Accounts, without the crypto

Sign in. That's the whole thing.

An email and a password gets your users a real smart account, secured by a passkey. No seed phrase, no extension, no gas prompt, nothing to understand.

01 — Setup

Live in an afternoon.

Pick how people sign in. Email code, Google, passkey, World — any of them, in any combination, from a form.

Email OTAGooglePasskeyWorld
02 — Two ways in

Private, or fast.

Email and a password, where the password never leaves the browser. Or Google, in one click. Your app picks which it accepts.

Email + passwordGoogleYour choice
03 — Ownership

Nobody holds the door.

Credentials are salted hashes on chain. No operator maps an address back to a person, and no operator can lock anyone out.

Staked nodesNo central DBSlashable
04 — Recovery

More than one way back.

A passkey, a second provider, a World proof, or your own wallet. Lose a phone, not an account.

PasskeyWorldAny EOA
05 — Money

Pay in what you hold.

Prices in one token, wallets in another. The swap rides inside the payment, so nobody sees a swap screen.

UniswapExact outputOne signature
06 — Keys

Bounded by design.

Session keys expire and cannot spend past their cap. Recovery waits in the open, where you can stop it.

Spend capsTimelockVeto
Four lines. That's it.

And they have an account.

No auth code, no user table, no password resets, no support ticket that begins “I lost my”. Your app gets an address and gets on with it.

$ npm i @yuin/sdk

// your app
const yuin = createClient({ app })
await yuin.login()

// that's their account
yuin.account
✉
Email + password
→
Yuin
→
◈
Their account
Nobody holds the key.
Not even us.
Why Yuin

No lock-in.
By construction.

Embedded wallets know which email owns which address, and if they go down your users are locked out. We never have that mapping, so we could not sell it, leak it, or hold it hostage.

DIY auth
Embedded wallet
Yuin
Works if we disappear
✓
—
✓
Users can walk away with it
—
—
✓
Passkeys + social
Integrate
✓
✓
Central user DB
Usually
Usually
No
Seed phrases
—
Hidden
Never
Make an account →

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