LocalFree

Claude Second Brain MCP server

GitGudatCodeing/claude-second-brain

Local hybrid keyword + vector search (SQLite FTS5 + sqlite-vec) over markdown vaults and code.

1 GitHub stars
Source code

Install Claude Second Brain in Claude Code

Claude Code
claude mcp add claude-second-brain -- uvx vault-index
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "claude-second-brain": {
      "command": "uvx",
      "args": [
        "vault-index"
      ]
    }
  }
}

Frequently asked questions

What does the Claude Second Brain MCP server do?

Local hybrid keyword + vector search (SQLite FTS5 + sqlite-vec) over markdown vaults and code.

Is the Claude Second Brain MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does Claude Second Brain run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Claude Second Brain to Claude Code?

Run: claude mcp add claude-second-brain -- uvx vault-index

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