Ask Your AI Assistant Where You Are Losing the Buy Box
Connect Buy Box Checker to Claude, ChatGPT, Cursor, or whatever you already use, and ask about your own Amazon data in plain English. One standard MCP endpoint. Read only, secured with OAuth, and it works on every plan including free.
Free plan available. No credit card required to start.
Why It Matters
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
Ask It Anything
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.
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?”
- “Which brand has my worst Buy Box win rate, and why?”
- “How many of my ASINs are suppressed, and which ones?”
- “Show me my weakest ASINs by 30 day win rate.”
- “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 is taking my Buy Box on my worst ASIN, and at what price?”
- “What is the estimated revenue I am losing on this ASIN?”
- “How fast is delivery on this product compared to the seller beating me?”
- “Is this ASIN out of stock anywhere?”
Track What Moved
Trends, not snapshots. Every answer here comes from stored history rather than a fresh scrape.
- “Which products had their Best Sellers Rank improve this month?”
- “Which products got worse, and by how much?”
- “How has my Buy Box win rate trended over the last 30 days?”
- “Show me the price history on my top ASIN.”
- “Did anything change after my competitor dropped their price?”
Watch Listings and Alerts
Hijackers, suppression, sales rank drops, and quiet edits to your own product pages.
- “What product pages changed on August 4th?”
- “Has anyone hijacked my listings this week?”
- “Show me every sales rank drop alert from the last 7 days.”
- “Did anyone change my product images or bullet points?”
- “Summarize everything that went wrong yesterday.”
What It Can Reach
Ten 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
- get_account_overview
- Tracked ASINs, owned, lost and suppressed counts, 30 day win rate, unread alerts, and plan usage.
- 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.
- 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
- list_asins
- The filterable table as a tool. Filter by status, win rate, Prime eligibility, or free text, and sort by any column.
- get_asin
- One product across every tracked location: who holds the Buy Box, at what price, delivery speed, stock, sales rank, badges, and competing offers.
- get_asin_history
- Daily series for win rate, price, delivery days, rating, sales rank, and competitor pricing over 7 to 90 days.
Movement and Alerts
- get_bsr_movers
- Which products improved or declined in Best Sellers Rank over a window, ranked by the size of the move.
- list_alerts
- Buy Box losses, hijackers, suppression, sales rank drops, badge changes, and stock events, deduplicated across locations.
Product Page Changes
Available on paid plans.- list_product_changes
- What changed across your catalog on a given day or range: titles, bullets, images, categories, variations, and video.
- get_product_change_history
- The full edit history for one product, plus its current listing snapshot.
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
Four steps, no API keys, no configuration files.
- 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.
https://www.buyboxchecker.com/api/mcp
Paste this into the URL field when you add a custom connector. Leave the optional OAuth client fields empty.
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.
Access and Control
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 dashboard shows you and nothing more: your brands, tracked ASINs and locations, Buy Box status and history, delivery times, sales rank, 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.
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 are a paid feature in the app, so those two 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.
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.
- Works on every plan
- Read only access
- Revoke any time