From Amazon page to answer in one click.
Amazon sellers can limit their stock. On the Amazon page, the extension answers “how many does a seller truly have, and where?” in seconds. In the dashboard, the products you track are captured every day across all 8 US regions so you can analyze them based on trends.
On the Amazon page
Every check happens right where you shop.
Install and sign in
Add How Many from the Chrome Web Store and create your account — the 14-day free trial starts immediately, no card required. Your checks and tracked products sync to your dashboard at app.howmanyextension.com.
Open any Amazon product page
The widget appears in the buy box, right under the quantity selector, and shows how many units Amazon says are ready to ship per the shopping cart. It works on every seller’s offer inside “Other Sellers” too.
Click Bust limit
When a seller caps how many you can order, the widget shows the cap. Click Bust limit and Limit Buster shows the quantity behind it — the number a purchase limit hides.
Click Bust Limit per Region
The pin icon opens the Geo View in a new tab: availability across 8 US regions with Amazon’s delivery promise for each — seller A is the Buy Box winner, seller B cycles the others, Compare shows both side by side.
Track it
Click the star to track the product. From here on it’s captured every day in your dashboard. You will be able to gather a history of changes and set alerts for the most important ones.
In the dashboard BETA
Track it once. Watch it every day. — Shelf Intelligence is live today; AI Visibility is in beta; Brand Protection is in early access.
Track a product in three steps.
Click Track a product, paste your ASINs (or upload a CSV), and choose the modules each product should be enrolled in. Marketplace, brand and any module setup are handled in the guided walkthrough inside the dashboard — you don’t need anything else to get started.
In the dashboard, click + Track a product at the top of the sidebar.
Comma- or line-separated, or drop a CSV. Anything invalid, not found, or already tracked is flagged before you continue.
Enroll each product in AI Visibility, Shelf Intelligence, Brand Protection — any combination. The dashboard walks you through the rest.
One stream, every module.
Coupons detected on your listing, sponsored placements on your product page, MAP undercuts with screenshots captured, stock-outs with the Buy Box lost in the same capture, Alexa rank slips, and opportunities — a competitor out of stock whose questions are contestable now. Filter by module, severity, region and product.
Digests on your schedule. Notifications the moment it happens.
Two delivery models, kept separate on purpose. Scheduled digests are a designed summary on the days you choose. Event notifications are a ping the instant an event fires — by email or Slack, per module.
- Daily or weekly digests to the recipients you list
- Instant notifications for AI Visibility, Shelf Intelligence and Brand Protection events
- Export any table as PDF or Excel from its own page
Configure the brand once; every module reads it.
Three questions: who is the brand (name, storefront, aliases Alexa should recognize), which sellers may sell your products, and which claims and compliance rules recommendations must respect. Agencies and aggregators can hold several brands in one account and filter the dashboard by brand.
What the number means
How Many reads how many units Amazon will accept for a specific seller’s offer, right now, in the region you’re checking. It’s the practical answer sellers need — how much of a competitor’s stock is actually reachable — even when the seller has hidden it behind a quantity limit.
Watch it work in 30 seconds.
Bust a limit, open the regional map, done.
See what your competitors actually have.
Start your 14-day free trial. No credit card needed.
Start free trial