Zest Protocol caps its bitcoin backed USDC loans demo at 0.001 BTC

Bitcoin holders who want to unlock liquidity without giving up custody of their coins now have a new option to test. Zest Protocol has rolled out a mainnet demo of a system built for bitcoin backed $USDC loans, letting native $BTC on the Bitcoin network back borrowing activity on Ethereum without ever leaving its home chain. It’s a narrow, capped experiment for now, but the mechanics behind it point to a bigger shift in how Bitcoin-backed lending could eventually work across chains.

Key takeaways

• Zest Protocol launched a mainnet demo for Bitcoin Collateral Vaults, allowing native $BTC to back $USDC loans on Ethereum.
• $BTC stays in self-custodial Taproot vaults on Bitcoin and is never wrapped or bridged to Ethereum.
• Users deposit $BTC into individual vaults while Ethereum smart contracts handle the $USDC borrowing side.
• The demo currently caps collateral at 0.001 $BTC per wallet to limit exposure during testing.
• Collateral destinations, including liquidation and repayment paths, are pre-authorized by depositors when a vault is created.

Zest Protocol Launches Bitcoin Collateral Vaults Mainnet Demo

Zest Protocol has put a working version of its Bitcoin Collateral Vaults live on mainnet, giving users a real, though restricted, preview of how the system is meant to function before a full production release. This is not a testnet simulation — the demo runs on actual Bitcoin and actual $USDC, which makes it one of the more concrete attempts yet to bring native $BTC into Ethereum-based lending without relying on wrapped tokens.