Keepa
Fresh Amazon data for supplier UPCs and ASINs, from the Keepa API and the Keepa portal.
Keepa API
Clear the backlog in the Keepa portal
Faster than the API for large lists: copy codes into Keepa Product Viewer, then bring its exports back here.
Copy codes
Paste them into Keepa Product Viewer. Up to 10,000 at a time.
Paste the codes Keepa could not load
Opens after you copy codes.
Drop the Keepa exports
Both files at once, UPC to ASIN and the bulk market export. The type of each file is detected.