Mnemosyne OS MCP Server

by mnemosyne-osio.github.Mnemosyne-OS/mcpv2.0.0

Human-governed memory in local, domain-separated vaults with hybrid retrieval; also reads other coding agents' output. Requires the Mnemosyne OS desktop app.

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Active1d ago

Install Mnemosyne OS MCP server

claude mcp add mnemosyne-os -- npx -y @mnemosyne_os/mcp

{
  "mcpServers": {
    "mnemosyne-os": {
      "command": "npx",
      "args": [
        "-y",
        "@mnemosyne_os/mcp"
      ]
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "mnemosyne-os": {
      "command": "npx",
      "args": [
        "-y",
        "@mnemosyne_os/mcp"
      ]
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "mnemosyne-os": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@mnemosyne_os/mcp"
      ]
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "mnemosyne-os": {
      "command": "npx",
      "args": [
        "-y",
        "@mnemosyne_os/mcp"
      ]
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
MNEMO_DEFAULT_VAULT	—	—	Vault used when a call does not name one. The vaults are the user's own domains of memory (code, notes, journal); nothing outside the granted list is reachable.
MNEMO_VAULTS	—	—	Comma-separated list of vaults this server may reach. Narrow it: a vault left out here cannot be read even by mistake.
MNEMO_SDK_PORT	—	—	Port of the local Mnemosyne OS SDK server the desktop app listens on.