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Circuit is available at app.circuit.org. You can use it directly from your browser, or add it to your home screen for a mobile-app-like experience:
  • iOS: Open app.circuit.org in Safari, tap Share, then Add to Home Screen.
  • Android: Open app.circuit.org in Chrome, tap ⋮, then Add to Home Screen.

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Create an account

Sign in with a passkey. Use a password manager such as iCloud Keychain, 1Password, or Google Password Manager to access it across devices. Add backup passkeys in Settings. To rotate a passkey, add its replacement before deleting the original.

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Use Terminal

Type or paste a question, trade, or strategy into Terminal. See the FAQ. Terminal is one conversation for questions, trades and agents. Name an agent to change it, or open its page and say what to change; trades and questions work in the same conversation, so you can fund an agent between changes. Type / in the message box for commands: /portfolio, /positions and /agents answer with a focused read, and New chat starts over. With an agent open, /review reports risks and gaps without changing code, and Backtest and Test run it. Attach images alongside your message using the image button, paste, or drag-and-drop anywhere in the conversation panel. Preview and remove images before sending. JPEG, PNG, WebP and GIF are supported, up to eight images, 3 MiB each and 6 MiB total. Images remain available in conversation history and when Terminal hands a request to the builder. In the Terminal, tap the microphone to dictate. It finishes when you stop speaking; Done ends recording immediately. Review the text, amounts and token names, then press Send. Cancel discards the recording; recordings stop after two minutes. Allow microphone access when your browser asks. Circuit does not save the audio.

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Set up your wallets

Agents need a wallet to run on. You can create a new one (provisioned by Circuit) or import an existing wallet by private key. See Wallets & Security for key export and signing protection.