The short version
Unlisted is a web wallet whose balance lives inside a Helius Privacy Ring on Solana. The Ring keeps every balance as encrypted notes, and only your key can read yours.
You can send privately to other Unlisted accounts, pay x402 APIs through our relay, and withdraw to any Solana address. Unlisted never holds your keys or your balance.
Your private account
Connect Phantom, Solflare or Backpack and sign one message. Your browser turns that signature into the keys of a new private account: one key that spends, and a viewing key that decrypts your balance. The account has its own address, which isn't your wallet's.
Nothing is stored on our side. Sign the same message with the same wallet on another device and you get the same keys, and the same account, back. The account is registered once in the Ring's onchain registry, so other people can send to it.
Adding money
Add USDC or SOL from your wallet. The deposit is an ordinary public Solana transaction: anyone can see the amount, the token and the wallet it came from.
Inside the Ring it becomes an encrypted note that belongs to your private account. From then on, what you hold is hidden.
Private transfers
A private send spends some of your notes and creates new ones: one for the person you're paying, and one for your change. It's the UTXO model, like cash. Notes are created and spent, never edited.
Each transfer carries a Groth16 zero-knowledge proof, 192 bytes, that the notes are yours, haven't been spent before, and add up. The Solana Privacy Program checks that proof onchain, in about 140k compute units, inside one ordinary Solana transaction. There's no L2 and no sequencer.
The chain sees the two private account addresses and the proof. The amount and the token are encrypted.
Solana Privacy Program: ring1GaLCuJnkUMVkX2JeZLTTX17wKsV4fZmPVzXANW
Withdrawing
Withdraw to any Solana address, whenever you like. Like a deposit, a withdrawal is public: the amount, the token and the address it goes to show on chain.
Viewing keys and disclosure
Your viewing key decrypts every note you own, so it never leaves your browser. It's what turns the bars on an explorer back into your numbers.
Each transfer also has a key of its own. Share one, and an accountant or a counterparty can read that single transfer and nothing else.Soon
Paying x402 APIs
An x402 API charges per request in USDC. Unlisted pays it from your private balance through a relay, so the API never sees your wallet.
1. The API answers 402
It names a price in USDC and where to pay.
2. You pay the relay, privately
Your private account sends that exact amount to the relay's private account. The amount is encrypted.
3. The relay pays the API
It sees your payment land, pays the API from its own wallet, and hands you the API's response. The API only ever sees the relay.
The relay holds your payment only between steps 2 and 3, for the seconds it takes to pay. The developer notes are on the x402 page.
What's hidden, and what isn't
How much you hold Hidden
Your balance is encrypted notes that only your viewing key reads.
Which tokens you hold Hidden
USDC or SOL, the notes don't say.
The amount of a private send Hidden
The proof shows it adds up without showing what it is.
Who you paid with x402 Hidden
The relay pays the API, so the payer on record is the relay.
The two addresses on a private send Visible
Your private account and the other one. Anonymous Rings, under audit, are targeted for Q4 2026.
Money going into or out of the Ring Visible
Deposits and withdrawals show their amount, token and wallet.
Questions
Is it custodial?
No. Your keys are derived in your browser from your wallet's signature, and Unlisted never holds your balance. The one exception: during an x402 payment, the relay holds that amount for the seconds it takes to pay the API.
What's a Privacy Ring?
Helius's shielded pool on Solana, launched Nov 10, 2026. Balances are encrypted notes, and every transfer carries a zero-knowledge proof that the Solana Privacy Program verifies onchain.
Is it fully anonymous?
Not yet. Balances, tokens and amounts are hidden. The two addresses on a private send are visible, and so are deposits and withdrawals. Helius has anonymous Rings under audit, targeted for Q4 2026.
Which assets can I hold?
USDC and SOL.
Which wallets work?
Any Solana wallet that can sign a message, like Phantom, Solflare and Backpack. The wallet only signs. Your balance lives in a separate private account.
What does an x402 payment cost?
The API's own price. Unlisted's relay fee is 0 for now.
Can I prove a payment?
Soon. Per-transaction keys let you share one transfer without exposing the rest. It's next on the list.
What if Unlisted disappears?
Your balance is in the Ring, not with us. Any app built on the Helius SDK can withdraw it with the same keys, and you can derive those keys again from your wallet.