Shop with the
quiet confidence
of a mavin.
Discover listings across the resale web, let Claude inspect each one for authenticity, draft a poised negotiation message in your voice, and track every price tag until it moves.
Listings, audited.
Claude reads every description and flags red flags before you click buy.
Negotiate softly.
A ready-to-send offer in your voice — polite, persuasive, and priced just right.
Track every tag.
Add anything to your watchlist. We refresh prices in the background, every half hour.
Checkout, clean.
Secure payment via Stripe. Orders saved beautifully. No surprise fees.
Track any listing
in one drag.
Drop the Mavin button on your bookmarks bar. Then while shopping Poshmark, eBay, or Mercari — one tap and we’re tracking the listing. No copying URLs. No app switching.
Drop the Mavin pink button onto your browser's bookmarks bar.
Browse Poshmark, eBay, Mercari like normal. Find something you'd track later.
One click of the bookmarklet and Mavin starts watching the price for you.
click the pink button
Stop overpaying. Start curating.
Sign up, drop the Mavin button on your bookmarks bar, and the savvy version of you starts shopping today.