Search J.Crew or J.Crew Factory products

Searches the product catalog for either storefront (select with site, default jcrew). Returns product summaries with USD pricing, gender, and a description, plus the search index's own facets (gender, fabric, category, size, color, price range, and others) with live per-option counts. sort selects relevance (default), price_asc, or price_desc. filter narrows results by one or more facet name:value pairs (comma-separated, e.g. productGender:Men,styleFabric:Cashmere) taken from a prior response's own facets[].name/facets[].options[].value fields -- not curated against a fixed list, since the facet set is large and can change. This is best-effort relevance, not a guaranteed keyword match: for an obscure alphanumeric keyword the search index falls back to its own semantically-related results instead of an empty list, and there is no reliable field in the response to distinguish a true keyword match from that fallback.