segundo-cerebro

Overview

Segundo Cérebro is a sophisticated MCP server that transforms Claude into a personal knowledge management system. It builds a knowledge graph by atomizing concepts into individual notes with substantive connections between ideas across different domains. The server leverages Cloudflare's D1, Vectorize, and Workers AI to provide sovereign, self-hosted knowledge management without third-party dependencies. Its unique approach emphasizes latticework thinking, forcing connections between ideas based on shared mechanisms rather than surface-level relationships.

Try asking AI

After installing, here are 5 things you can ask your AI assistant:

• recall

  Searches the knowledge graph for analogies across different domains

  Try:Find analogies between software architecture patterns and biological systemsTry:Recall concepts similar to decision trees in other domains
• save_note

  Saves an atomic concept to the knowledge graph with connections to existing concepts

  Try:Save this idea: Feedback loops compound over time like interestTry:Create a note about how ant colonies solve problems through decentralized decision making
• get_note

  Retrieves the full content of a specific concept from the knowledge graph

  Try:Get the full note about compounding feedback loopsTry:Show me the complete concept about ant colony problem solving

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Installation

{
  "mcpServers": {
    "segundo-cerebro": {
      "command": "npx",
      "args": ["segundo-cerebro", "mcp"]
    }
  }
}

FAQ

What Cloudflare resources does this use?

It uses Cloudflare Workers (server), D1 (SQLite database), Vectorize (embeddings), Workers AI (embeddings), and KV (OAuth tokens). All run on free tier.

How much does it cost to use?

The Cloudflare infrastructure is free, but there's ~2,400 token overhead per MCP request. Free plan isn't recommended, Pro is acceptable, and Max plans work best.

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