QXL is a Danish online auction site. It is the Danish brand of the Tradus company, operating a similar business to eBay. The QXL Ricardo APIs give developers access to the ecommerce platform's functionality. This functionality includes retrieving site configurations, categories, listing fees, promotional fees, state and payment conditions and configuration values for offers. Users can upload auctions, fixed price articles and classifieds and can download and manage articles from the MySelling section. The API uses SOAP calls and responses are formatted in XML.