Kapers is a Japanese online service for searching auction prices and comparing listings across popular resale and marketplace platforms. Its tools let users search products, browse sellers, and narrow results by category or listing status, including completed sales and items currently available. The platforms shown include Yahoo! Auctions, Mobaoku, Mercari, Rakuma, minne, and Creema, giving shoppers and sellers access to a broad range of marketplace listings in one place.

Kapers covers an extensive selection of goods, from books, music, clothing, accessories, home furnishings, electronics, toys, and collectibles to food, sports equipment, tickets, pet supplies, and handmade products. Its category options also reflect the different product sections offered by the marketplaces it searches, including jewelry, bags, smartphone accessories, kitchenware, crafts, and children’s items. By presenting auction price information alongside product and seller search, Kapers serves people researching market prices, comparing available items, or exploring what is being sold online. The site identifies itself as a free auction sale-price search service and provides links to its terms of use and privacy policy.