Aggario
Aggario finds it, values it, negotiates it, and helps you get it. An AI buying agent for secondhand and marketplace shopping — starting with eBay, OfferUp and Facebook Marketplace, and built to expand.
"64GB DDR5 kit under $180 within 25 miles, no water-cooled builds." Aggario turns that into an Aggario Watch with a hard maximum you set.
Watches run continuously against connected sources. When something lands, you see it in the feed and in alert history — Aggario found it.
Fair-value range, deal score and match score are computed in code — never by the model — so your hard maximum is enforced deterministically.
Aggario drafts the opening message and anchors the price under your ceiling. You review and send it yourself inside the marketplace.
Aggario is independent and not affiliated with, endorsed by or sponsored by any marketplace. Integration availability depends on each marketplace's APIs and permissions.
Live search runs through eBay's official developer Browse API once developer credentials are configured for this deployment.
You bring the listing by link, share sheet or pasted text. Live search would require written authorization from OfferUp.
Same compliant path: shared or pasted listings only. Automated collection needs express written permission from Meta.
Keyword search runs through Etsy's official Open API v3 active-listings endpoint once app credentials are configured for this deployment. "Etsy" is a trademark of Etsy, Inc. This application uses the Etsy API but is not endorsed or certified by Etsy, Inc.
StockX's official Public API provides catalog search and product market data (lowest ask, highest bid) to sharpen fair-value ranges. It is market data, not an individual seller's listing, and activates once developer access and credentials are configured. Aggario is not affiliated with StockX.
Official APIs exist but need application registration, business approval, or terms verification before Aggario could use them for buyer search. Until then you can still paste or share links from these sites.
No official public buyer-search API is documented for these, and Craigslist's official programmatic interface is bulk posting rather than buyer search. Paste or share a link and Aggario normalizes, values and scores it like anything else.