Seller & Buy Box Monitoring for US Marketplaces.
The Buy Box drives the vast majority of marketplace sales — and it changes by the hour. We track who wins the Buy Box on Amazon and Walmart, your win rate over time, and every competing seller and offer, so US brands and sellers know exactly where their sales are going.
If you don't own the Buy Box, you don't make the sale.
On Amazon and Walmart, the seller who holds the Buy Box gets almost all the orders for that listing. But Buy Box ownership shifts constantly — a competing seller drops their price, switches to faster fulfillment, or undercuts you for a few hours overnight. Without continuous tracking, sellers cannot tell their true win rate, cannot see who is taking the Buy Box, and cannot react in time to win it back.
Buy Box intelligence that wins back sales.
This is decision-ready Buy Box data — built so your pricing and marketplace teams can act before sales move to a competitor.
A clear, measured Buy Box win rate per ASIN over any time window.
Buy Box ownership and competing offers captured every hour.
From your ASIN list to a validated Buy Box monitoring pilot.
Every signal behind the Buy Box outcome.
We deliver structured fields engineered for sellers, brands and pricing teams on US marketplaces.
Buy Box winner
The current Buy Box seller on each listing, captured every refresh.
Buy Box win rate
How often you hold the Buy Box per ASIN, over any period.
Buy Box price
The price attached to the winning offer at each point in time.
Fulfillment type
Whether the winning offer is FBA, FBM, WFS or seller-fulfilled.
Competing offers
Every other seller's price, condition and fulfillment on the listing.
Seller ratings
Feedback score and rating of each competing seller.
Buy Box suppression
Detection of listings where no Buy Box is shown at all.
Ownership timeline
A full history of Buy Box changes for analysis and reporting.
The US marketplaces where the Buy Box decides sales.
Need more US marketplaces?
We can extend Buy Box and seller tracking to additional US marketplaces in a later phase, all reporting into one unified feed.
What US sellers do with Buy Box intelligence.
One Buy Box monitoring feed supports repricing, channel strategy and seller management.
Win-rate tracking
Measure your true Buy Box win rate and set targets per ASIN.
Repricing triggers
Feed Buy Box loss signals into your repricing engine instantly.
Competitor analysis
See which sellers take your Buy Box and how they do it.
Fulfillment strategy
Judge whether FBA or FBM is winning the Buy Box in your category.
Suppression alerts
Catch listings that lose the Buy Box entirely and lose sales.
Seller scorecards
Report Buy Box performance to leadership by SKU and channel.
This is what your team receives.
Clean, validated rows tracking Buy Box ownership and offers per listing. Fields are customized to your account — example schema below.
seller_buy_box_monitoring_sample.csv
● LIVE SCHEMA
| ASIN | Buy Box Seller | Buy Box Price | Fulfillment | You Have BB? | Competing Offers | Detected (UTC) |
|---|---|---|---|---|---|---|
| B07ABC4421 | YourStore | $129.00 | FBA | Yes | 6 | 2026-05-19 09:00 |
| B07ABC4421 | PriceKing | $124.50 | FBA | No | 7 | 2026-05-19 14:00 |
| B07DEF8890 | — | — | — | No | 4 | 2026-05-19 14:00 |
From ASIN list to live Buy Box monitoring.
A simple five-step path — and you talk directly to the engineers building your pipeline.
Send your ASINs
Share your ASINs or listing URLs and your own seller name.
We configure tracking
We set up Buy Box and competing-offer capture per marketplace.
Hourly refresh
Buy Box and offers captured hourly, with win rate calculated.
You receive data
Clean output via CSV, JSON, API or dashboard.
Alerts trigger
Notifications fire the moment you lose the Buy Box.
A US-focused Buy Box monitoring partner.
We focus on US marketplaces and US response hours — so your team gets fast pilots and Buy Box data tuned to how Amazon and Walmart actually award the Buy Box.
Hourly tracking
Buy Box ownership captured frequently enough to act on.
True win rate
A measured win-rate metric, not a guess from spot checks.
Repricing-ready
Clean signals your repricing engine can consume directly.
Loss alerts
Your team is notified the moment the Buy Box slips away.
About seller & Buy Box monitoring.
Buy Box monitoring tracks which seller wins the Buy Box on a marketplace listing over time, along with their price and fulfillment type. It tells a brand or seller how often they own the Buy Box and who is taking it from them.
Yes. By capturing the Buy Box winner at every refresh, we calculate your Buy Box win rate per ASIN over any period, so you can see exactly how often you hold the Buy Box and where it slips.
We cover Amazon and Walmart Marketplace as standard, and can add eBay and other US marketplaces on request. Each is tracked with its own seller and Buy Box schema.
Yes. We capture every competing seller on a listing — their price, fulfillment type, condition and rating — so you can see who you are losing the Buy Box to and why.
Buy Box and offer fields can be refreshed hourly for most listings. Higher-frequency tracking is available for high-velocity ASINs. We confirm a realistic cadence before the pilot.
We deliver CSV, JSON and Parquet files, REST API endpoints, SFTP and cloud destinations, plus an optional dashboard with Buy Box win-rate trends and seller alerts.
Know your real Buy Box win rate on US marketplaces.
Send us your ASINs and we'll return a sample Buy Box monitoring dataset — winner, win rate and competing offers — within 1 business day.
Often paired with Buy Box monitoring.
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