get https://api.fabric.inc/v3/published-products/skus//collections
On your Storefront products are organized or grouped in logical groups called Collections. The main purpose of collection is distribution management by displaying products on your website based on separate browsing structures required to achieve specific merchandising objectives, such as organizational requirements, multi-regional assortments, multi-channel assortments, and collections.
This endpoint gets the collection details of a published product by ID. You can refine your search results by specifying query parameters - collectionIds and collectionRootName.
Note: If you don't have SKU, use the corresponding item ID-based or product ID-based endpoints.