Search and compare products across Brazilian marketplaces (Mercado Livre, Shopee, AliExpress) in one call: normalized BRL prices in cents, canonical + affiliate links, free-shipping flag, rating and sold count. Per-marketplace `sources` state and `data_as_of` ship with every response, so a degraded or unconfigured marketplace is visible, never silent. Pass `rerank=true` to drop accessories and same-word-different-product offers (+~400ms).