As of Jan 23, 2019, Amazon has limited the use of Product Advertising API. Now, I am trying to write a script that can fetch product information using ASIN using their official APIs.
How can I use MWS API for this purpose? And what are the differences between the Product Advertising API and MWS API?
After some research, here's what I found:
Product Advertising API (PA API) is offered by Amazon to get product information with POST requests. However, the throttle limit depends upon the affiliate sales made by your account in the last month [as of 23rd Jan 2019].
You won't be able to make any request if you have zero sales. In that case, the only way to pull data is scraping.
MWS API (available to sellers) on the other hand can only be used to retrieve your products only. You can't use MWS API to get product information from other suppliers.