May 7, 2026 release

API	Change Type	Release Date	Description
Simulations	Added	05/07/2026	Added endpoints: `GET /simulations/items` `POST /simulations/items` `GET /simulations/items/{sku}` `PUT /simulations/items/{sku}` `POST /simulations/orders` `POST /simulations/returns` `PUT /simulations/returns` `POST /v1/simulations/orders/{purchaseOrderId}/deliver`
Items	Breaking	05/07/2026	Updated 200 response schema to use `oneOf` and changed response body type in: `GET /v3/items/walmart/search`
Items	Added	05/07/2026	Added optional query parameters in: `GET /v3/items/walmart/search` New params: `asin` `responseFormat`
Items	Changed	05/07/2026	Updated error and payload fields in: `GET /v3/items/walmart/search` Changes include: - Removed optional response property `items` from (200) - Removed optional error response properties (`category`, `causes`, `code`, `description`, `errorIdentifiers`, `info`, `severity`) from (400) and (500) - Added optional response property `error` to (400) and (500)
***	Overhauled	05/07/2026	Updated the Developer Portal Terms and Conditions. Walmart API License Agreement (Rev. 04/17/2026) adds Seller Content Terms of Use for Item Setup Tools (including seller authorization and content responsibilities) and changes governing law and jurisdiction from California to Delaware.