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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: the Builder updates and verifies its code, Terminal prepares any funding or session action the fix needs, progress shows on the agent’s card, and successful changes apply to every session of the agent from its next run. 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. When the Terminal shows a microphone, tap it 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.