Is it possible to programmatically check the availability of goods in the online store?

Question

data mining

Is it possible to check the availability of goods in the online store with a request from another site?

Answer 1

Yes.
But this system will have to be individually customized for each online store (except if there are stores on the same engine).
In fact, you are simply imitating the behavior of the visitor/buyer.
It's not very difficult.
Online stores are rarely protected from this.
Here they wrote about API and CORS.
It is not true.
The API, as a rule, is not available in the online store, and it does not need it. After all, his task is simply to sell the goods. It is quite possible to parse through the pages.
CORS is also not a problem, because in order to get information about the availability of goods, you do not need to register, this information is available to everyone.
The problem can only be with those stores that work purely on order and the concept of "goods in stock" does not make sense for them. That is, the goods, as it were, are always there. But until you order it and they call you, you will not know the truth.
But this is not a technical problem, but the policy of the store.