Mnemosyne OS

Name: Mnemosyne OS
Author: Mnemosyne-OS

by Mnemosyne-OSversion 2.1.3i★ –iRuns on your computer

Registry nameio.github.Mnemosyne-OS/mcp

Install

Overview

Description from the maker (original English)

Memory the human governs, on their own machine, plus what other coding agents here wrote.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Developer tools

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: MNEMO_DEFAULT_VAULT, MNEMO_VAULTS, MNEMO_SDK_PORT

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "mnemosyne-os": {
      "command": "npx",
      "args": [
        "-y",
        "@mnemosyne_os/mcp"
      ],
      "env": {
        "MNEMO_DEFAULT_VAULT": "your-value",
        "MNEMO_VAULTS": "your-value",
        "MNEMO_SDK_PORT": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add mnemosyne-os --env MNEMO_DEFAULT_VAULT=your-value --env MNEMO_VAULTS=your-value --env MNEMO_SDK_PORT=your-value -- npx -y @mnemosyne_os/mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "mnemosyne-os": {
      "command": "npx",
      "args": [
        "-y",
        "@mnemosyne_os/mcp"
      ],
      "env": {
        "MNEMO_DEFAULT_VAULT": "your-value",
        "MNEMO_VAULTS": "your-value",
        "MNEMO_SDK_PORT": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "mnemosyne-os": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@mnemosyne_os/mcp"
      ],
      "env": {
        "MNEMO_DEFAULT_VAULT": "your-value",
        "MNEMO_VAULTS": "your-value",
        "MNEMO_SDK_PORT": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

MNEMO_DEFAULT_VAULT env
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 env
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 env
Port of the local Mnemosyne OS SDK server the desktop app listens on.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account Mnemosyne-OS, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Developer toolsi

More stars than 0% of the other 4901 servers in this category
Published to the registry more recently than 66% of the other 4901 servers in this category
Basic checks equal to or better than 100% of the other 4901 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Mnemosyne OS safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (2.1.3) reached the registry 21 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: GitHub, Desktop Commander, Cloudflare MCP

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

GitHub

by github

GitHub’s official server lets AI read and manage code, issues and pull requests in your account. Use GitHub’s hosted version or run it locally with Docker.

Computer or cloud★ 34,245MITUpdated 4 days ago

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Desktop Commander

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MCP server for terminal commands, file operations, and process management

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Cloudflare MCP

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Runs in the cloud★ 4,446Apache-2.0Updated 14 months ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

The sovereign AI Operating System

Open to build on · Private at the core

English&ensp;·&ensp; Français&ensp;·&ensp; Español&ensp;·&ensp; Deutsch&ensp;·&ensp; Português&ensp;·&ensp; Русский&ensp;·&ensp; 中文

*Everyone is building the intelligence. Mnemosyne OS builds the relationship: the memory that makes an AI truly know you, across sessions and across time. On your machine. Yours to see.*

→ Why the relationship layer

v2.1.0 · The Local Model is out. Irina still works on her harnesses · watch with sound

⭐ Useful to you? A star on this repo helps other people find it.

🔏 Every installer above is cryptographically attested to this exact repo, workflow and commit, via GitHub Artifact Attestations (Sigstore-backed build provenance). Don't take the download on faith: verify the file you got matches what our CI actually built:

gh attestation verify Mnemosyne-OS-Infinity-Setup-x64.exe -R Mnemosyne-OS/Mnemosyne-Neural-OS

🌐 [mnemosyne-os.io](https://mnemosyne-os.io), the product, for builders&ensp;·&ensp;[mnemosyne-os.com](https://mnemosyne-os.com), the company, press & labs&ensp;·&ensp;📖 [docs.mnemosyne-os.io](https://docs.mnemosyne-os.io), the user guide

[!IMPORTANT]

🧠 New in 2.1.0 · The Local Model. LFM3, a 1.1 GB model from Liquid AI, is the new

default local model: it runs on your machine, even without a graphics card. A review

widget your coding agent drives over MCP, an improved Notion connector, and the

translations reviewed in four languages.

[→ The release notes](https://github.com/Mnemosyne-OS/Mnemosyne-Neural-OS/releases/tag/v2.1.0-infinity) · Connect your coding agent

[!TIP]

📖 The user documentation is live at [docs.mnemosyne-os.io](https://docs.mnemosyne-os.io), with every engine explained step by step, in

English · Français · Español.

