Chrome Companion Extension
Live Buy/Maybe/Avoid verdicts injected onto every Amazon UK product page. Profit math in real time as you change the buy price.
Total replaced: £65+/month · Our incremental cost: £0 (included with Tools tier (£59/month))
The Inner Circle FBA Chrome Companion is the extension that should have existed five years ago. It sits in your browser and the moment you land on any amazon.co.uk product page, an overlay strip injects with the live profit math. Type a buy price, watch the verdict flip from amber to green as you adjust. Move on.
Behind the overlay is the same SP-API integration powering the Catalogue Scanner — same live fees, same live Buy Box price, same VAT-aware math respecting your member settings. The verdict logic is identical, so whatever the scanner would say about an ASIN, the extension says too. Use the scanner for bulk research; use the extension when you're already on a retailer site and want to spot-check a single product.
It replaces the £70+/mo combination of SellerAmp SAS plus BuyBotPro that most established sellers run. Free with Tools tier (£59/mo) and above. Open-source friendly — the extension code is auditable in our public repo and ships through the Chrome Web Store with the manifest published.
How it works
- 1
Install from Chrome Web Store
One click — Inner Circle Companion in the store, then "Add to Chrome". Pin the extension icon to your toolbar.
- 2
Connect your membership
Click the icon → "Connect membership" → sign in with Discord. The OAuth callback stores a bearer token; from then on the extension talks to our backend with your credentials.
- 3
Visit any Amazon UK product page
The overlay strip appears in the right column. ASIN, Buy Box price, fees breakdown, profit, margin, ROI, verdict — all live.
- 4
Type your buy price
The verdict updates in real time as you adjust. Green = Compete, Amber = Caution, Red = Avoid. Match the threshold to your target ROI in member settings.
Chrome Companion Extension vs SellerAmp SAS
Frequently asked questions
Why does the extension need to connect to my Discord?
Authentication. We use the same Discord account that gates Inner Circle FBA membership — saves you from a separate account/password to remember. The extension never reads anything from Discord beyond your user ID for membership verification.
What data does the extension send to your servers?
For every product page you visit: the ASIN, your typed buy price, and your bearer token (for membership verification). We never access your browsing history, your other tabs, or any data outside the amazon.co.uk pages where the content script runs. Full privacy policy: /privacy#chrome-extension.
Will the overlay still work if I'm not logged into Amazon?
Yes. The fee data comes from our backend SP-API connection, not your Amazon account. The only thing your Amazon login affects is whether the page itself loads — but you don't need to be logged in to see profit math.
Does it work on the Amazon Seller Central pages?
A subset of features do — primarily the inventory health flagging on the inventory management page. Most of the overlay is targeted at the public product pages (amazon.co.uk/dp/ASIN) which is where 95% of arbitrage research happens.
Can I install it on Edge or Firefox?
Chrome Web Store version works on all Chromium-based browsers (Edge, Brave, Vivaldi, Opera). Firefox would need a separate build — on the roadmap, not yet shipped.
How does this compare to SellerAmp SAS and BuyBotPro?
Feature parity is close — all three give live profit math on Amazon product pages. The differences: (1) ours bundles with the Catalogue Scanner so your settings are shared across tools; (2) ours costs £0 extra if you're already on Tools tier; (3) SellerAmp is the most established, BuyBotPro adds restriction-check automation we don't (yet) have. If you only need browser-side profit math, ours is the right pick. If you need automated restriction discovery, BuyBotPro's still ahead in that specific feature.
Related
Ready to use Chrome Companion Extension?
Tools tier (£59/month) includes this plus the rest of the Inner Circle FBA tool suite.