Although eBay has a separate listing page for each listing, it does have a product catalog. Tapping into the product catalog when creating a listing will pull basic product information from the catalog, like description and images, and will select a category for your listing.
The catalog can be search by different product identifiers, including the eBay Product ID, UPC, ISBN, Model # or Model Keywords. After locating the product, you can select it, then add shipping details and list your item. Although the information comes form the catalog, a separate listing page will be created for you listing.
Please note: not every listing on eBay is in the eBay Product Catalog (products become included through seller's request) and not every product identifier is on every product. For example, many products may not have a UPC or Model #.
SellerCloud can access the eBay product catalog.