Walmart Marketplace API Updates On-Demand Reports Endpoint
On October 1, 2026, the Walmart Marketplace API changed the specifications for its on-demand reports endpoint, affecting sellers that connect to the platform through software or custom systems.
What are the key facts?
- 1Walmart Marketplace API updated the on-demand reports endpoint on October 1, 2026
- 2Updates cover date formats, frequency fields, idempotency keys, and error-response specifications
- 3Primarily affects sellers connecting to Walmart through an ERP, store management software, or custom system
- 4Amazon’s TIPS peak-season inventory program runs from October 1 to December 31, 2026
- 5Amazon’s TIPS program is available only to invited U.S. marketplace sellers
- 6Related removal-fee discounts may continue through April 30, 2027
What happened?
The source states that the Walmart Marketplace API made updates directly related to seller operations on October 1, 2026. The changes target the on-demand reports endpoint and cover date formats, frequency fields, idempotency keys, and error-response specifications, primarily affecting sellers that connect to Walmart through an ERP, store management software, or a custom system.
The source also mentions Amazon’s TIPS peak-season inventory program, which runs from October 1 to December 31, 2026, but is available only to invited U.S. marketplace sellers. Removal-fee discounts related to the program may continue through April 30, 2027.
What does this mean for cross-border sellers?
On October 1, 2026, the Walmart Marketplace API updated its on-demand reports endpoint. Sellers using an ERP, store management software, or a custom system may encounter incompatibilities in report requests, data parsing, or exception handling. Prioritize checking the date formats, frequency fields, idempotency keys, and error-response specifications. Invited U.S. marketplace sellers should also monitor Amazon’s TIPS peak-season inventory program, running from October 1 to December 31, 2026, and the related removal-fee discounts.
What should sellers do now?
- 1This week, inspect the ERP, store management software, or custom system connected to Walmart; verify the on-demand reports endpoint’s date formats, frequency fields, idempotency keys, and error-response specifications item by item; then produce a gap list confirming that each item has a handling plan.Listing character checker
- 2In Walmart’s test environment or a low-risk workflow, initiate an on-demand reports request and verify that the updated request and error responses are parsed correctly by the system. After completion, retain the successful response, exception logs, and rollback instructions for technical and operations review.