Arb Radar — Privacy Policy

Effective date: July 3, 2026

The short version: everything stays on your device. Arb Radar has no server, no accounts, and no analytics. We never see your data — we couldn't even if we wanted to.

What Arb Radar collects

• Listings you browse. When you visit supported marketplace sites (Facebook Marketplace, Craigslist, OfferUp, Mercari), the extension reads the listing information already displayed on the page — title, price, location, listing URL, and image URL — and stores it locally in your browser so it can show you a deal feed.
• Settings you enter. Your fee-model preference and (optionally) your own Anthropic API key are stored locally in your browser's extension storage.

What Arb Radar does not do

• It does not send your browsing data, captured listings, or any personal information to us or to any third-party server. There is no Arb Radar server.
• It does not collect analytics, telemetry, or usage statistics.
• It does not read pages other than the supported marketplace sites listed above.
• It does not sell or share any data with anyone, for any purpose.

Network requests the extension makes

• eBay (ebay.com): to estimate an item's value, the extension loads eBay's public sold-listings search results for that item, the same way you would by searching eBay yourself. Only the item's search terms are sent to eBay.
• Anthropic (api.anthropic.com): only if you use the optional Photo Scan feature and have entered your own Anthropic API key in Settings. The photo you choose is sent directly from your browser to Anthropic's API to identify the item. Your key and photos are never sent anywhere else. Anthropic's handling of API data is governed by Anthropic's privacy policy.
• Marketplace listing pages you explicitly paste into the link-import box are fetched to extract that one listing's details.

Affiliate links

Some eBay links in Arb Radar may be affiliate links through the eBay Partner Network. If you click one and make a purchase, we may earn a commission at no cost to you. Affiliate tagging adds no tracking beyond eBay's own standard link parameters and tells us nothing about you.

Data retention and deletion

All captured data lives in your browser's local extension storage. Removing the extension deletes everything. No copies exist anywhere else.

Changes

If this policy changes, the updated version will be posted at this URL with a new effective date. Because the extension sends us nothing, changes can only ever describe local behavior.

Contact

Arb Radar is an independent project. Questions about this policy: arigulugian@gmail.com

Arb Radar is not affiliated with or endorsed by Facebook/Meta, Craigslist, OfferUp, Mercari, eBay, or Anthropic. All trademarks belong to their owners.