Filter our tracked-product warehouse - 11 Amazon marketplaces (US, UK, DE, CA, AU, FR, IT, ES, JP, MX, BR) plus Walmart US.

Provide one anchor — any of q (keyword), brand, or category (2026-08-10) is enough on its own. category browses a whole department or sub-category with no keyword (?category=Home & Kitchen); its name is matched in full and case-insensitively against the product's category chain, a name we don't carry returns 422 with the nearest matches, and a category-only browse returns the category's top products by in-category best-seller rank before applying your filters and sort. seller only refines and cannot start a search. Every filter (price/rating/reviews/bsr/fba/seller_count) narrows the anchored set; total_matched is the recall pool so you can see how much your filters and limit cut.