Introducing Oneliq

Oneliq is the stablecoin command center for Arc: one interface for USDC swap, cross-chain balance, and automated USDC send, built on Circle's Stablecoin Kit.

USDC should behave like a single digital dollar regardless of which chain holds it. In practice it does not. You hold separate USDC positions on Ethereum Sepolia, Base, Arbitrum, Optimism, and Arc, cross bridges to move value between them, and track fees in different tokens depending on the network. Oneliq exists to collapse that complexity into one product surface. One interface handles the swap, the cross-chain transfer, and the automated rule. The underlying chain is an implementation detail, not a variable you should have to manage.

Oneliq runs on Circle's Stablecoin Kit end to end. Circle App Kit routes USDC and EURC swaps natively on Arc. CCTP V2 moves USDC across chains in seconds via burn-and-mint. Circle Gateway pools USDC from up to eight testnets into one balance you can spend from anywhere. Circle Programmable Wallets execute agent rules against user-signed EIP-2612 permits, with gas sponsored by Circle Paymaster. Arc is the settlement layer throughout: USDC is Arc's native gas token, so every action denominated in USDC settles without a secondary fee token.

What is live today

Trade swaps USDC and EURC natively on Arc via App Kit, bridges USDC across eight testnets via CCTP V2, and spends directly from Gateway deposits. All three settlement routes share the same form. Balance gives USDC deposited from any supported testnet a unified pool through Circle Gateway, with three spend modes: auto-routing, single source, or manual per-chain allocation. Agent is in preview: sign an EIP-712 rule and the agent runs Auto Top-Up or Scheduled Send against your wallet using a bounded Programmable Wallet executor with gas fully sponsored. History surfaces every trade, balance move, and agent execution as a receipt feed in real time across all supported chains.

All Circle, all the way down

App Kit, CCTP V2, Gateway, and Programmable Wallets are Circle products. No third-party bridges, no wrapped derivatives, no proprietary liquidity pools. Every settlement path in Oneliq runs on the same stablecoin infrastructure Circle uses itself.

Where this is going

The long-term bet is that as Arc reaches mainnet, the most useful place to be is the interface where stablecoin capital moves most efficiently. Oneliq wants to be that default surface: the product you open when you need to send, swap, earn yield on, or automate USDC on Arc, without configuring a different app for each action. Each release narrows the gap between intent and execution. You express what you want to happen to your USDC and the infrastructure handles the rest.

Where to find us

The app, status dashboard, and community channels are all public.

discord.com/invite/7XUPdWWrGk

Oneliq is live on Arc Testnet (chain ID 5042002). Mainnet timing follows Circle's own Arc rollout.

One USDC. One balance. Everywhere.

Trade, Balance, Agent, and History are live on Arc Testnet. Connect any EVM wallet and start.

Trade Balance Agent

Testnet only. No real money.

Everything on Oneliq today runs on Arc Testnet and connected test networks. All USDC is testnet USDC with no monetary value. Never send mainnet USDC to a testnet address. Funds sent to a testnet address are unrecoverable.

Oneliq is a non-custodial frontend on Arc Testnet. Nothing here is real money or financial advice. We do not custody funds; you always retain control of your wallet.