Cross-chain USDC, settled in one block.
OneBlock is a peer-to-peer desk for native Arc USDC. Buy directly from sellers, pay on Ethereum, and the keeper settles both sides on-chain — with a guaranteed refund if it ever stalls.
One block instead of a ~15-day bridge wait, for a 8.0% premiumbest live offer +5.00% + 3% desk fee
Seller posts liquidity
A seller locks Arc USDC in escrow and names a premium.
Buyer pays on Ethereum
The buyer's payment is locked in an escrow contract — never a wallet.
Keeper settles in one block
The asset lands on Arc and the seller's payment is released atomically.
Open offers
0 live · lowest premium firstFunds stay in escrow
Your payment sits in an on-chain escrow contract — never a company wallet.
Timeout-protected
If the asset isn't delivered before the deadline, you reclaim your full payment on-chain — no permission required.
Both sides or neither
The keeper only releases the seller's payment after delivering the asset to you on Arc.