Deposit BTC
Get the iOS beta and deposit from 0.001 BTC. Only your very first deposit pays its own gas.
Bitcoin-backed dollars · on Mezo
Spend Bitcoin.
Never sell it.
Borrow MUSD against your Bitcoin and pay anyone by @handle. Gasless, in one clean app.
Non-custodial · your keys, your Bitcoin
A closer look
Every screen, considered.
Real screens from the app: amount-first flows, handles resolved to an address before you sign, and honest on-chain receipts.
How it works
Deposit. Draw. Spend.
Three steps, one signature each. Borrow against Bitcoin without selling it, then move the dollars you draw the way you already move money.
Draw MUSD
Borrow MUSD against it. You see your ratio, capacity and distance to liquidation before you sign. Maren liquidates at 140%, thirty points above Mezo’s 110%.
Spend it
Pay a handle, send a link, request or split. Idle MUSD can sit in Earn instead of sitting still.
The awkward questions
Risk, stated plainly.
We are handling people’s Bitcoin. Risk gets stated plainly, or it is not stated at all.
Your position is measured by its collateral ratio. Mezo liquidates a trove at 110%. Maren does not let you get near that: we liquidate internally at 140%, seizing the collateral of an unhealthy user at a 5% penalty and repaying their share of the pooled debt.
That 30-point buffer exists so a fast drawdown reaches Maren’s liquidation threshold long before it reaches the protocol’s cliff. Portfolio shows your ratio and your distance to 140% on every read. The keeper that would act on it is not automated yet: the contract functions are deployed, but they are run by hand today. If Bitcoin falls far enough and fast enough, a position can still be liquidated. That is the nature of a collateralised loan and no design removes it.
No. Payments move MUSD wallet to wallet via transferFrom under your own permit, and Maren never takes possession of your Bitcoin. Claimable links are the one place a Maren contract holds value: the MUSD sits in escrow until it is claimed, or reclaimed by you after its expiry.
The pooled vault is the honest exception and we will not soften it: pooled positions share one trove. Maren runs a single large, conservatively managed trove and gives each depositor a proportional claim inside it. Your collateral is segregated in accounting, not in custody. A catastrophic, faster-than-keeper drawdown could socialise losses across depositors.
The mitigations are the 140/110 buffer, the 0.001 BTC deposit floor, and a protocol-owned insurance buffer funded from the 5% liquidation penalty, which stands at zero because nothing has been liquidated. Automated keeper monitoring is not built yet. They are mitigations, not a guarantee. If you hold more than the protocol minimum, Maren steers you to a direct trove, which carries no pooling risk at all, and the interface says so at the point of decision.
It means Maren pays the Bitcoin fee, not that the fee stopped existing. This deployment has a relayer. Whether it is taking work is a question the app answers per action, on the screen, before you sign anything. Trust that line and not this page.
It works like this: you sign; Maren checks what you signed, tries the call, and pays. Whatever submits for you can only ever touch Maren’s own contracts, and can never move your Bitcoin.
One thing is exempt permanently, and it is the first thing you will do: depositing Bitcoin sends Bitcoin, and nobody can submit a transaction carrying value on your behalf. Your first deposit costs gas and always will.
Not yet. Maren is pre-audit. A third-party audit of MarenVault, MarenEarn and MarenRelayHub (the three contracts that hold or move value) is scheduled after the full testnet deployment and before mainnet.
Until that audit is complete and published, treat Maren as unaudited software and do not deposit more than you can afford to lose. Mainnet launches with the vault capped, and the cap is raised only as the position proves out.