Use Brain in Claude (web, desktop & mobile)

Beyond the CLI plugin, you can reach your brain from the Claude apps — web, desktop, Cowork, and your phone — through the Brain connector, a remote MCP server hosted by Brain Cloud. Add it once on the web and it syncs to every Claude client on your account.

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Read and write (beta). The connector exposes five tools: Recall memories and Brain status (read), plus Memorize, Pin, and Unpin (write). Writes prompt you for confirmation and sync back to Brain Cloud, so a memory you capture on your phone shows up on your laptop. (Deleting memories from the apps is not exposed yet — use the CLI's /brain:forget.)

Before you start

You need a Brain Cloud account and your brain pushed to it:

brain cloud login     # sign in (use the Google account you'll use in Claude)
brain cloud push      # upload ~/.brain to the cloud

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Use one identity. The connector serves the brain of whichever Google account you sign into Claude with. Make sure that's the same account you logged into Brain Cloud with above — otherwise the connector will open an empty brain.

Add the connector

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Open the connector settings

On claude.ai (web), go to Settings → Connectors → Add custom connector.

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Enter the URL

Name it Brain and paste the server URL:

https://mcp.brainmemory.ai/mcp

Leave OAuth Client ID / Secret blank — the connector registers Claude automatically. Click Add.

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Sign in

Claude opens a sign-in page → Sign in with Google with the account that holds your brain → approve. The connector now shows its tools: Recall memories, Brain status, Memorize, Pin, and Unpin.

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Use it (incl. your phone)

Connectors sync to all your Claude clients — open Claude on your iPhone/Android and it's already there. Recall:

"Use Brain to recall what I decided about X."

Or capture something — Claude will ask you to confirm the write:

"Use Brain to remember: we picked Postgres over DynamoDB for the billing service."

Then recall it later from any device. If Claude answers from general knowledge instead of recalling, nudge it: "use the Brain connector…".

Keeping it current

Memories you write from the apps sync back to Brain Cloud automatically — capture on your phone, recall on your laptop. The connector also pulls a fresh copy of your brain each time you sign in. The one gap: memories you create locally (CLI /brain:memorize) reach the apps after a brain cloud push (or /brain:memorize --sync).

Troubleshooting

"Server not found" when signing in — your browser cached an old DNS answer; quit/reopen the browser (or clear its DNS cache) and retry the connect.
Recall looks empty — you're likely signed into Claude with a different Google account than the one holding your brain, or a brain cloud push is due.
Claude won't use it — say "use the Brain connector" explicitly.

Prefer no cloud?

The connector requires Brain Cloud (it's how the apps reach your brain). If you'd rather avoid a hosted service entirely, the CLI plugin + portable sync (git, any synced folder, or encrypted export) keep your brain across machines with no account.