Live on Stellar testnetOpen app
Live on Stellar testnet

Lock Bitcoin. Borrow dollars. Tell no one.

Get dollars without selling your Bitcoin. It stays locked on Bitcoin by a script, not with a company, and never becomes a wrapped token.

Open appSee how it works

Testnet only: test BTC and test USDC, no real funds.

0.50000000 BTC
Borrow

33,333.33 USDC

Liquidation below $80,000BTC can fall 20%

Example at $100,000 per BTC. The app uses the live price.

  • No custodianA Bitcoin Script holds it, not a company.
  • No wrapped tokenYour native BTC stays on Bitcoin. Nothing is bridged.
  • Your way outIf Writz stops, you reclaim your BTC after the timelock.

Your Bitcoin never leaves Bitcoin.

Read the details
  1. Your BTC
    Locked on Bitcoin
    Your USDC
    0

    Step 1: Lock BTC on Bitcoin

    Your BTC goes into a Bitcoin Script address that only your key and Writz's can release together. It never leaves the Bitcoin chain.

  2. Your BTC
    Locked on Bitcoin
    Your USDC
    0

    Proof checked on Stellar

    Step 2: Prove it on Stellar

    A relayer brings proof of the deposit to Stellar, where a contract checks it against Bitcoin block headers. The proof crosses over. The coins do not.

  3. Your BTC
    Locked on Bitcoin
    Your USDC
    Borrowed

    Step 3: Borrow dollars

    Take up to two thirds of your BTC's value in USDC, straight to your Stellar wallet. Borrowing less leaves more room before liquidation.

  4. Your BTC
    Back in your wallet
    Your USDC
    Repaid

    Step 4: Repay and unlock

    Pay back the loan plus interest whenever you like. Writz co-signs the release and your BTC returns to your wallet.

At no point does Writz hold your Bitcoin, and if Writz ever disappeared, you could reclaim it alone once the timelock expires.

Put dollars to work, or put Bitcoin to work.

Keep your Bitcoin. Spend anyway.

Lock your Bitcoin, take dollars against it, and get it back when you repay.

66% of your BTC value, at most

Liquidation
If your collateral falls below 120% of the loan
Your way out
If Writz stops, you reclaim your BTC after the timelock

Borrowing less leaves more room before liquidation.

Start borrowingNo wrapped token

Lend dollars. Earn on them.

Deposit USDC and earn yield that accrues on its own. Withdraw part or all of it whenever you want.

APY from borrower interest

Variable, shown live in the app.

Start earningNo lock-up

The protocol runs on contracts you can read.

Read the source

bitcoin-spv

Verifies Bitcoin transactions on Stellar

CBX23YKCCJMAMBMSCNP6YVKEXUIYK2CTKSR4TQ3RVBPAFYZFVCW7W4EO

writz-lend

Runs the loans

CABF7VK7F25ZGDLV6EWSAU3NYQYKDQNDSJIISDMDZAUASMSXUADSHZGG

Earn vault

Holds Earn deposits

CBMHGL7GGGHODEDDJ5H2LKJEFHJWBRSQUKOXMC4FKOFDZK5HBKW6PI2S

Open source under Apache 2.0.

Not audited yet. Read the security model

Live on Stellar testnet. Not on mainnet yet.

Your Bitcoin is already yours. Start using it that way.

Test funds only. Writz never asks for your keys.

Open appRead the docs