Chrome extension for cross-listing

Our free browser extension adds two things to your desktop: scanning from any webpage, and one-click cross-listing to marketplaces we cannot publish to directly.

Install it

1. On a desktop computer, open Chrome or Edge.
2. Get the extension from the Chrome Web Store.
3. Sign in to your Underpriced AI account so the extension can reach your items.

A Firefox extension is also available for scanning items from online listings.

Scan from anywhere

Right-click any item photo on any website, an auction listing, an estate sale page, a marketplace, and choose "Scan with Underpriced AI." You get the same analysis as a photo scan: identification, a price range, recent sales and market saturation. Each scan counts as one scan toward your limit.

Cross-list in one click

1. Open a saved item in Underpriced AI.
2. Click "Open Facebook" or "Copy & Open" for the marketplace you want.
3. The extension opens that marketplace's own create-listing form and fills in the title, price, description and photos, plus condition on Facebook.
4. Review everything, pick the category, and click Post.

Nothing is ever posted for you. You always have the last look before a listing goes live.

Supported marketplaces: Facebook Marketplace, Poshmark, Mercari, Depop, Whatnot, Vinted, OfferUp, Etsy, District, Craigslist, 1stDibs and Ruby Lane. eBay and Bonanza do not need the extension, since you can publish to those directly from the app.

Where it works

The extension runs on desktop Chrome and Edge only. Phone browsers cannot run extensions, so on a phone open the item and tap Copy it step by step (Poshmark, Mercari, Facebook Marketplace, Depop, Vinted and OfferUp), or use the Copy buttons for other marketplaces. You post it yourself in their app.

Privacy

The extension works entirely inside your browser using the marketplace sessions you are already signed in to. We never see or store your marketplace logins.