Every category has a set of valid attributes. Documentation on how to use attributes can be found here: https://connect.marketplace.cdon.com/help/product_data_specification APIs to fetch the attributes can be found here: https://cdonexternalapi-prod-apim.developer.azure-api.net/apis The category can be either a cdon category or a google category. Documentation on how to use categories can be found here: https://connect.marketplace.cdon.com/help/product_data_specification APIs to fetch the categories can be found here: https://cdonexternalapi-prod-apim.developer.azure-api.net/apis The URL to the product on your website in the specified language. The full category path as described by your own product categorization system in the specified language. The condition grade of the pre-owned product. Used (like new) Excellent condition, but has previously been worn or used. No signs of wear or defect. In original box. Used (very good) Very good with minimal or no wear. Or new without original box. Used (good) Minor signs of wear. Item is operational and works as intended. Used (fair) Some signs of wear and tear or minor defects. Item is still usable as intended. Defective The product has been determined defective. See description for more details.