Last updated November 7, 2026. These terms are between you and Seller Syndicate for the Black Book extension and website.
The extension shows, on Keepa pages, what your own Amazon seller account can list, by reading Seller Central in your browser. It is a research aid. Amazon's own pages are the authority; check them before you buy inventory on the strength of a tag.
One account per person. Keep your password to yourself. You are responsible for what happens under your account, including draft applications the extension opens when you leave the auto-draft setting on.
The extension acts within your signed-in Seller Central session, the same way you would by hand. You are responsible for your use of Seller Central and for following Amazon's terms. We are not affiliated with Amazon or Keepa.
New accounts get a 14-day free trial. When paid plans open, the price and billing terms will be shown before you pay; until then an expired trial simply stops the tags. You can cancel at any time; we don't refund partial months.
We try to keep the service accurate and available, but Amazon and Keepa change their pages without notice and the tags can be wrong or late. The service is provided as is. To the extent the law allows, our liability is limited to what you paid us in the previous three months.
Don't resell, share accounts, reverse engineer to bypass the account check, or use the service to overload Amazon's or Keepa's sites.
You can delete your account any time (see the privacy policy). We can suspend an account that breaks these terms.