For instance : https://developers.kelkoogroup.com/app/documentation/navigate/_publisher/shoppingAPIPublic/_/_Features_OfferFeeds/Request#compressed-data or https://developers.kelkoogroup.com/app/documentation/navigate/_publisher/shoppingAPIPublic/_/_/Changelog#2021-12 If you open this on an empty page, you need to refresh the browser so that it's taken in account