Ask Your AI Assistant Where You Are Losing the Buy Box
Then let the Badger dig. Connect Buy Box Checker to Claude, ChatGPT, Cursor, or whatever you already use, and ask about your own Amazon data in plain English: the Buy Box, and the stock, delivery, rank, reviews, promotions and page changes behind it. The connector works on every plan including free: one standard MCP endpoint, secured with OAuth.
One Minute Setup
Sign in with your normal Buy Box Checker login over OAuth. No API keys, no config files.
Answers in Seconds
Every answer comes from the checks already stored in your account, not a fresh scrape.
Every Location at Once
The Buy Box is decided per delivery location. Ask about all of them in one question.
Read only, always. It can look at every brand, product and location you track and change nothing. There is no tool that edits, deletes, pauses, or spends.
Free plan available. A card on file is required but never charged.
Why Buy Box MCP
The Answer Is Buried in a Table You Have to Go Look At
The Buy Box is decided per delivery location, so the truth about one product is spread across every ZIP code you track. That is a lot of rows to read on a Tuesday morning. Asking a question is faster than finding the row.
45.4%
of every product we track currently has at least one location where the Buy Box is lost or suppressed.
- Products in sample
- 1,774
- Positions not currently winning
- 33.9%
- Delivery locations
- 116
More Than the Buy Box
Everything We Track, One Question Away
Every daily check records far more than who won the Buy Box. Your assistant can read all of it, for every product and every location you track.
Buy Box by Location
Who holds it in every city and ZIP code you track, at what price, and for how long.
Price and Competing Offers
The Buy Box price over time, and the other sellers' offers and prices where you are losing.
Delivery Speed
How many days until the fastest and the free delivery, in each location.
Stock
In stock, low stock and out of stock per location, with the quantity when Amazon shows one.
Best Sellers Rank
Rank and category every day, with the biggest movers up and down.
Rating and Reviews
Star rating and review count over time, since the day you started tracking.
Bought in Past Month
Amazon's 'X+ bought in past month' band, and how it moves.
Promotions
Crossed-out prices, deal end dates, coupons and Subscribe & Save prices, as recorded at each check.
Badges
Amazon's Choice and #1 Best Seller, won and lost.
Product Page Changes
Titles, bullets, descriptions, images, categories, variations and video, edit by edit.
Alerts
Buy Box losses (suppression included), hijackers, sales rank drops, badge and stock changes.
Most of It, Back in Time
Buy Box, price, delivery, stock, rank, reviews and more by day, week or month, back to the first check we stored.
Product page changes and the stock change list are on paid plans. Promotions are recorded from October 27, 2026; which promotion fields appear depends on the marketplace.
Try It
Questions You Can Ask on Day One
Every one of these is answered from your own stored data. Nothing here is a live scrape, so answers come back in seconds and cost you nothing.
Where am I losing the Buy Box right now?
Here are the products where another seller holds the Buy Box in at least one of your locations, worst first, with who holds it and at what price. [live answer from your account]
Find Where You Are Losing
Start wide and let the answer narrow itself, instead of clicking through brands one at a time.
- “Where am I losing the Buy Box right now?”
- “Has anyone other than me held the Buy Box on any of my products this month?”
- “Has anyone hijacked my listings this week?”
- “Are any of my ASINs suppressed right now, and since when?”
- “Which brand has my worst Buy Box win rate, and why?”
- “Which locations do I struggle in the most?”
Diagnose One Product
The Buy Box is decided per location, so a single product is really a map. Ask about the map.
- “Which ZIP codes am I winning and losing on B073WJMKHN?”
- “Who took the Buy Box on my worst ASIN, at what price, and for how long?”
- “What is the estimated revenue I am losing on this ASIN?”
- “How fast is delivery on this product compared to the seller beating me?”
- “Show me my weakest ASINs by 30 day win rate.”
Stock and Delivery
For a brand that makes its own products, this is the everyday question: can shoppers get it, and how fast?
- “Which products went out of stock or ran low this week, and in which locations?”
- “Was my top ASIN in stock in Toronto all month?”
- “Is this ASIN out of stock anywhere right now?”
- “Where is delivery slowest on my best selling product?”
- “Which locations see a delivery date more than 5 days out?”
Listing Changes
Amazon and other sellers can edit your product pages without telling you. Ask what changed.
- “Did anything change on my product pages this week: title, images, bullets, description?”
- “Show me the full change history for B073WJMKHN.”
- “Did my variations change, and were any sizes or flavors dropped?”
- “What product pages changed on August 4th?”
Demand and Reputation
Trends, not snapshots. Every answer here comes from stored history rather than a fresh scrape.
- “Which of my products improved or dropped in Best Sellers Rank over the last 30 days?”
- “How have my review count and rating moved since I started tracking?”
