Privacy policy

Last updated November 7, 2026. This policy covers the Black Book Chrome extension and this website, operated by Seller Syndicate ("we").

What the extension does

On keepa.com and sas.selleramp.com, the extension reads the product list on the page (ASIN, brand, category) and shows a gating tag on each product. On SellerAmp the brand is read from the product data the SellerAmp page has already loaded; the extension makes no requests to SellerAmp of its own. To find the answer it reads, from sellercentral.amazon.com in your own browser session: the "Add a product" eligibility result for an ASIN, your list of selling applications and their document requirements. With the auto-draft setting on, it opens a draft selling application for a gated product the same way the "Request approval" button does. It never submits an application, uploads a document, places an order, or enters a login.

What stays in your browser

Everything read from Seller Central, Keepa and SellerAmp (eligibility answers, brand unit counts, your applications list) is stored in your browser's extension storage only. It is not sent to us. Exporting a file is something you do yourself.

What we store

• Account: your email address, a hashed password, when the account was created, your plan and trial dates. Needed to sign you in and to know whether your plan is active.
• Entitlement checks: when the extension asks whether your plan is active, our server sees your account id and the time. We do not receive which products you looked at.

Accounts are hosted on Supabase (supabase.com) in the United States.

What we don't do

• We do not see or store your Amazon, Keepa or SellerAmp login, your Seller Central data, or your product research.
• We do not sell or share personal data. No advertising or tracking cookies.

Permissions the extension asks for

• keepa.com, sas.selleramp.com: to draw the tags on the page.
• sellercentral.amazon.com: to read eligibility and your selling applications using your signed-in session.
• Storage: to keep the answers in your browser.
• Active tab, scripting: only used by the optional retail-page analyzer when it is connected to your own sourcing-agent backend.

Deleting your account

Email peter@sellersyndicate.org from your account email and we delete the account and its data within 7 days. Removing the extension deletes everything it stored in your browser.

Changes

If this policy changes materially we update the date above and tell signed-in users on their account page.

Not affiliated with Keepa or Amazon.