It runs in your browser and shows data only to you
Profit Zones is a browser extension. Almost everything it does happens on your own device, inside your own browser session. The product information, charts, and calculations it produces are displayed to you on the page you are looking at. Your data stays with you.
There are two narrow exceptions, both of which we spell out in full in the privacy policy. Premium subscribers have their license key, their device id, and the ASIN of the product page they are viewing sent to our own license server, so we can check the subscription and warm the regional price cache that powers our Buy Box spread widget. Premium subscribers who are asked to agree to updated terms also have that answer recorded against their license. Neither exception involves your Seller Central data, and neither applies to free users.
Profit Zones is a local, read-only overlay that you control. Apart from the premium license and cache-warming calls named above, your data is processed on your device and shown only to you.
What it reads
Profit Zones works with two kinds of data:
- Your own Seller Central data. For Premium subscribers, when you ask it to, the extension reads your own FBA inventory locations and your own listing price, using the Seller Central session you are already logged into. This is information you can already see in your own account. The tool simply surfaces it where it is useful, next to the product you are evaluating. In the Bulk ASIN Analyzer, the same session can check whether you are approved to sell each scanned ASIN and, if you ask for it, export your own FBA inventory quantities to a CSV file saved on your computer. Without Premium, the one Seller Central read is the sell eligibility check behind the lock icon on the product page.
- Public market data from Keepa. Price history and related product data come from Keepa. With the Keepa browser extension installed, the extension reads Keepa's local cache on your device at no token cost. A Keepa API key is optional; if you provide one, it is used only as a fallback when that cache has no data, or for opt-in steps you approve such as the Bulk ASIN Analyzer's "Use API" step. This is the same public market data Keepa already provides. When you open Variation Confidence on a listing with variations, your key fetches the price, offer, and sales history of the sibling variations, and the result is kept on your device for a day so reopening it is free. The extension shows you the Keepa token cost before it fetches anything, alongside your remaining Keepa balance, which it reads from a free Keepa quota endpoint. The Sales DNA feature reads each seller's stock history and the sales rank history already in that Keepa data to estimate how many units sold at each price. It makes no new request, and the estimate is worked out and kept on your device.
- Public offer and seller information on the listing you are viewing. The panel's Offers Table names and rates the sellers on the current listing. When you open it, the extension requests the listing's "All offers" panel and the public seller profile pages of those sellers, using your own browser session on the Amazon page you are already on. These are the same public pages you could open yourself by clicking through the listing. The requests are throttled to a slow pace, they stop the moment Amazon signals a rate limit, and everything is parsed on your device and shown only to you. You can export the table as a CSV file that is generated locally and saved to your computer. Seller names link to the seller's public Keepa page; that link opens only when you click it. Its Buy Box tab shows which sellers held Keepa's Buy Box over the period Keepa reports; those sellers are often no longer on the listing, so opening that tab requests the public profile pages of up to eight of them in the same throttled way. Store names and ratings the extension has already read are remembered on your device for 30 days so the same profile is not fetched twice.
It overlays these together so you can size up a product at a glance.
It is an agent that identifies itself
Amazon's Agent Policy defines an agent as software that takes autonomous or semi-autonomous action on behalf of, or at the instruction of, a person. Because Profit Zones reads your Seller Central data at your instruction, we treat its Seller Central access as agent access under that definition, and we built it to follow the policy's rules: a narrow, user-directed, read-only agent that says what it is.
- It identifies itself. Beginning with version 1.4.0, and on every install no later than October 1, 2026, the requests Profit Zones makes to Seller Central carry your real Chrome user agent with an Agent tag with our name appended. Your browser's real user agent is kept and the tag is appended. Beginning with version 1.5.1, the requests it starts on its own on the Amazon shopping site carry the same tag: the Offers Table's requests for the listing's offers and seller profiles, and the product pages the Bulk ASIN Analyzer loads in its scanner window. Only requests the extension starts are tagged. Your own Seller Central and Amazon tabs, any page you open or click, and Keepa are not modified.
