USure privacy policy
Effective 11 November 2026
USure is operated by Jay Vermeer. For privacy questions or requests, email usure@jayvermeer.com.
What the extension processes
USure reads supported eBay UK item pages to place the scan card and identify the listing. On Facebook, it only checks the page address to show the card on Marketplace listings. When you open a supported listing, the extension contacts our API on Render to start it, at most every four minutes; that request contains no listing details. When you scan a listing, the extension sends its eBay item ID, and any listing option you chose, to our API. These identifiers reveal which eBay listing you scanned.
The API retrieves public listing information through eBay Browse. It can send product, model or style-code search terms, marketplace, category and condition to CompsAPI to find sold comparisons. Costs, profit targets and resale values you enter are calculated in your browser and are not sent to us.
Sold results returned by CompsAPI are public sale records: listing ID, title, price, date and condition. We store them in our database and reuse them for later scans. They contain no information about you.
USure accounts
When accounts are enabled, you can sign in with an email code or with Google. Supabase handles sign-in. We store your account ID, your email address, and the IDs of listings counted towards a free trial. When subscriptions are enabled, Stripe handles payment details; we store only your Stripe customer ID and check your subscription status. The extension keeps your sign-in session on your device.
Sign in with eBay
You can choose to connect your eBay account to USure. It is optional: scans work without it. eBay asks you to approve read-only access to your eBay identity (your eBay user ID and username) and to your order history. USure never sees your eBay password and cannot list, buy, change or cancel anything on your account.
When you connect, USure imports the items you sold in the last two years and keeps only what pricing needs: the listing ID, title, price paid per item (including accepted offers), quantity and sale date. We never store buyers' names, addresses or contact details, or eBay order numbers. The eBay access token is stored encrypted. Your sold prices may be used, without your name or eBay username, as comparable sales in USure's estimates.
You can disconnect eBay at any time from your USure account page. That deletes the connection, its token and your imported sales. If you ask eBay to delete your eBay account, eBay notifies us and we delete the same data automatically. You can also withdraw USure's access from your eBay account settings.
Facebook Marketplace
When you open a Facebook Marketplace listing, USure shows a small card on the page. It reads nothing and sends nothing until you press Scan listing. USure is not affiliated with Facebook or Meta.
When you press Scan listing, the extension reads the listing you have open: its title, price, condition, description, delivery option and up to three photos. It sends these to our API, which passes them to an AI model provider (Anthropic) to work out what the item is. USure does not read the seller's name, profile or messages, and does not read any other page. You must be signed in to scan.
We do not save the listing's text or photos. They are used to answer that scan, and we keep only the identified item (for example "PS5 disc edition") and a one-way hash of the listing in memory for up to an hour so a repeat scan of the same listing gives the same answer. The identified item is used to look up eBay sold prices, and is not added to our sold-sales records. Our logs hold counts and labels only. The AI provider handles the text and photos under its own terms.
Why we use this information
We use listing data and sales to provide scans, calculate estimates and show comparable evidence. We use account and eBay data to provide access, count trials and improve estimates. We use operational diagnostics to detect problems such as timeouts, rejected matches and rate limits. Our legitimate interests are to deliver the features you request and keep the service reliable and secure; for eBay sign-in we rely on your consent, which you can withdraw by disconnecting. We do not sell your data or use it for advertising.
Hosting, sharing and retention
Render hosts the API and may process connection information such as IP addresses for service delivery and security. Supabase (hosted in the EU) stores accounts, eBay connections, imported sales and sold records. eBay, CompsAPI, Stripe and the AI model provider handle the requests described above. These providers may process data outside the UK under their applicable terms and safeguards. All requests use HTTPS.
We keep sold records from CompsAPI indefinitely to price future scans. We keep your eBay connection and imported sales until you disconnect or your eBay account is deleted, and your account until you ask us to delete it. Application diagnostics contain outcome codes and counts and do not include listing IDs, titles or costs you enter. Hosting log retention depends on the provider. Render log retention.
Your choices and rights
You can disable or remove USure from Chrome to stop scans, and disconnect eBay at any time. Depending on your circumstances, you can ask to access, correct or erase your personal data, restrict or object to processing, or raise a complaint. Contact us using the email above. In the UK you can also complain to the Information Commissioner’s Office.