Know the second a competitor steals your buybox.
A free Chrome extension for Amazon Vendors. It opens your product pages in the background, reads the buybox, and alerts you the moment someone other than you (or Amazon) wins it — across 9 marketplaces.
Free · 9 Amazon marketplaces · Requires an Epinium account
What our clients say
Buybox monitoring that runs itself
Point it at your Epinium vendor connections once. The extension checks every product on your schedule and only pings you when something is wrong.
Set it once, never miss a buybox loss again
Log in with your Epinium email, grant access to your Amazon marketplaces, and let it work.
The moment you lose the buybox, you know
- Competitor name in the alertSee exactly who took the buybox — seller name, ships-from and availability, straight from the Amazon offer block.
- Only pings on problemsNo noise. You hear from it when a competitor wins the buybox, not on every routine check.
- Stacked run historyEvery check is kept by date and time so you can see when the loss started and how long it lasted.
Runs quietly in the background, every day
- Scheduled daily scanPick the hour; the extension opens each product page in the background and reads the buybox for you.
- Human-like pacingConfigurable random wait between products so Amazon sees normal browsing — fewer CAPTCHAs, safer runs.
- Product list from EpiniumYour ASINs and marketplaces come straight from your Epinium account — nothing to import or maintain by hand.
Your data never leaves your browser
- Local-only resultsBuybox results and settings are stored in your browser, not on external servers, and wiped when you log out or remove the extension.
- Reads public data onlyIt never touches your browsing history or non-product pages — just the public offer block on your own Amazon listings.
- No trackers, no resaleNo third-party analytics or advertising tools, and your data is never shared or sold.
Stop losing the buybox in silence
Install the free extension and get alerted the moment a competitor wins.
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ExploreFrequently Asked Questions
Is the extension free?
Yes, completely free. You only need a free Epinium account to log in — the extension pulls your product list from it.
Does it work with Amazon Vendor Central?
Yes — it is built for Vendors. Only your vendor connections are scanned; seller products are ignored.
Which marketplaces are supported?
Nine: amazon.com, .es, .de, .co.uk, .it, .fr, .se, .pl and .nl. Grant access to the ones you sell on and it monitors them all.
Where is my data stored?
Only in your browser. Buybox results and settings never go to an external server and are deleted when you log out or remove the extension.
Do I need to keep Chrome open for the daily check?
Yes. The scheduled scan runs inside Chrome, so the browser must be open at the hour you set.
Will it get my Amazon account flagged?
It reads only the public offer block and waits a configurable, random time between products so it looks like normal browsing. Higher waits mean slower but safer runs.
