The eBay Commerce Catalog API allows you to search the eBay catalog for products. It provides a way to retrieve a product record by its eBay product identifier, to submit a catalog change request to modify an existing product or create a new product, and more. This API is currently in Beta with updates and new features to be added. It provides a way to assist sellers in finding products in the eBay catalog that correspond to items that sellers want to offer for sale. eBay is an online marketplace.