get https://marketplace.walmartapis.com/v3/items/walmart/search
The Item Search API allows you to query the Walmart.com global product catalog by item keyword, UPC or GTIN. You can review all item information provided in the response, so you can decide whether or not you want to sell this item.
You must specify at least one query parameter, either: 'query', 'gtin', or 'upc'. If there are more than one item in the catalog, the search returns the first 20 items in the response.
Additionally, you can use the information provided in the 'relatedQueries' response parameter to run a new search for similar items.
Throttling:
For details on throttling, refer to the Walmart throttling documentation.