Install CyberFox Brain

CyberFox Brain connects to Claude and ChatGPT as a single remote MCP server. There’s no API key to paste — you sign in with the same account you use everywhere else.

Connector URL

https://mcp.cyberfoxai.com/mcp

In Claude

  1. Open Settings → Connectors → Add custom connector.

  2. Paste the connector URL: https://mcp.cyberfoxai.com/mcp

  3. Claude opens a Google or email-magic-link sign-in. Approve it, and the connector is ready — no token to copy anywhere.

In ChatGPT

  1. On the web, open Settings → Security and login and turn on Developer mode. This requires a Plus, Pro, Business, Enterprise, or Education account — Free and Go plans can’t add custom connectors.

  2. Go to chatgpt.com/plugins, choose +, and create an app for a remote MCP server pointed at the connector URL above. It lands under Drafts.

  3. ChatGPT doesn’t attach connectors automatically. Each conversation, pick Developer mode from the composer’s + menu and select the app.

  4. If the server’s tools change after you’ve connected, open the app’s details and hit Refresh to re-pull them.

Sign in before you're added

An invited person has to sign in once, themselves, before the brain owner can add them as a member. Adding someone who has never signed in returns “not registered” — have them connect first, then add them.

Your first session

Every session on a brain should open by calling start_here. It returns that brain’s conventions, recent activity from every teammate and their AI sessions, and any open tasks — everything a cold session needs before it reads or writes anything else.

Export and import

Every brain can be exported as a plain markdown zip, any time, from the web app — one file per note, nothing proprietary. That export is also the backup you take before importing an existing vault: point the import wizard at a folder of markdown files, preview exactly what will be created, skipped, or overwritten, and confirm before anything is written. The connector remains the only way to author notes day to day; the web app handles moving a whole brain in or out.