Private ETH guide
How to send private ETH
Open curvy.box, sign in, paste the recipient's Curvy address, pick ETH, enter an amount, and confirm. The ETH lands at a one-time address that only the recipient can spend from. Their main wallet stays off the public record.
How to send ETH privately
You have two ways to use Curvy. Pick whichever is easier for you: send from your Curvy balance, or connect the wallet that already holds your ETH.
Open curvy.box.
Sign in with your Curvy balance, or connect Rabby, MetaMask, or WalletConnect.
Click Send.
Paste the recipient's Curvy address. ENS names that resolve to a Curvy address also work.
Pick ETH and the chain.
Enter the amount and click Send privately.
Confirm in your wallet, or one-click confirm from your Curvy balance.
The ETH lands at a brand-new address only the recipient controls. The recipient does not need to be online when you send.
Use Curvy directly or connect a wallet?
Both work for ETH. If you care about your own anonymity, use the Curvy balance. If you just want a quick private send from funds you already hold, connect your wallet.
| Use Curvy balance | Connect external wallet | |
|---|---|---|
| Setup | Fund Curvy once, send from balance | Connect existing wallet, send from its balance |
| Sender unlinkability | Stronger - sender side is not tied to your external wallet | Weaker - your wallet's history is still public |
| Best for | Recurring private sends, separating identity from payments | One-off sends from a wallet you already use |
| Supported wallets | n/a (Curvy is the wallet) | Rabby, MetaMask, WalletConnect |
Which chains support private ETH transfers?
Curvy is native to the chains the world uses. The send flow is the same on every chain, and a single Curvy address receives payments on any supported chain.
| Chain | Best for |
|---|---|
| Ethereum | Large transfers |
| Base | Low-cost everyday sends |
| Arbitrum | Low-cost settlement |
| Polygon | High-volume sends |
| Optimism | Settlement |
| BSC | Regional liquidity |
| Linea | Newer deployments |
| Gnosis | DAO treasuries |
You pick the chain in the send flow. The recipient sees payments from all supported chains in one inbox.
How much does a private ETH transfer cost?
You pay normal network gas plus a small announcement fee. No protocol fee on top. Most users send on Base or Arbitrum for cost. Mainnet is preferred for very large transfers where gas is a rounding error.
| Chain | Typical cost per private ETH send |
|---|---|
| Ethereum mainnet | $2 to $6, depending on gas |
| Base | Under $0.10 |
| Arbitrum | Under $0.10 |
| Optimism | Under $0.10 |
| Polygon | Under $0.02 |
| Gnosis | Under $0.02 |
How does the recipient access private ETH?
When you send, Curvy posts a small on-chain announcement so the recipient can find the payment. The recipient does not have to be watching the chain.
Open curvy.box and sign in.
See the payment in the inbox.
Hold the ETH, sweep it to a wallet, or send it onward.
Each option is one click. The docs on receiving assets privately cover automated scanning if they would rather not check manually.
Is sending ETH privately legal?
A private ETH transfer through Curvy is a direct transfer between two parties. Your ETH does not enter a pool, and the recipient does not withdraw from a shared anonymity set.
Signed receipts, optional source-of-funds proofs, and selective disclosure are available if a counterparty or auditor needs them.
Privacy and compliance are both built into the protocol.
This is not legal advice. If you run a regulated business, talk to counsel.
Frequently asked questions
How do I send ETH privately?
Open curvy.box, sign in, click Send, paste the recipient's Curvy address, pick ETH and a chain, enter the amount, and confirm. The ETH lands at a one-time address only the recipient controls.
Do I need an external wallet to use Curvy?
No. Curvy has its own balance. You can fund it from any source and send straight from that balance. If you would rather use a wallet you already have, Curvy supports Rabby, MetaMask, and WalletConnect.
Can I send ETH anonymously?
You can send ETH to a destination that is not searchable as belonging to the recipient. If you also want the sender to be unlinkable, fund your Curvy balance from a source that is not tied to your identity.
Does the recipient need to be online when I send?
No. The recipient does not need to be online or connected. The transfer settles on chain immediately. They see the payment whenever they next open curvy.box.
Can I send private ETH on Base?
Yes. Base is one of the most popular chains for private ETH on Curvy because gas is very low. You pick Base as the chain when you set up the transfer.
How does the recipient spend the ETH I sent?
When the recipient opens curvy.box and sees the payment, they choose to hold it at the one-time address, sweep it to a wallet they normally use, or send it onward.
Is this a mixer?
No. Curvy never pools anything. Each transfer goes directly from the sender's balance to a fresh address only the recipient controls. Privacy comes from a new destination per payment, not from mixing.
Send a private payment in under a minute.
Curvy is privacy infrastructure for the chains the world uses, also known as 0xCurvy. Live at curvy.box.
Last updated: May 2026.