How Many? – Amazon Inventory Checker

Amazon sellers can limit their stock. On the Amazon page, the extension answers “how many does a seller truly have, and where?” in seconds. How Many? adds a live inventory readout right on the Amazon product page and pairs it with a daily monitoring dashboard, so you can check any listing in seconds and track it over time.

ON THE AMAZON PAGE
- Live quantity check in the buy box — see how many units are available for the offer you're viewing, right where you shop.
- Every seller, not just the Buy Box — open Amazon's "Other Sellers" panel and the same live check appears on each seller's offer, so you can see any competing seller's available quantity individually.
- Limit Buster — when a seller caps the quantity you can order, see past the cap to the quantity Amazon will actually accept.
- Regional availability map — one click opens a US map showing availability across 8 regions, with Amazon's delivery promise for each.
- Seller comparison — compare two sellers' regional availability and delivery speeds side by side.

IN YOUR DASHBOARD
- Monitor any ASIN daily — price, sales, revenue, number of sellers, stock level, and rating in one table.
- Trends over time — weekly averages and daily history for every monitored product, with one-click daily report export.
- Buy Box analysis — see the ranking factors behind the current Buy Box winner and how your offer compares, factor by factor, on the Buy Box Cheat Sheet.
- Stock analysis, reviews, and alerts for every monitored product.
- AI Visibility (beta) — see how Alexa, Amazon's AI shopping assistant, describes and recommends products like yours across 25 real shopper questions matched to your product.

WHO IT'S FOR
Private label brands, resellers and arbitrage sellers, wholesalers, and agencies who need to know what competitors actually have — and when it changes.

GOOD TO KNOW
- Free 14-day trial, no credit card required. Advanced features require a paid plan.
- An account is required — your checks and monitored products sync to your dashboard at app.howmanyextension.com.
- Built for Amazon.com product pages.
- Tracking Amazon inventory since 2016.

Questions or help: [email protected]

LIMITATIONS:

-Current version does not work on some amazon Europe countries
-If a seller is merchant fulfilled and is limiting their quantity we can only get the available quantity amazon returns which may or may not be limited (Limit Buster only works on FBA Stock).