OnlyFoils is a French online retailer specializing in trading card games and accessories. Operated by Clay SAS, the brand serves players and collectors looking for products across Magic: The Gathering, Pokémon, Disney Lorcana, and Riftbound, the League of Legends trading card game. Its catalogue includes booster packs, displays, starter and champion decks, bundles, gift editions, collection boxes, and other releases, including themed Magic crossovers and expansions.

OnlyFoils also offers a broad selection of card-protection and storage accessories. Shoppers can browse standard, premium, and illustrated sleeves; deck boxes; binders and portfolio pages; playmats and playmat cases; storage boxes; dice; and related items. The website features popular products, new releases, and articles introducing sets, game worlds, and upcoming products, helping customers explore the hobby as well as shop. Customers can create an account, manage wish lists, and track orders, while the site provides customer-service and after-sales information. OnlyFoils also offers a newsletter for updates and special offers.