How to handle 3000 REST API requests?

Question

RESTful API

All good.
Please tell me, there is one well-known store with its own REST API. I have 3000 SKUs with which I can generate a request for each product. JSON is returned to me. With what can I process 3000 requests? It is desirable that all this be formed into one output file)

Answer 1

For example: https://www.getpostman.com or JS or anything else that can send a request.