get https://externalapi.retailrocket.net/api/3.0/productRecommendations/upsell
The algorithm shows in recommendations products that are as similar as possible to the original product, but more expensive and with improved characteristics. For example, if a user is looking at wired headphones, Upsell's recommendations may include very similar but more expensive wireless headphones. In this case, the advantageous feature of the recommended product is the absence of wires in the headphones. The buyer can compare the current product with the one offered, find this characteristic useful and replace the product with a more expensive one.
Link
linkconsists of a name and a value, in the query string the name and value are separated by a comma, example: link=card,12345, where card is the name and 12345 is the value.