Mnemo

Name: Mnemo
Author: n24q02m

by n24q02mversion 2.21.0i★ –iRuns on your computer

Registry nameio.github.n24q02m/mnemo

Install

Overview

Description from the maker (original English)

Persistent AI memory with hybrid search and embedded sync. Open, free, unlimited.

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: Streamable HTTP
Category: Search & AI memory
You need to fill in: API_KEYS

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: API_KEYS

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

PyPIPython’s uv installed (for the uvx 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": {
    "mnemo": {
      "command": "uvx",
      "args": [
        "mnemo-mcp"
      ],
      "env": {
        "API_KEYS": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add mnemo --env API_KEYS=your-value -- uvx mnemo-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": {
    "mnemo": {
      "command": "uvx",
      "args": [
        "mnemo-mcp"
      ],
      "env": {
        "API_KEYS": "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": {
    "mnemo": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "mnemo-mcp"
      ],
      "env": {
        "API_KEYS": "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

API_KEYS secret env
Provider API keys (format: PROVIDER_API_KEY:key,...). Select models per task with EMBEDDING_MODELS / RERANK_MODELS / LLM_MODELS (CSV provider/model, order = litellm fallback); provider is inferred fr…

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 n24q02m, 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 Search & AI memoryi

More stars than 0% of the other 7254 servers in this category
Published to the registry more recently than 77% of the other 7254 servers in this category
Basic checks equal to or better than 100% of the other 7254 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 Mnemo 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?

You need to fill in: API_KEYS

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 (2.21.0) reached the registry 10 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: Context7, Codebase Memory, Exa

Alternatives

Servers in the same category from other makers, sorted by stars.

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

Context7

by upstash

Feeds AI the latest docs for libraries and frameworks before it answers, so code it writes does not use outdated, removed functions.

Computer or cloud★ 64,224MITUpdated today

Install

Codebase Memory

by DeusData

Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.

Runs on your computer★ 48,148MITUpdated 20 days ago

Install

Exa

by exa-labs

Connect AI agents to Exa for web search, content fetching, and multi-step research.

Runs in the cloud★ 5,213MITUpdated last month

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.

Mnemo MCP Server

Distribution & CLI: the repo and CLI are mnemo. The PyPI distribution is `n24q02m-mnemo` (install pip install n24q02m-mnemo / uvx n24q02m-mnemo). The MCP server remains available: run mnemo (or legacy mnemo-mcp).

mcp-name: io.github.n24q02m/mnemo

Persistent AI memory with hybrid search. Open, free, unlimited.

Sister projects from n24q02m (click to expand)

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mcp-core	Shared foundation for building MCP servers -- Streamable HTTP transport, OAut...	MCP
mnemo	Persistent AI memory with hybrid search and embedded sync. Open, free, unlimi...	MCP
fastretrieval	Multi-model retrieval runtime for ONNX/GGUF embeddings and reranking	Library
skret	Secrets without the server.	CLI
tacet	A self-distilling neuro-symbolic cascade that amortises LLM cost across knowl...	Tooling
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Features
Quick install
Status
Documentation
Smithery
Tools
Security
Build from Source
CLI
Self-hosting (local HTTP instance)
Remote (HTTP mode)
Trust Model
License

Roadmap (current = Phase 3 / v2.x)

Phase rows below describe the pre-de-host design history (v1.x / early v2):

multi-provider LLM dispatch, GDrive/S3 passport sync, and Cloudflare

deployment were removed in the 2026-09 de-host. Current architecture:

one local SQLite store (WAL), per-task [models.*] provider cells

(OpenRouter pre-wired default), no embedded sync (backup = rclone).

Phase	Version	Status	Highlights
Phase 1	v1.x	Shipped	Typed `memory(action="capture")` (6 context_types + dedup) -- RRF (k=60) hybrid fusion + cross-encoder rerank + temporal decay -- importance x recency archive policy + restore -- Alembic migrations -- multi-provider LLM dispatch (pre-de-host) -- plugin trinity (recall-context + memory-commit skills, SessionStart + opt-in PostToolUse hooks)
Phase 2	v1.x+1	Shipped, partially removed	LLM-driven compression of older memories (kept, now via `[models.chat]` cell) + Passport sync (encrypted import/export bundle; removed 2026-09)
Phase 3	v2.0.0	Shipped (BREAKING)	Temporal knowledge graph -- bitemporal `valid_from` / `valid_to` columns -- entity resolution via embedding KNN -- `entity_search` / `entity_graph` / `history` actions -- `KG_AUTO_ENABLED` opt-in auto-extract on capture

