Try the Chewy Search Facets API

- The `Brand` dimension (`facets[].value` == `"brand_facet"`) is effectively Chewy's brand directory for the requested listing -- every brand carrying at least one matching product, with its product count. A top-level department returns thousands of brands (e.g. `group_id=288`, Dog, returns over 3,000). - `options[].seo_hvf_slug`, present on brand options Chewy publishes a landing page for, is that brand's own `chewy.com/brands/<slug>-<id>` page slug (e.g. `acana-dry-dog-food`) -- Chewy's canonical brand name for URL purposes. It is scoped to the listing being refined (ACANA is `acana-dry-dog-food` under `group_id=294` but `acana-dog-food` under its parent `332`), and Chewy publishes one for far fewer brands at department level than at sub-category level. `options[].url_slug` is the equivalent for a sub-category option. - `options[].id` is Chewy's own internal id for the option, omitted where upstream has none (the synthetic Category, Price and Customer Rating dimensions). - Every `facets[].value` paired with one of that facet's `options[].value` is a ready-to-use `filter` `key:value` pair for this endpoint, `/chewy/category`, and `/chewy/search` alike. When `facets[].value` is `"categoryId"`, each `options[].value` is also a ready-to-use `group_id`. - `total` is the number of products the requested listing matches (after any `filter` is applied). `count` is the number of facet dimensions returned. - A `group_id` Chewy does not recognize returns a `404` rather than an empty option set. A `q` that matches nothing returns `200` with an empty `facets` array and `total` of `0`. - The facet dimensions vary by listing -- a food category exposes flavor/ingredient/special-diet dimensions a toy category does not.