Walmart

Walmart through HasData

Three tools. Search takes q, while the product and review tools take either itemId or the product url. Pass one of the two, not both.

A price belongs to a store

Walmart answers for one store, and the response names it in searchInformation.storeId and in fulfillment.message. An item that is in stock nationally can come back unavailable because it is unavailable at that store. When the task compares prices, fix the store deliberately and report which one the numbers came from.

Paging stops early

Results dry up after roughly page ten, and the extra pages come back empty rather than erroring. A broad keyword cannot be enumerated by paging, so narrow it with filters such as minPrice, maxPrice, catId or deliveryType instead of walking deeper.

Two totals, both correct

searchInformation.totalResultsDisplay is the string Walmart prints, such as 1000+. pagination reports what you can actually reach. Quote the second when you promise a count you can deliver.

Ratings are not reviews

The product tool reports reviews.totalReviews, which counts ratings. The reviews tool returns written reviews, and the two numbers rarely match. Say which one you are quoting.