Second Brain for AI v2 is an open-source memory layer that gives your AI assistants persistent context across every conversation and every tool. Every time you start a new chat with Claude, ChatGPT, or Cursor, you lose all context from previous sessions — forcing you to re-explain your projects, decisions, and preferences. Second Brain solves this by providing a self-hosted, Cloudflare-powered memory system that works with any MCP-compatible AI tool, remembering your context and surfacing it automatically when relevant.
Core Features
- Universal MCP Support: One Worker URL connects to Claude Desktop, Claude Code, ChatGPT, Cursor, Windsurf, and every other MCP-compatible client — creating a single shared memory across all your AI tools
- Semantic Recall: Searches by meaning rather than keywords — a query about "checkout problems" surfaces memories about "users abandoning cart" even without exact word matches
- AI Synthesis: Ask "what did I decide about the pricing model?" and get a direct synthesized answer, not a dump of raw memory entries
- Smart Merge and Conflict Resolution: Automatically detects contradictions, merges near-duplicates, and blocks exact duplicates — keeping your memory clean over months of use
- Pattern Derivation: Scans your memories after every recall and surfaces recurring themes you never explicitly wrote down, like "You revisit this tradeoff every quarter"
- Self-Hosted on Cloudflare: One-click deploy to your own Cloudflare account — your data stays yours, covered by the free tier with no credit card required
- Web Dashboard and Ecosystem: Browse, search, edit, and export memories via a full web UI, plus CLI, Obsidian plugin, and iOS Shortcuts integrations
Use Cases
Second Brain for AI is ideal for developers who use multiple AI coding assistants and need project context to persist across sessions. Researchers tracking evolving ideas benefit from semantic recall that connects related concepts. Content creators and writers can maintain consistent brand guidelines and narrative threads across AI-assisted drafting sessions. Power users of AI tools who switch between ChatGPT, Claude, and Cursor throughout the day can finally stop re-explaining context. The tool is open-source (MIT licensed) and free forever at personal scale, making it accessible to individual developers, freelancers, and small teams.
Pricing
Second Brain for AI v2 is completely free and open-source under the MIT license. It runs on Cloudflare's free tier, so there are no hosting costs for personal use. No usage limits, no per-item billing, and no vendor lock-in.
How to Access
Official website: Second Brain for AI v2
