Live demo

A credit card the issuer cannot touch.

Lock bitcoin, borrow dollars, spend without selling, repay, and take your bitcoin back. Every step is real logic. Bitcoin and card settlement are simulated for this walkthrough and labeled where they are.

Lock

Open line

Spend

Repay

Release

Position non-custodial

Collateral locked0 BTCnothing locked yet

Credit limit$060% of collateral

Available to spend$0grows back as you repay

Balance owed$0nothing borrowed

Loan to value0.0%

0%limit 60%liquidation 85%

Do the next thing

What just happened

Nothing yet. Lock some bitcoin to begin.

Built this weekend at the Arc hackathon. The LTV math, the approve and decline logic, and the state machine are real. Bitcoin locking and Lightning settlement are simulated for this walkthrough. Production uses a real 2 of 3 multisig on signet, then mainnet, and a licensed card rail. Bitcoin is the first collateral. Every liquid asset follows.