What is an Amazon scraper API, and when do you need one?
An Amazon scraper API is a hosted service that fetches public Amazon pages for you and hands back the content, so your code never talks to Amazon directly. The hard parts of scraping Amazon are not the HTTP request. They are keeping requests from being blocked, rendering pages from the right country, and keeping a parser working when the page layout changes. A scraper API moves all three to the provider.
Roketfy's version goes one step further than returning HTML. Four of the five Amazon endpoints return structured JSON for a specific page type: product detail, seller offers, search results and reviews. The fifth returns raw HTML for any Amazon URL, for the cases where you want to do your own parsing.
You need this kind of API when the data you want belongs to listings you do not own. Amazon's own APIs are tied to a seller or affiliate account and its terms. A scraper API reads the public storefront, so it works for any ASIN on the marketplace you name.