- “Has the 'bought in past month' number moved over the last 90 days?”
- “Show me every sales rank drop alert from the last 7 days.”
Pricing, Promotions and the Big Picture
What shoppers were charged, what the competition did, and one summary of the day.
- “What Subscribe & Save price did Amazon show for my products this month?”
- “Has my price on Amazon changed, and when?”
- “Did anything change after my competitor dropped their price?”
- “How has my Buy Box win rate trended over the last 30 days?”
- “Summarize everything that went wrong on my account yesterday.”
Listing changes and the stock change list are on paid plans, and so are locations outside the US such as Toronto.
Honey badgers famously don’t care. Ours cares about exactly one thing: who has your Buy Box.
It checks every product in every location you track, every day, and keeps the history. You just ask.
Ask About Any Date Since Tracking Began
Your assistant can look back to the first check we stored for a product, by day, week or month, for one location or all of them. It can see who held the Buy Box and for how long, how your review count grew, the ‘bought in past month’ band, and whether your own offer was in stock.
“Who took my Buy Box in Austin last month, and for how long?”
Your assistant asks for one location and one month, and gets back each stretch of time a seller held the Buy Box there, from when to when.
“Which sellers held my Buy Box this quarter, and what share did each get?”
Each seller's share of the checks, period by period, plus one summary for the whole range. Your own wins are labelled with your brand name.
“Show my weekly win rate since tracking began.”
Any range back to the first check we stored for that product, grouped by day, week or month, for every location or just one.
“How did my review count grow since January?”
The review count Amazon showed in each period, so you can see when reviews came in fast and when they stalled.
“Was I in stock in Miami in July?”
Your own offer's stock reading in that location over time, and every out of stock, low stock and back in stock event. A day when another seller held the Buy Box has no reading, because the page then describes their offer, not yours.
“Has the 'bought in past month' number on my listing moved since spring?”
The band Amazon printed in each period, such as 1K+ bought in past month, on listings where Amazon shows one.
History comes with every plan, the free plan included. It starts on the day you began tracking a product in a location, so a product added last week has a week to look back on. Read what is new in the connector.
The Tools
Eleven Read Only Tools
You never call these by name. Your assistant picks the right one from your question. They are listed here so you know exactly what the connector can and cannot see.
Account and Brands
Account Overview
get_account_overview
Tracked ASINs, owned, lost and suppressed counts, 30 day win rate, alerts from the last 7 days, and plan usage.
Every Brand
list_brands
Every brand with its marketplace, tracked counts, and win rate. Brands are country containers, so amazon.com and amazon.co.uk are separate.
One Brand in Depth
get_brand
One brand in depth: strong and weak ASINs, best and worst performer, shipping speed, and the 30 day win rate trend.
Products and History
Filter Your Catalog
list_asins
The filterable table as a tool. Filter by status, win rate, Prime eligibility (amazon.com listings only), or free text, and sort by win rate, price, sales rank, delivery days, rating, reviews, or last check.
One Product, Every Location
get_asin
One product across every tracked location: who holds the Buy Box, at what price, delivery speed, stock text and quantity, sales rank, badges, Prime eligibility (amazon.com listings only), and competing offers.
Full History
get_asin_history
Series for win rate, price, delivery days, rating, sales rank, competitor pricing, who held the Buy Box, review count, Amazon's 'bought in past month' band and stock, over any range since tracking began, by day, week or month.
Movement and Alerts
Sales Rank Movers
get_bsr_movers
Which products improved or declined in Best Sellers Rank over a window, ranked by the size of the move.
Alerts
list_alerts
Buy Box losses (suppression included), hijackers, sales rank drops, badge changes, and stock changes, deduplicated across locations.
Product Page Changes
Available on paid plans.What Changed
list_product_changes
What changed across your catalog on a given day or range: titles, bullets, images, categories, variations, and video.
One Listing's Edits
get_product_change_history
The full edit history for one product, plus its current listing snapshot.
Stock Changes
Available on paid plans.Stock Changes
list_stock_changes
When your own stock went out, ran low, came back, or was partly restocked, by product and location, from the daily checks. Ask for a day or range, or pass the newest time from your last run to get only what is new.
A tracked row is one ASIN in one location, so the same product monitored in five cities counts as five rows. The tools report both numbers, because confusing them is the easiest way to misread your own catalog.
Setup
Connect in About a Minute
No terminal, no code, no API keys. Sign in with your regular Buy Box Checker login and approve access.
The connector URL
https://www.buyboxchecker.com/api/mcpPaste this into the URL field when you add a custom connector. Leave the optional OAuth client fields empty.
- 1
Create your Buy Box Checker account
Sign up and add the ASINs and locations you want monitored. The connector reads the same data your dashboard shows, so there has to be something there to read.
