Sonic Labs has rolled out USSD, a native dollar stablecoin issued directly on the Sonic network rather than bridged in from another chain. The project is designed to give protocols across Sonic a shared USD liquidity asset, addressing fragmented liquidity inside DeFi. Sonic said USSD is already live across more than 10 blockchain networks, including Ethereum, Base, and Arbitrum, with intended use in decentralized trading, lending, and payments.
Reserve structure built around tokenized Treasury products
USSD is built on infrastructure from Frax Finance’s frxUSD. Its reserves consist of short-term tokenized U.S. Treasury products, specifically BlackRock’s BUIDL, Superstate’s USTB, and WisdomTree’s WTGXX. According to the source material, these assets are held by regulated custodians to support redemption confidence and align with existing regulatory frameworks.
Sonic Labs framed the stablecoin as a response to liquidity fragmentation across decentralized finance. Instead of relying on externally bridged stablecoins to seed activity on a newer chain, the team is positioning USSD as the network’s native dollar layer.
Permissionless minting with 1:1 deposits and zero mint fees
Users can mint USSD through non-custodial smart contracts on a permissionless basis, and the minting process carries no fee. Supported collateral includes USDC, USDT, PYUSD, USDB, as well as tokenized Treasury products such as BUIDL, USTB, and WTGXX. Deposits are made at a 1:1 ratio to create USSD.
Cross-chain functionality is a central part of the design. A user can deposit assets on another chain, such as sending USDC from Ethereum, while receiving USSD on Sonic at the same time. That structure is intended to reduce friction in moving stable-value assets across multiple DeFi venues.
Redemptions available at parity across supported networks
The redemption model mirrors the minting process. Holders can redeem USSD back into any supported USD asset at parity and choose the network where redemption takes place. Chain compatibility is handled through Circle’s CCTP, or Cross Chain Transfer Protocol, which links the supported networks for asset transfers.
In its official statement, Sonic Labs described USSD as the “US Sonic Dollar,” calling it a network-native USD stablecoin meant to serve as the stable liquidity layer across the Sonic ecosystem and a core part of its vertical integration effort. The team also pointed to cooperation with BlackRock, Superstate, and WisdomTree on reserve assets and highlighted zero minting fees.
Treasury yield is directed back into the Sonic ecosystem
Yield generated by the Treasury-backed reserves is routed back to the Sonic network instead of being paid out to outside parties. Sonic said that income will support buyback initiatives and ecosystem rewards, with the aim of distributing value to participants and builders while preserving the integrity of USSD’s backing.
The roadmap also includes a regulated path for eligible users to convert USSD into fiat currency. That process would depend on KYC verification and issuer approval. Based on the disclosed details, USSD is being positioned as a stablecoin that combines on-chain liquidity coordination, institutional-grade reserve assets, and regulatory compatibility.