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Second Brain — Documentation

Welcome to the Second Brain wiki. Second Brain is a self-hosted memory system on Cloudflare Workers for MCP-compatible AI tools. It gives one person a private brain, or a team private personal layers plus a shared company layer.

The easiest way to get started is the desktop app — download it for Mac or Windows and it sets everything up for you in about two minutes, no terminal required. See the Setup Guide for that and the two do-it-yourself methods.

Pages

• Setup Guide — desktop app, one-click Cloudflare deploy, and manual setup
• Team Setup — share a brain with colleagues: two layers, roles, invites
• Connect to AI Clients — ChatGPT, Claude, Codex, Cursor, and other MCP clients
• Cursor Instructions — MCP plus Cursor Rules for recall and remember
• Capture from Anywhere — bookmarklet, iOS Shortcuts, share sheet
• Notion Integration — mirror shared Notion pages into memory
• Obsidian Plugin — install, configure, sync modes
• API Reference — REST endpoints, team administration, and MCP tools
• How It Works — semantic search, chunking, duplicate detection
• Web UI — UI dashboard to manage your memories
• How to Upgrade — upgrade instructions for one-click and manual deployments
• Local Development — run the Worker locally and share it for testing
• Frequently Asked Questions

Quick links

• Download the desktop app
• GitHub repo
• Deploy to Cloudflare
• Discussions