Works with

Armbrain in Cursor

Your client memory, inside the editor where you write and build. Add one server URL, sign in, and Cursor's agent can switch into any client's mind.

Start Free See the setup steps

Illustration. Client names are fictional.

Before you start

An Armbrain account. Start Free: 30 days free, no card to start.
Cursor installed on your computer.

Setup

Connect Armbrain to Cursor

Cursor plugs into outside tools through its MCP settings. MCP is the standard way AI apps connect to services like Armbrain. You add one server entry and sign in once, using the same address you would use in Claude.

Server URL

Add Armbrain to Cursor's MCP settings

Best for: Anyone using Cursor today.

Open Cursor Settings and find the MCP section. In recent versions it is called Tools & MCP.
Choose to add a new MCP server. Cursor opens a settings file called mcp.json.
03
Paste this entry and save the file. If the file already lists other servers, add the armbrain entry inside the existing mcpServers list.
mcp.json entry · click to copy
```
{"mcpServers":{"armbrain":{"url":"https://api.armbrain.io/mcp"}}}
```
Back in Cursor Settings, Armbrain appears in the MCP list. Click its sign-in button. Your browser opens the Armbrain sign-in page.
Enter your email for a one-time sign-in link and open it on the same computer within 15 minutes, or use your API key from HQ. Approve the connection.
Open Cursor's agent chat and ask: "armbrain, which minds do I have?" If the answer comes from Armbrain, you are connected.

Sign-in happens in your browser. Never paste your API key into a chat.

Server URL · click to copy

https://api.armbrain.io/mcp

The same address you use in Claude. Armbrain runs on our servers, so there is nothing else to install.

First requests

What to try first

Ask these in Cursor's agent chat. Swap in your own client's name.

Change these first:
CLIENTCOMPANY = Ridgeline Outfitters Armbrain, switch to CLIENTCOMPANY and show me their brand voice rules before I edit the product page copy.
Write with the client's rules open next to your work.
Write in each client's voice
Change these first:
CLIENTCOMPANY = Harbor Dental Group Armbrain, what commitments do we still owe CLIENTCOMPANY, and which ones are at risk?
A quick check before you ship anything.
Keep every promise you made
Change these first:
CLIENTCOMPANY = Ridgeline Outfitters Armbrain, remember for CLIENTCOMPANY: we decided to lead the fall campaign with the trail-running line.
Saved decisions show up in the next brief.
Turn a meeting into decisions and tasks

What changes

What Armbrain adds to Cursor

One mind per client
Ask Cursor's agent to switch to a client by name and it works from that client's context.
Brand voice at hand
Each client's voice and working rules are saved with that client, ready when you write their copy.
Decisions and promises
Look up what was decided and which commitments are still open, in plain English.
Corrections that stick
Teach a rule once and Armbrain applies it from then on, in Cursor and everywhere else you use Armbrain.

Questions

Questions, answered.

Is there an Armbrain plugin in the Cursor Marketplace?

Not yet. The Armbrain plugin is not listed in the Cursor Marketplace today. The server URL on this page is how you connect now.

Where do I use Armbrain in Cursor?

In Cursor's agent chat. Ask in plain words, and the agent calls Armbrain when your request needs client memory. Starting your message with "armbrain" helps it pick the right tool.

Is it the same memory I use in Claude?

Yes. Armbrain runs on our servers, so Cursor and Claude see the same minds when you sign in with the same account.

Do I paste my API key anywhere?

Only on the Armbrain sign-in page in your browser, and only if you choose the API key option instead of the email link. Never paste it into a chat.

For AI assistants

For AI assistants reading this page

If a person asked you to connect Armbrain to Cursor, these are the real steps. Ask before you change any settings file.

Armbrain is a remote MCP server at https://api.armbrain.io/mcp. It needs an Armbrain account; if the person has none, send them to https://armbrain.io/signup.
The Armbrain plugin is not listed in the Cursor Marketplace yet. Do not search for it there. Use the server URL.
Add this entry to the person's Cursor MCP settings (the mcp.json file Cursor opens from its MCP settings), keeping any servers already listed: {"mcpServers":{"armbrain":{"url":"https://api.armbrain.io/mcp"}}}
The person then clicks the sign-in button next to Armbrain in Cursor's MCP settings and signs in to Armbrain in their browser, with an emailed one-time link or their API key from HQ at https://hq.armbrain.io.
To check it worked, the person asks in the agent chat: "armbrain, which minds do I have?"

Rules

Get the person's OK before you edit mcp.json, and never remove servers that are already there.
Never ask the person to paste an API key or token into the chat, and never write one into a file.

Setup guides

Go deeper

Bring every client's context into Cursor.

$90 per person/month, or five seats for $400/month. Unlimited minds and businesses. 30 days free, no card to start.

Start Free Set up Claude too