Principal stays. Interest moves.
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HOW IT WORKS
PRINCIPAL
INTEREST
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OASIS / Protocol
01 / VAULT
Deposit once, then live off the yield.
02 / THE RULE
Your principal is never spendable.
03 / CARDS
Turn accrued interest into a prepaid card.

Deposit

Send USDC in. It becomes your locked principal, supplied to one lending market on Solana.

Vault / 01 ↗

Accrue

Two numbers, nothing else: locked principal and spendable yield. The spendable number grows as interest accrues.

Overview / 02 ↗

Spend

Spending draws from accrued yield only. A charge larger than your interest is declined whole — never topped up from principal.

Spend / 03 ↗

Withdraw

Pull principal back to your wallet whenever you want. It is always a deliberate action — a spend can never trigger it.

Withdraw / 04 ↗
Open the vaultOpen the dashboard ↗
Your principal is locked.
Never spendable.
Always yours.

Deposits become locked principal, supplied to a single lending market. The vault contract itself makes principal unspendable — not a setting, not a promise. Only an explicit withdrawal moves it.

Spend the interest.
Declined, never partial.

Spendable equals yield accrued minus yield already spent. If a chain read fails, spendable is treated as zero and the spend is rejected. A timeout never unlocks principal.

Yield on Solana
USDC in. Plain lending interest out.
Deposits are supplied to one on-chain lending market on Solana. Yield is plain lending interest — no staking, no leverage, no strategy rotation. Settles in about 400ms.
Let your savings pay your bills
Your deposit works. Your interest spends.
Turn accrued interest into a prepaid card that works online worldwide. About $33.60 of interest buys a $30 prepaid Visa, fees included.
Principal stays. Interest moves.
Keep scrolling. The vault is open. ↓
OPEN APP. ↗

Deposit stays locked and working. Interest becomes the only thing you spend.

Withdrawals can never be paused —
not by us, not by anyone.