1 Create a Deepgram account
Open console.deepgram.com/signup and finish the signup — the $200 credit is applied automatically.
2 Create a project API key
From the console, open API Keys in the sidebar, click Create a New API Key, give it the scope Member or broader, copy the string that appears once.
3 Paste the key into Settings
In Agent Code, open Settings → Voice Dictation, paste the key into the Deepgram API Key row, and press Save. Your key is encrypted with your system keyring.
A note on the hotkey.
Dictation is triggered with Cmd+Shift+D by default: press once to record and again to finish, with no OS permission required. If you prefer holding Fn like macOS system dictation, switch the shortcut in Settings; macOS will then prompt for Accessibility permission the first time you enable dictation.