- Nothing is fabricated. Requests come from your own Chrome, using the Seller Central session you are already logged into. No cookies are extracted.
- It is read-only. It reads your inventory and listing price, your FC inventory ledger, and listing eligibility. It does not submit listings, applications, or changes of any kind.
It does one specific thing, the same way every time, and only when you tell it to.
- It does not make autonomous decisions or pursue goals of its own.
- It does not run a perceive, decide, act loop.
- It does not loop or retry to work around limits or controls.
- It does not mimic human typing, clicking, or browsing patterns. Its pacing is fixed and documented (800 ms between ledger pages, with no random jitter) to respect Amazon's rate, not to disguise itself.
- It does not solve robot checks or circumvent any access controls. If Amazon shows a robot check during a bulk scan, the scan pauses and hands it to you instead of pushing through.
Every read of your Seller Central data is triggered by a direct action you take. When the underlying source is unavailable, the tool stops and tells you, rather than trying to push through.
What we tested. On September 26, 2026 we ran about 210 Seller Central requests on sellercentral.amazon.com, including full ledger crawls, with and without the agent tag. We saw no blocks, no rate limits, and no differences in the data returned. That shows the tag has no immediate impact. It is not a guarantee: Amazon keeps the right to limit or restrict agent access at its discretion. If it does, Profit Zones stops rather than work around it, and waits for you. When Amazon asks you to confirm before going on, you press Continue yourself and Profit Zones picks up where it left off. That pause is expected. It is how the tool is designed to behave, and pressing Continue is fine.
It does not scrape competitors, aggregate, or resell
The seller information in the Offers Table, including the past Buy Box holders on its Buy Box tab, is public storefront information tied to the listing you are already looking at, fetched by your own browser and shown only to you. The store names it remembers between listings live only on your device. Profit Zones does not crawl storefronts, does not harvest competitor data beyond the listing in front of you, does not combine data across different accounts or users, and does not sell or share your data. Your Seller Central data is processed locally and shown only to you. It is never transmitted to us, stored on our servers, aggregated, or resold. The one exception is a warehouse code you choose to report, described below.
The two reports you can choose to send us
An Observed Sales reading that looks wrong. The Stock Gap section of the panel shows an Observed Sales reading for the sellers on a listing. If that reading looks wrong, you can click "Send to Profit Zones support". Nothing goes anywhere until you read a short confirmation of exactly what will be sent and click Send; Cancel sends nothing. The report contains the ASIN, the marketplace, the supply readings the extension calculated for that listing, the public Amazon seller ids on that listing (these identify storefronts, not you), and the extension version. It carries no license key, no email, no device id, no Seller Central data, and no page address, so we cannot connect it to you or reply to it. We use it only to check and correct the Stock Gap readings.
An Amazon warehouse the map does not know (from version 1.6.3). When Buy Box by Metro finds your FBA inventory in an Amazon warehouse it does not recognize, it lists that warehouse as unmapped instead of leaving its units out, and offers a "Report code" link. If you click it, Profit Zones sends us the warehouse code, the date and your extension version, so we can add the warehouse to the map. Nothing else is sent: no inventory amounts, no product, no license key, no email and no device id. Nothing is sent unless you click.
You stay in control
- Per-session authorization. Seller Central access is off until you turn it on. You authorize it once per browsing session. Authorizing eligibility checks from the lock icon covers only that check; reading your inventory and listing price takes its own authorization and a Premium license.
- Pause anytime. You can pause Seller Central access whenever you want, and no further reads will happen until you resume.
- It honors blocks. If Amazon signals that access should stop, the extension stops for that session instead of retrying. A security block ends Seller Central access for the session, a signed-out session stops further calls, and rate-limit responses make it back off.
Questions
If you have questions about how Profit Zones handles your data, reach out to White Dog Inc through the support channels listed on our website, or email support at profitzones dot app. For the full account of what data the extension handles, see the Profit Zones privacy policy.