Features

Hybrid retrieval -- FTS5 + vector search (sqlite-vec), fused via Reciprocal Rank Fusion (k=60), then re-ranked via the [models.rerank] provider cell (OpenRouter pre-wired default) with the local Fastretrieval Qwen3 cross-encoder as fallback, plus temporal decay and importance boost
Typed capture -- memory(action="capture") with 6 context_types (conversation/fact/preference/skill/task/decision), embedding-based dedup, and optional [models.chat]-cell compression + importance scoring
Knowledge graph -- Automatic entity extraction and relation tracking; top results boosted by graph proximity
Importance scoring + archive policy -- LLM-scored 0.0-1.0 importance; soft-archive when recency_factor * (1 - importance) > 1.0; restore action available
Auto-archive trigger -- Background sweep every Nth capture (default 100) -- no cron required
STM-to-LTM consolidation -- LLM summarization of related memories in a category
Duplicate detection -- Warns before adding semantically similar memories
Zero config -- Fastretrieval's built-in local registry resolves Qwen3 ONNX embedding + reranking, no API keys needed. Optional cloud calls go through per-task [models. ] provider cells (OpenAI-spec; OpenRouter pre-wired default)
Local-first storage -- one SQLite file (WAL) under ~/.mnemo/; backup and cross-machine migration = rclone outside the server (no embedded sync)
Plugin trinity -- Ships /recall-context + /memory-commit skills and SessionStart + opt-in PostToolUse hooks (see docs/ARCHITECTURE.md)
Proactive memory -- Tool descriptions and skills guide AI to save preferences, decisions, facts at the right moment
LLM compression -- Per-turn compression through the [models.chat] provider cell targets ~3x token reduction at >=0.9 fact retention; graceful skip when the cell is unconfigured (see docs/compression.md)
Temporal knowledge graph -- Bitemporal columns (valid_from / valid_to / superseded_by) on every memory + entity-resolution dedup (embedding KNN at default 0.85 cosine threshold) + audit trail (memory_audit table with prev/new state hashes) + new actions (entity_search / entity_graph / history / as_of) + opt-in KG_AUTO_ENABLED auto-extract on capture. BREAKING for clients that called memory.get expecting historical-inclusive results: pass as_of for time-travel; default now filters to current-state (valid_to IS NULL).

Quick install

# Method 1: Claude Code plugin (skills + hooks; connects to a running

mnemo HTTP instance -- start one per "Self-hosting" below)

/plugin marketplace add n24q02m/claude-plugins /plugin install mnemo@n24q02m-plugins

Method 2: run the HTTP server yourself and register the endpoint

uvx n24q02m-mnemo # serves http://127.0.0.1:8000/mcp by default claude mcp add --transport http mnemo http://127.0.0.1:8000/mcp

Method 3 (remote): point a client at an existing HTTP deployment

claude mcp add --transport http mnemo https:// /mcp

Install matrix (the server speaks Streamable HTTP only — there is no stdio transport post-de-host; see the Setup page for full steps):

Client	Install
Claude Code (plugin)	`/plugin marketplace add n24q02m/claude-plugins` then `/plugin install mnemo@n24q02m-plugins` (requires a running instance; see Self-hosting)
Claude Code (HTTP)	start the server (`uvx n24q02m-mnemo` or docker compose), then `claude mcp add --transport http mnemo http://127.0.0.1:8000/mcp`
Codex / Gemini CLI / Cursor / Windsurf	start the server, then register the `http:// : /mcp` HTTP endpoint in the client's MCP settings
Any MCP client	point it at the `/mcp` endpoint of a running instance (Streamable HTTP)

With auth = "token" or "multi" configured in mnemo-config/config.toml, send the token as a Bearer credential (--header "Authorization: Bearer " or the client's equivalent).

Comparison vs. peers

Feature	mnemo	Mem0	Letta	OpenMemory
Hybrid retrieval (FTS + vec)	yes (FTS5 + RRF + sqlite-vec)	yes	partial	yes
Cross-encoder rerank	yes (Fastretrieval Qwen3 local + `[models.rerank]` cell)	partial (Cohere only)	no	no
Temporal decay scoring	yes (exp half-life)	no	no	no
Importance boost in rank	yes (LLM 0.0-1.0)	no	no	no
Soft-archive + restore policy	yes (importance x recency)	no	no	no
Self-hostable (single SQLite file)	yes (zero ext deps)	partial (cloud-first)	yes (Postgres)	yes (Postgres + Qdrant)
LLM dispatch	yes (`[models.chat]` cell, any OpenAI-spec endpoint)	partial	yes	partial
Plugin trinity (skills + hooks)	yes (recall-context + memory-commit)	n/a	n/a	n/a
Cross-machine migration	yes (rclone backup/restore outside the server)	yes (cloud)	n/a	n/a
LLM compression on capture	yes ([models.chat] cell, ~3x at >=0.90 retention)	no	no	no
Bitemporal `valid_from` / `valid_to` queries	yes (`as_of` time-travel)	no	partial (events only)	no
Entity resolution via embedding KNN	yes (cosine threshold tunable)	no	no	no
Audit trail with state hashes	yes (`memory_audit` table)	no	no	no

Status

2026-09 -- De-host update

The Cloudflare D1/Vectori

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

Mnemo

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 Search & AI memoryi

Common questions

Alternatives

Context7

Codebase Memory

Exa

README from the maker

Mnemo MCP Server

Table of contents

Roadmap (current = Phase 3 / v2.x)

Features

Quick install

mnemo HTTP instance -- start one per "Self-hosting" below)

Method 2: run the HTTP server yourself and register the endpoint

Method 3 (remote): point a client at an existing HTTP deployment

Comparison vs. peers

Status