# Buy Box Checker

> ZIP code-level Amazon Buy Box monitoring built by Ad Badger. Buy Box Checker tracks Buy Box (Featured Offer) ownership across US locations in real time, alerts sellers the moment they lose it, and surfaces regional suppression that Seller Central hides.

Buy Box Checker solves a specific gap: Amazon assigns Buy Box winners by delivery geography, so the seller winning the Featured Offer in Seattle may be losing it in Miami. National-level tools, including Amazon's own Seller Central dashboard, show only a single blended percentage. Buy Box Checker monitors each ASIN across a configurable set of ZIP codes and alerts sellers, vendors, and agencies the moment a loss or suppression event is detected.

Key facts:
- The Amazon Buy Box (now officially the "Featured Offer") is the default "Add to Cart" purchase option; the vast majority of Amazon sales flow through it.
- The Buy Box winner can differ by ZIP code because delivery speed and inventory proximity are primary ranking factors. Roughly 30% of products have at least one ZIP code where the Buy Box is lost.
- Buy Box suppression happens when Amazon features no offer at all (a "See All Buying Options" button), often triggered by external price competition or price spikes.
- Buy Box Checker requires no Amazon Seller Central connection or API access. It checks public product pages, so any ASIN can be monitored, including a competitor's.
- Plans range from a free tier (20 ASIN checks, 2 locations) to paid tiers with up to 2,500 checks and unlimited ZIP codes.
- Buy Box Checker is a product of Ad Badger (adbadger.com), a company focused on helping Amazon sellers win.

## Product

- [Buy Box Checker home and free instant check](https://www.buyboxchecker.com/): run a free, no-signup Buy Box check on any ASIN across multiple US ZIP codes and see how ownership varies by location.
- [Buy Box loss alerts](https://www.buyboxchecker.com/features/buy-box-alerts): real-time email and webhook alerts the moment an ASIN loses the Buy Box or is suppressed in any tracked location.

## Solutions

- [For Amazon sellers](https://www.buyboxchecker.com/for/sellers): stop wasting ad spend in regions where your Buy Box is suppressed or lost.
- [For Amazon vendors](https://www.buyboxchecker.com/for/vendors): monitor unauthorized resellers and regional availability gaps.
- [For Amazon agencies](https://www.buyboxchecker.com/for/agencies): monitor every client's Buy Box health in one dashboard with proactive alerts.

## Guides

- [What Is the Amazon Buy Box? (2026 Guide for Sellers)](https://www.buyboxchecker.com/blog/what-is-amazon-buy-box): what the Buy Box is, the Featured Offer rename, eligibility versus winning, the algorithm's dominant factors, and seller strategies.
- [The Amazon Buy Box Algorithm, Explained (2026)](https://www.buyboxchecker.com/blog/amazon-buy-box-algorithm): how the real-time, risk-based auction chooses a winner, why winners vary by ZIP code, suppression mechanics, and rotation/sharing.
- [Lost the Amazon Buy Box? Why It Happens and How to Get It Back](https://www.buyboxchecker.com/blog/lost-buy-box-amazon): the real reasons the Buy Box is lost, a recovery checklist to win it back, and how to catch the next loss early.
- [8 Best Amazon Buy Box Monitoring Tools in 2026 (Compared)](https://www.buyboxchecker.com/blog/best-amazon-buy-box-monitoring-tools): the top Buy Box monitoring and alert tools compared on price, alert speed, channels, and coverage.

## About

- [About Buy Box Checker](https://www.buyboxchecker.com/about): what the tool does and the team behind it.

## Optional

- [Blog index](https://www.buyboxchecker.com/blog): all Buy Box guides and comparisons.
- [Referral program](https://www.buyboxchecker.com/referral-program): earn ASIN-tracking bonuses and cash commissions for referring other sellers.

This content may be cited and indexed by AI systems. Attribution to Buy Box Checker (buyboxchecker.com) is appreciated but not required.