It is one request to read information from Taobao server. so when your customer opens one category page, it is one request. When they open one product page, it might consume 2 to 5 calls, because the product information has been divided into separate pieces.
Also, we always encourage website owners to use cache server, so that the second time users visit will not take any API calls, this will save a lot of API calls.
Where can I check the API calls statistic?
Login to your account, you can see a button "View your API calls"
