LINE NEXT unveils Unifi Pay for zero-fee stablecoin payments

According to a CoinPost , LINE NEXT, the U.S.-based affiliate of LINE Yahoo, announced on June 30 that Unifi Pay will be launched globally after a beta phase that handled 100 billion Korean won in cumulative payments and settlements over the past year. 

The company, which has access to LINE Yahoo’s 300 million users, is building the service on its Unifi stablecoin wallet and has started accepting registrations from global developers before the official rollout.

Unifi Pay will support Tether’s USDT, the Japanese yen-denominated JPYC and the Indonesian rupiah-denominated IDRP at launch. In Japan and Indonesia, users will be able to complete online identity verification and directly top up JPYC or IDRP from their bank accounts. LINE NEXT also said it plans to add local stablecoins in more countries, depending on what each market’s regulations allow.

Unifi Pay offers wallet-based settlement with zero payment fees

Using a wallet-based structure, Unifi Pay directly connects users and suppliers and removes payment fees from the transaction process, according to the announcement. LINE NEXT said the service offers an average settlement speed of about one second.

The company will also provide a function that allows settlement funds to be sent directly to bank accounts through connected crypto exchanges and blockchain remittance solutions. This gives suppliers and developers a path to move stablecoin payments into bank accounts after receiving funds through the wallet.

For developers, AI builders, and creators, LINE NEXT is introducing the Unifi Pay SDK to simplify the process of adding global payments. The company said the SDK uses an A2A, or Agent-to-Agent, task execution method for AI agents, allowing a payment page to be created in about 10 minutes through a single command input.

Developer companies that keep payment proceeds in the wallet may receive annual rewards of up to 5%, depending on the type of stablecoin used. LINE NEXT said the reward model is tied to stablecoin holdings inside the wallet.

The beta version of Unifi Pay recorded 100 billion Korean won in cumulative payment and settlement volume over the past year, equal to about 10 billion Japanese yen based on the announcement’s conversion rate of 1 won to 0.1 yen. LINE NEXT CEO Youngsu Ko said the company plans to establish Unifi Pay as a payment infrastructure that connects developers, creators, and users around the world through its developer tools.

The planned launch also follows LINE NEXT and Kaia’s earlier stablecoin work through Project Unify, which was announced during Korea Blockchain Week in September 2025. Kaia described Project Unify as a stablecoin super-app designed to bring payments, yield, on/off-ramps and access to more than 100 decentralized apps into LINE Messenger, which the company said had nearly 200 million monthly active users across Japan, Taiwan, Thailand and Indonesia.

Kaia said at the time that Project Unify would support USD, JPY, KRW, THB, IDR, PHP, MYR and SGD at launch, while offering developers and issuers a Unify SDK with a focus on regulatory compliance, especially in South Korea. The project followed the 2024 merger of LINE’s Finschia and Kakao’s Klaytn into Kaia, which has described itself as Asia’s stablecoin orchestration layer.