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post/empik/v1/product/variants1 credit
The other editions of the same title — for a book: paperback, hardcover, ebook EPUB/MOBI, audiobook, foreign-language printing; for music: the other formats. Each variant returns its own resolvable Empik product id and URL, so you can feed it straight back into `product/offers`.
Working example
Parameters
Empik product id — the code in the product URL (…/ostatnie-zyczenie…,p1102239921,ksiazka-p → p1102239921). A full product URL is also accepted. Empik uses three id shapes and all work: 'p1102239921', 'prod58904739' and a bare legacy number like '7291'. Every `search` row returns `product_id`.
Advanced: how many times to retry a difficult request (1-8, default 4 — leave unchanged for typical use). (1–8)
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