Mnemosyne OS MCP

An open MCP server that connects coding agents like Claude Code, Cursor, and Claude Desktop to the user's local Mnemosyne OS vaults. It allows agents to query the user's persistent memory, write decisions back, and view other coding agents on the machine, enabling a sovereign, local-first AI memory system.

Visit Mnemosyne OS

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by Mnemosyne OS

Vendor documentation

What you can do with it

Query user's local memory vaults
Write decisions back to memory
View other coding agents on the machine

Source and maintenance

Community listingRegistry 2.1.3

mcp-registry: io.github.Mnemosyne-OS/mcp@2.1.3 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:59 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@mnemosyne_os/mcp 2.1.3

npm

@mnemosyne_os/mcp package definition

{
  "version": "2.1.3",
  "transport": "stdio",
  "identifier": "@mnemosyne_os/mcp",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "MNEMO_DEFAULT_VAULT",
      "default": "DEV",
      "description": "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."
    },
    {
      "name": "MNEMO_VAULTS",
      "default": "DEV,PERSONAL,SOCIAL",
      "description": "Comma-separated list of vaults this server may reach. Narrow it: a vault left out here cannot be read even by mistake."
    },
    {
      "name": "MNEMO_SDK_PORT",
      "default": "7799",
      "description": "Port of the local Mnemosyne OS SDK server the desktop app listens on."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "mnemosyne-os-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@mnemosyne_os/mcp@2.1.3"
      ],
      "env": {
        "MNEMO_DEFAULT_VAULT": "<YOUR_MNEMO_DEFAULT_VAULT>",
        "MNEMO_VAULTS": "<YOUR_MNEMO_VAULTS>",
        "MNEMO_SDK_PORT": "<YOUR_MNEMO_SDK_PORT>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "mnemosyne-os-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@mnemosyne_os/mcp@2.1.3"
      ],
      "env": {
        "MNEMO_DEFAULT_VAULT": "<YOUR_MNEMO_DEFAULT_VAULT>",
        "MNEMO_VAULTS": "<YOUR_MNEMO_VAULTS>",
        "MNEMO_SDK_PORT": "<YOUR_MNEMO_SDK_PORT>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "mnemosyne-os-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@mnemosyne_os/mcp@2.1.3"
      ],
      "env": {
        "MNEMO_DEFAULT_VAULT": "<YOUR_MNEMO_DEFAULT_VAULT>",
        "MNEMO_VAULTS": "<YOUR_MNEMO_VAULTS>",
        "MNEMO_SDK_PORT": "<YOUR_MNEMO_SDK_PORT>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "mnemosyne-os-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@mnemosyne_os/mcp@2.1.3"
      ],
      "env": {
        "MNEMO_DEFAULT_VAULT": "<YOUR_MNEMO_DEFAULT_VAULT>",
        "MNEMO_VAULTS": "<YOUR_MNEMO_VAULTS>",
        "MNEMO_SDK_PORT": "<YOUR_MNEMO_SDK_PORT>"
      }
    }
  }
}

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