get https://externalapi.retailrocket.net/api/3.0/productRecommendations/relatedWithCurrentVendorColdStart
The algorithm returns related product items with priority for products from the same vendor as the product being viewed. For this algorithm to work, the 'Vendor' parameter must be present in the product database.
Link
link
consists 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.