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post/amazon/v1/gtin-to-asin1 credit

Amazon barcode lookup — convert a product barcode (UPC, EAN, ISBN or GTIN) into the matching Amazon ASIN(s). Pass the 8-14 digit code from a physical product and get back the Amazon listing(s) it maps to (ASIN, title, price, rating, image) — for catalog matching, price checks and reconciling SKUs to Amazon products.

Working example
Parameters

The product barcode to look up — a UPC (12 digits), EAN (13), ISBN-10/13 or GTIN-14. Hyphens/spaces are ignored.

Which Amazon site to query (sets language and currency). Dropdown = the 19 verified marketplaces; other Amazon sites (e.g. eg, com.be) and forms like 'amazon.de'/'DE' are also accepted and normalized by the engine.

request preview
curl -X POST https://api.reefapi.com/amazon/v1/gtin-to-asin \
  -H "x-api-key: $REEF_KEY" \
  -H "content-type: application/json" \
  -d '{"gtin":"9780735211292"}'

Hit Send to run this endpoint live.