Privacy Policy — eBay Analyzer by MZK

Last updated: 11/07/2026

eBay Analyzer by MZK ("the extension") is a Chrome extension that compares an eBay transaction statement against a team payout spreadsheet and reports where they disagree. This page explains what user data the extension handles, where it goes, and why.

What stays on your device and is never sent anywhere

Your eBay transaction statement (CSV) and Amazon order history (CSV) are read and processed entirely inside your browser tab. They are never uploaded to us or to any third party.
Your settings — the connected spreadsheet ID, your write-back script URL, your API key override (if any), your preferred sheet-naming format, and your sign-in session — are stored locally on your device using the browser's local extension storage. They are not synced to any account or server of ours.

What the extension does send over the network, and to whom

The extension's only network activity is described below. We do not operate our own data-collection servers beyond the small scripts described here, which exist solely to make the extension work.

Data	Sent to	Why
Your email address and a session token	Our subscription-verification script (Google Apps Script)	To confirm you have an active subscription before allowing a write action (Update, Add to team sheet, Generate month sheet, or the eBay order-page button).
Order number, buyer name, sale amount, dates, and — only if you choose to add it to your own note — a Cost of Goods figure	Google Sheets API, and our write-back script (Google Apps Script)	To read your connected spreadsheet and write back only the specific row or cell you approve by clicking a button. Nothing is written without you clicking an explicit action.
The order number, buyer name, sale amount, and your note's text, read directly from an eBay order page	(read locally, then sent as above, only if you click "Add to sheet")	To let you add an order to your spreadsheet directly from eBay's own order page, without switching tabs.

Payment information

Subscription payment is handled entirely by Stripe, a third-party payment processor, in a page Stripe itself controls. The extension never sees, receives, or stores your card number or other payment details — that happens entirely on Stripe's side. See Stripe's own privacy policy for how they handle that.

What we do not do

We do not sell user data.
We do not use or transfer user data for advertising of any kind.
We do not use or transfer user data to determine creditworthiness or for lending purposes.
We do not track which other websites you visit. The extension only reads a page's content when you are on a supported eBay order page and you click a button on it.

Data retention and deletion

Your email address and session token are kept only for as long as needed to verify your subscription. Google Sheets data lives in the spreadsheet you connected and control directly — we do not keep a separate copy of it. To request deletion of your subscription record, contact us using the details below.

Children's privacy

This extension is not directed at children under 13, and we do not knowingly collect data from children.

Changes to this policy

If this policy changes, the updated version will be posted at this same URL with a new "Last updated" date.

Contact

Questions about this policy or a data deletion request: [CONTACT_FORM_OR_EMAIL]