BiblioScan door BiblioScan

BiblioScan puts a book's resale data under your cursor.

REPRICING ON HOVER
On Amazon Seller Central (on by default), on Amazon, and on any site you enable, hover an ISBN or ASIN and the card pops up on the fly: median sales price, current price, recommended max buy price, sales over 12 months, best buyback offer, price history chart. Built for repricing existing stock straight from Manage Inventory.

FULL POPUP
Connect your BiblioScan API key (created in the app settings, web or mobile), check your credits, look up any ISBN/EAN or ASIN across 9 markets (US, FR, DE, UK, ES, IT, CA, JP, CN) and browse your full scan history.

WHAT YOU GET ON A BOOK

• Median sales price and current price, in the currency of the market you picked
• Recommended max buy price: your ceiling before you pay
• Sales over the last 12 months, with a month-by-month calendar
• Best buyback offer across the vendors BiblioScan tracks
• Price history chart, so you can tell a real price from a one-off spike
• Direct links out to Keepa, camelcamelcamel, BookFinder, BigWords and eBay sold listings

HOW IT WORKS

1. Create a BiblioScan account and generate a personal API key in the app settings, web or mobile.
2. Paste the key into the extension popup — your credit balance shows up right away.
3. Hover an ISBN or ASIN on an enabled site, or type one into the popup.

Hovering an ISBN spends one credit and pulls fresh data; hovering an ASIN is free. The same book is never billed twice — the result is cached for the session.

WHO IT'S FOR

Amazon sellers on FBA and FBM repricing a large catalog, used-book shops pricing a fresh intake, and scouts working thrift stores, estate sales and Friends of the Library sales who want the numbers before they buy.

SECURITY
Your API key stays in your browser's local storage and is never synced. It can't change your password or delete your account, and you can revoke it anytime from the app. Only the ISBN or ASIN you look up is sent to biblioscan.ai — page content is never read or transmitted.

Outside Seller Central and Amazon, the hover card only runs on sites you enable yourself, one at a time, from the popup's Sites tab.

A BiblioScan account is required — create one at biblioscan.ai.