Welcome to the Second Brain wiki. Second Brain is a self-hosted MCP server on Cloudflare Workers that gives every AI tool you use a shared, searchable memory 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.

• Setup Guide — desktop app, one-click Cloudflare deploy, and manual setup
• Connect to AI Clients — Claude Desktop, Claude Code, claude.ai, iOS
• 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 (/capture, /append, /update, /list, /recall, /forget, /count, /tags, /stats, /chat, /digest) 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
• Frequently Asked Questions

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