- 2
Add a custom MCP connector in your assistant
Find the MCP or connector settings in whichever assistant you use. In Claude that is Settings, then Connectors, then Add custom connector.
- 3
Paste the connector URL
Give it a name and paste https://www.buyboxchecker.com/api/mcp as the server URL. Leave any optional OAuth client fields empty; the connector registers itself.
- 4
Sign in and approve access
Your assistant sends you to Buy Box Checker to sign in. Approve the read-only access on the consent screen, and it can answer questions about your account from then on.
Works With
There is nothing assistant specific about the server. It is a standard remote MCP endpoint, so anything that speaks MCP over HTTP with OAuth can connect.
Claude
VerifiedWeb, desktop, and Claude Code, through custom connectors.
ChatGPT and Codex
Wherever remote MCP servers with OAuth can be added.
Cursor and coding agents
Any editor or agent that speaks remote MCP over HTTP.
Your own agent
Build against the MCP SDK and point it at the same endpoint.
Verified means we ran the whole flow end to end against production, not that we read a compatibility chart. The rest follow the same standard and should work the same way.
Security
It Can Read Your Data. That Is All It Can Do.
You approve access once, on a screen that spells out what is being granted, and you can take it back whenever you like.
Read Only, Always
There is no tool that edits, deletes, pauses, or spends. The worst a bad question can do is return the wrong report.
Your Data, Your Rules
Access runs through the same database permissions as the app. A teammate who can see two brands in the dashboard sees exactly those two brands here.
Revoke in One Click
Account Settings, Connected Apps, Revoke access. The connection dies immediately, along with every token behind it.
No API Keys
You sign in with your normal login and approve once. Nothing to copy into a config file, nothing to rotate later.
The connector never acts on its own.
A tool runs only when you ask a question that needs it. Nothing is sent anywhere on a schedule, nothing is scraped on your behalf, and no request touches your Amazon Seller Central account, because Buy Box Checker never connects to it in the first place.
FAQ
Questions About the Connector
What is MCP?+
MCP, the Model Context Protocol, is an open standard that lets an AI assistant call outside tools. Connecting Buy Box Checker over MCP means your assistant can look up your real Buy Box data when you ask, instead of guessing or asking you to paste a report.
Which AI assistants can I use?+
Any MCP client that supports remote servers with OAuth. There is nothing assistant specific about the server: it is a standard remote MCP endpoint, so Claude, ChatGPT, Cursor, coding agents, and anything you build yourself all connect the same way. We have run the full flow end to end with Claude, so that is the one we can vouch for from experience.
Can it change anything in my account?+
No. Every tool is read only. There is no tool that adds, edits, pauses, or deletes anything, and no tool that spends money or triggers a scrape. The access you grant on the consent screen is a single read permission.
What data can it see?+
Exactly what your own account holds and nothing more: your brands, tracked ASINs and locations, Buy Box status and who held it over time, delivery times, prices, sales rank, review counts, your own stock readings, alerts, and product page changes. Access is enforced by the same database rules as the app, so a teammate connecting their own account sees only the brands they have been granted.
How far back can my assistant look?+
Back to the first check we stored for each product. Ask about any dates since then, by day, week or month, across every location you track or just one. If an answer would run very long, your assistant is told it was shortened and can ask again with a shorter range or a single location.
Do I need a paid plan?+
No. The connector works on the free plan, which monitors up to 20 ASIN checks across Austin and Denver. Product Page Changes and Stock Changes are paid features in the app, so those three tools ask you to upgrade rather than returning data.
Do I need an API key?+
No. You sign in with your normal Buy Box Checker login and approve access once. There is no key to copy, store, or rotate, and nothing to paste into a config file.
How do I disconnect it?+
Go to Account Settings and use Revoke access under Connected Apps. That kills the connection immediately, whichever assistant it came from. Removing the connector inside your assistant also revokes it.
Is my data used to train AI models?+
Not by us. We never send your data anywhere on our own; a tool only runs when you ask a question that needs it. How your assistant handles the conversation is governed by that provider's own policy, so check theirs as well.
New to Buy Box Checker? Start with the free Buy Box checker for a one off look at any ASIN, or read how Buy Box loss alerts catch the losses you are not watching for.
Running Amazon ads too? There is an MCP for that: Ad Badger Amazon Ads MCP, from the same team.
Put Your Buy Box Data in Your Assistant
Start monitoring free, connect the assistant you already use, and ask it what changed while you were asleep. The Badger is already in the burrow, paws on your numbers.
- Works on every plan
- Read only access
- Revoke any time
Claude is a trademark of Anthropic. ChatGPT is a trademark of OpenAI. Hermes Agent is a product of Nous Research. All marks are property of their respective owners; Buy Box Checker is not affiliated with or endorsed by them.