There is a link to the XML file (to a third-party site). There we have 
It is necessary to update the prices and the rest of the goods in our database. In this file there is an id - this is the name of the model and for it there is a retail_price (price) and stock (remainder). Here I need to update these data in my DB.
Perhaps there is a ready-made solution for this purpose (plugin)? I would be very grateful for the answer.