Is there an official Hepsiburada API for product data?
Hepsiburada offers a merchant integration API, and it does what a merchant needs: managing a seller's own listings, stock, prices and orders. It covers that seller's store data only. It is not a way to read another seller's listing, a competitor's reviews, or search results across the marketplace.
The Roketfy Hepsiburada API covers the public side instead. It reads the same product, review, question, search and category pages a shopper sees and returns them as JSON, for any product or seller on the site. You do not need a Hepsiburada seller account, and you do not need to be based in Turkey.