFICATIONS with the notification type set to REPORT; seller performance alerts using ALARMS are not affected. Cross-border sellers using ERP systems, BI dashboards, automated alerts, or third-party software need to update field mappings, data models, and exception rules. Otherwise, they may encounter interface parsing failures, errors caused by the legacy Refunds field, or delays in identifying late shipments and items not received.
What does this mean for cross-border sellers?
Walmart API integrations using `SELLER_PERFORMANCE_NOTIFICATIONS` with notification type `REPORT` must process the new KPIs and remove the discontinued Refunds field. If ERP systems, BI dashboards, or alert rules are not updated, integrations may fail to parse data or may not identify late shipments and items not received in time; `ALARMS` is not affected.
What should sellers do now?
- 1Review REPORT field mappings in Walmart ERP systems, BI dashboards, and third-party software; add the three available KPIs, remove Refunds, and document the updated field list and test results.AI Customer Service
- 2For stores using `SELLER_PERFORMANCE_NOTIFICATIONS`, reconfigure alerts for Negative Feedback Rate, Item Not Received Rate, and Late Shipment Rate, then complete an API response and exception-trigger test.
- 3Reserve data fields and dashboard space for Returns - New and Returns - Resold, mark their planned launch date as October 19, 2026, and prepare a pre-launch checklist to avoid duplicate rework.