mnemo-mcp

# Mnemo MCP Server

mcp-name: io.github.n24q02m/mnemo-mcp

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

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<details>
  <summary><strong>Sister projects from n24q02m</strong> (click to expand)</summary>

| Project | Tagline | Tag |
|---|---|---|
| [agent-chat-plugin](https://github.com/n24q02m/agent-chat-plugin) | Peer AI agents chat in a shared folder — no human relay, no orchestrator, wor... | Tooling |
| [better-code-review-graph](https://github.com/n24q02m/better-code-review-graph) | Knowledge graph for token-efficient code reviews -- semantic search and call-... | MCP |
| [better-drive](https://github.com/n24q02m/better-drive) | 2-way Google Drive sync with .driveignore filter — rclone engine, Windows tray | Tooling |
| [better-email-mcp](https://github.com/n24q02m/better-email-mcp) | IMAP/SMTP email for AI agents -- read, send, organize folders, and manage att... | MCP |
| [better-godot-mcp](https://github.com/n24q02m/better-godot-mcp) | Composite MCP server for Godot Engine -- 17 composite tools for AI-assisted g... | MCP |
| [better-notion-mcp](https://github.com/n24q02m/better-notion-mcp) | Markdown-first Notion for AI agents -- pages, databases, blocks, and comments... | MCP |
| [better-semantic-release](https://github.com/n24q02m/better-semantic-release) | Drop-in python-semantic-release fork with built-in release-safety guards (orp... | Tooling |
| [better-telegram-mcp](https://github.com/n24q02m/better-telegram-mcp) | Telegram for AI agents -- messages, chats, media, and contacts across both bo... | MCP |
| [better-workspace-mcp](https://github.com/n24q02m/better-workspace-mcp) | Google Workspace MCP server (Docs/Drive/Calendar/Gmail/Sheets/Slides/Tasks/Ch... | MCP |
| [claude-plugins](https://github.com/n24q02m/claude-plugins) | Claude Code plugin marketplace for the n24q02m MCP servers -- install web sea... | Marketplace |
| [imagine-mcp](https://github.com/n24q02m/imagine-mcp) | Image and video understanding + generation for AI agents -- across Gemini, Op... | MCP |
| [jules-task-archiver](https://github.com/n24q02m/jules-task-archiver) | Chrome Extension for bulk operations on Jules tasks via batchexecute API -- a... | Tooling |
| [mcp-core](https://github.com/n24q02m/mcp-core) | Shared foundation for building MCP servers -- Streamable HTTP transport, OAut... | MCP |
| [mnemo-mcp](https://github.com/n24q02m/mnemo-mcp) | Persistent AI memory with hybrid search and embedded sync. Open, free, unlimi... | MCP |
| [fastretrieval](https://github.com/n24q02m/fastretrieval) | Multi-model retrieval runtime for ONNX/GGUF embeddings and reranking | Library |
| [skret](https://github.com/n24q02m/skret) | Secrets without the server. | CLI |
| [tacet](https://github.com/n24q02m/tacet) | A self-distilling neuro-symbolic cascade that amortises LLM cost across knowl... | Tooling |
| [web-core](https://github.com/n24q02m/web-core) | Shared web infrastructure package for search, scraping, HTTP security, and st... | Library |
| [wet-mcp](https://github.com/n24q02m/wet-mcp) | Open-source MCP server for AI agents: web search, content extraction, and lib... | MCP |

</details>
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## Table of contents

- [Features](#features)
- [Status](#status)
- [Documentation](#documentation)
- [Smithery](#smithery)
- [Tools](#tools)
- [Security](#security)
- [Build from Source](#build-from-source)
- [CLI](#cli)
- [Remote (HTTP mode)](#remote-http-mode)
- [Deploy to Cloudflare](#deploy-to-cloudflare)
- [Trust Model](#trust-model)
- [License](#license)



<a href="https://glama.ai/mcp/servers/n24q02m/mnemo-mcp">
  <img width="380" height="200" src="https://glama.ai/mcp/servers/n24q02m/mnemo-mcp/badge" alt="Mnemo MCP server" />
</a>

## Roadmap (current = Phase 3 / v2.x)

| 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 -- plugin trinity (recall-context + memory-commit skills, SessionStart + opt-in PostToolUse hooks) |
| **Phase 2** | v1.x+1 | **Shipped** | LLM-driven compression of older memories + Passport sync (encrypted import/export bundle for cross-machine bootstrap) -- AES-256-GCM + Argon2id, S3 / R2 / B2 / MinIO + GDrive backends, delta-sync with LWW per row |
| **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-aware passport bundle sections -- `KG_AUTO_ENABLED` opt-in auto-extract on capture |

## Features

- **Hybrid retrieval** -- FTS5 + vector search (sqlite-vec locally, Vectorize on Cloudflare), fused via Reciprocal Rank Fusion (k=60), then re-ranked by a configurable rerank chain (`RERANK_MODELS`, order = litellm fallback; empty -> Fastretrieval's local Qwen3 reranker) with temporal decay and importance boost
- **Typed capture** -- `memory(action="capture")` with 6 context_types (`conversation`/`fact`/`preference`/`skill`/`task`/`decision`), embedding-based dedup, and a configurable LLM chain (`LLM_MODELS`, order = litellm fallback)
- **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 providers (Jina AI, Gemini, OpenAI, Cohere)
- **Multi-machine sync** -- JSONL-based merge sync via Google Drive (bundled Desktop OAuth public client)
- **Plugin trinity** -- Ships `/recall-context` + `/memory-commit` skills and SessionStart + opt-in PostToolUse hooks (see [docs/ARCHITECTURE.md](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 via the multi-provider dispatcher targets ~3x token reduction at >=0.9 fact retention; graceful skip when no provider configured (see [docs/compression.md](docs/compression.md))
- **Encrypted passport sync** -- AES-256-GCM bundles + Argon2id KDF, S3 (R2 / B2 / MinIO) and Google Drive backends, delta-sync with last-write-wins per row (see [docs/passport.md](docs/passport.md)). Bootstrap via the `passport-bootstrap` skill.
- **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`) + 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`).

## Comparison vs. peers

| Feature | mnemo-mcp | Mem0 | Letta | OpenMemory |
|---|---|---|---|---|
| Hybrid retrieval (FTS + vec) | yes (FTS5 + RRF; sqlite-vec local / Vectorize on Cloudflare) | yes | partial | yes |
| Cross-encoder rerank chain | yes (Fastretrieval Qwen3 local + Jina + Cohere) | 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) |
| Multi-provider LLM dispatch | yes (`LLM_MODELS` chain, any litellm provider) | partial | yes | partial |
| Plugin trinity (skills + hooks) | yes (recall-context + memory-commit) | n/a | n/a | n/a |
| Multi-machine sync | yes (GDrive bundled OAuth) | yes (cloud) | n/a | n/a |
| E2E-encrypted passport sync | yes (AES-256-GCM + Argon2id, S3 + GDrive) | no | no | no |
| LLM compression on capture | yes (multi-provider, ~3x at >=0.90 retention) | no | no | no |
| Backend-pluggable sync architecture | yes (S3 / R2 / B2 / MinIO + GDrive) | no | no | no