For developers


🔌 Give your coding agent a memory	`npx -y @mnemosyne_os/mcp` connects Claude Code, Cursor or Claude Desktop to your vaults. Setup guide
🧩 Build an app on the memory	Copy the cartridge boilerplate for an app inside the Mnemosyne window, or run `npm create @mnemosyne_os/app` for a separate program (a Layer 2 app). Build on Mnemosyne OS
📖 Learn from real cartridges	Their full source is public. Clone one
🧠 Index your agent's own notes	Point a vault at `.claude`, `.cursor` or `.aider`. Two doors between your IDE and your memory

🌍 Fully multilingual: the OS speaks your language

The entire interface is localized in seven languages: onboarding, settings, chat, the voice assistant, every dialog. Switching language even re-selects the ★ recommended embedding model for it, so retrieval quality follows your language, not just the labels. Open windows pick the change up instantly.

Language		Status
English	Your memory. Your machine. Your rules.	Stable
Français	Ta mémoire. Ta machine. Tes règles.	Stable
Español	Tu memoria. Tu máquina. Tus reglas.	Stable
Deutsch	Dein Gedächtnis. Deine Maschine. Deine Regeln.	Beta
Português	Sua memória. Sua máquina. Suas regras.	Beta
Русский	Твоя память. Твоя машина. Твои правила.	Beta
中文	你的记忆。你的机器。你的规则。	Beta

*Sovereign, local-first memory, in your language: un système d'exploitation de mémoire souverain et local · un sistema operativo de memoria soberano y local · ein souveränes, lokales Gedächtnis-Betriebssystem · um sistema operacional de memória soberano e local · суверенная локальная операционная система памяти · 主权的本地优先记忆操作系统.*

Not another agent-memory library

Mem0, Zep and Letta give *agents* a memory layer you wire into a cloud stack.

Mnemosyne OS is the control surface for your memory, your agents and your models, and it runs on your machine. You choose which model may read your memory, and a human governs it. On LongMemEval-M holdout questions, never used to tune the engine, it scores 77.1% in hybrid mode: embeddings and search on your machine, answers from a cloud model, gemini-3.8-flash (audit it yourself).

The AI that remembers *you*, not infrastructure you plug into someone else's.

Where the project lives

Published by XPACEGEMS LLC. These are its official addresses:


Product	mnemosyne-os.io
Organizations	mnemosyne-os.com
Documentation	docs.mnemosyne-os.io
Source	this repository
Packages	the npm scope `@mnemosyne_os`: the list

Why call it an "OS"?

Not because it has a kernel or drivers. Because it does what an OS does: it manages resources on behalf of processes that shouldn't have to manage them themselves. Linux does that for programs (CPU, RAM, disk, network). Mnemosyne OS does the same thing for AI agents, and the resources are just different:

An agent needs	Mnemosyne OS manages it via
Memory	Vaults, SQLite + vector stores, partitioned by domain, with AES-256 encryption at rest you arm
Context	Chronicles + semantic retrieval, the agent never rebuilds its past by hand
Compute	Routing across model tiers (budget/standard/premium, local/cloud) by task complexity
Hardware	Real GPU/CPU dispatch for local speech (CUDA detection, isolated sidecars) so a heavy model never blocks the app
I/O	A signed intent protocol (query / ingest / forget / focus) instead of raw reads and writes
Security	FGAC, scoped JWTs, Zero-Trust IPC validation
Persistence	Cross-session continuity, no cold start on every invocation

This isn't a marketing stretch invented for this repo. MemGPT (Packer et al., UC Berkeley, 2023, arXiv:2310.08560) proposed the same "OS for LLMs" analogy in a peer-reviewed paper, virtual context management modeled on OS memory hierarchies. Mnemosyne OS takes that same premise further: not a single-session context-paging technique, but a system that r

Only the beginning is shown; read the rest in the repo

Mnemosyne OS

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Developer toolsi

Common questions

Alternatives

GitHub

Desktop Commander

Cloudflare MCP

README from the maker

The sovereign AI Operating System

For developers

🌍 Fully multilingual: the OS speaks your language

Not another agent-memory library

Where the project lives

Why call it an "OS"?