KP-Link is a mobile-pin peer-to-peer marketplace designed to make digital goods trading direct, convenient, and secure. The platform connects buyers and sellers without intermediary transaction fees, enabling users to register items for sale and receive payment automatically when a trade is completed. Sellers earn mileage worth 0.1% of each completed sale, credited immediately and available for use or exchange for gift cards from brands including Shinsegae, Lotte, Starbucks, Cultureland, and Google Play. The rewards can also be used at offline stores.

KP-Link says it protects transactions through identity and bank-account verification, AES-256 encryption, IP tracking, and transparent, hash-based transaction records. Its e-Safe electronic guarantee system is intended to protect PIN information, while automated matching and settlement support real-time trading. The platform also describes processes for restoring failed transactions and providing evidence in cases of reports or disputes. KP-Link presents its service as a user-led marketplace built around fee-free trading, immediate seller rewards, and security technology.