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AI and media

Second Brain

io.github.ara-5/second-brain ยท v1.7.1

Shared Graph-RAG memory for AI agents: markdown vault, wikilink recall, tasks, messaging.

Source code Set it up

Connect Runs on your machine

Terminal
claude mcp add second-brain -e BRAIN_VAULT=<BRAIN_VAULT> -e BRAIN_PORT=<BRAIN_PORT> -e BRAIN_KEY=<BRAIN_KEY> -- npx -y [email protected]
claude_desktop_config.json
{
  "mcpServers": {
    "second-brain": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "BRAIN_VAULT": "<BRAIN_VAULT>",
        "BRAIN_PORT": "<BRAIN_PORT>",
        "BRAIN_KEY": "<BRAIN_KEY>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "second-brain": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "BRAIN_VAULT": "<BRAIN_VAULT>",
        "BRAIN_PORT": "<BRAIN_PORT>",
        "BRAIN_KEY": "<BRAIN_KEY>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "second-brain": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "BRAIN_VAULT": "<BRAIN_VAULT>",
        "BRAIN_PORT": "<BRAIN_PORT>",
        "BRAIN_KEY": "<BRAIN_KEY>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
BRAIN_VAULT
Optional		Folder holding the markdown vault. Defaults to ~/.second-brain/vault when installed from npm.
BRAIN_PORT
Optional		Port of the local API server the MCP server starts and talks to (default 3747).
BRAIN_KEY
Optional, secret		Optional API key; when set the local API requires it as a Bearer token.

Details

Package[email protected] (NPM, stdio)
First published3 Nov 2026
Last updated3 Nov 2026
Registry nameio.github.ara-5/second-brain

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