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Wallets and other apps give their users Circuit by opening one link. Circuit’s own interface handles sign-in, agents, trading and approvals, so your app never handles passkeys, keys or Circuit credentials.

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Register

Send Circuit your app id (lowercase letters, digits and -, up to 32 characters), display name and, optionally, a Hyperliquid builder address and fee between 0.001% and 0.1%. Circuit registers it in staging and production.

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Open Circuit

Open https://app.circuit.org/?app=<app id> (staging: https://app.staging.circuit.org/?app=<app id>). The user signs in or creates an account with a passkey, then approves Continue in your app, which names your app and its builder fee. The session lasts seven days; opening the link after that asks again. Passkeys for circuit.org only work in a real browser: on iOS use SFSafariViewController or ASWebAuthenticationSession, on Android a Custom Tab, never an embedded web view.

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What your app gets

  • Every Hyperliquid order placed in the session, including by agents started in it, carries your builder code. Each wallet approves your fee once, as Hyperliquid account setup.
  • Connected apps lists your app. Disconnecting ends the session and pauses agents started in it until the user renews their authorization.
  • Your app receives no permit, wallet access or account data.
Apps that need their own interface instead of Circuit’s use the permit handoff.