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Persistent AI memory with hybrid search and embedded sync. Open, free, unlimited.
mcp-name: io.github.n24q02m/mnemo-mcp
Persistent memory MCP server with hybrid retrieval (FTS5 + sqlite-vec + RRF fusion + cross-encoder rerank + temporal decay) and embedded sync. Open, free, unlimited.
| Project | Tagline | Tag |
|---|---|---|
| better-code-review-graph | Knowledge graph for token-efficient code reviews -- fixed search, configurabl... | MCP |
| better-email-mcp | IMAP/SMTP email server for AI agents -- 6 composite tools with multi-account ... | MCP |
| better-godot-mcp | Composite MCP server for Godot Engine -- 17 mega-tools for AI-assisted game d... | MCP |
| better-notion-mcp | Markdown-first Notion API server for AI agents -- 10 composite tools replacin... | MCP |
| better-telegram-mcp | MCP server for Telegram with dual-mode support: Bot API (httpx) for quick bot... | MCP |
| claude-plugins | Full documentation: mcp.n24q02m.com — unified docs for all 8 servers + the mc... | Marketplace |
| imagine-mcp | Production-grade MCP server for image and video understanding + generation ac... | MCP |
| jules-task-archiver | Chrome Extension for bulk operations on Jules tasks via batchexecute API -- a... | Tooling |
| mcp-core | Unified MCP Streamable HTTP 2025-11-25 transport, OAuth 2.1 Authorization Ser... | MCP |
| mnemo-mcp | Persistent AI memory with hybrid search and embedded sync. Open, free, unlimi... | MCP |
| qwen3-embed | Lightweight Qwen3 text embedding and reranking via ONNX Runtime and GGUF | Library |
| skret | Secrets without the server. | CLI |
| web-core | Shared web infrastructure package for search, scraping, HTTP security, and st... | Library |
| wet-mcp | Open-source MCP Server for web search, content extraction, library docs & mul... | MCP |
| 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 |
memory(action="capture") with 6 context_types (conversation/fact/preference/skill/task/decision), embedding-based dedup, and a multi-provider LLM dispatcher (Gemini > OpenAI > Anthropic > xAI)recency_factor * (1 - importance) > 1.0; restore action available/recall-context + /memory-commit skills and SessionStart + opt-in PostToolUse hooks (see docs/ARCHITECTURE.md)passport-bootstrap skill.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).| Feature | mnemo-mcp | Mem0 | Letta | OpenMemory |
|---|---|---|---|---|
| Hybrid retrieval (FTS + vec) | yes (FTS5 + sqlite-vec + RRF) | yes | partial | yes |
| Cross-encoder rerank chain | yes (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 (Gemini/OpenAI/Anthropic/xAI auto-detect) | 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 |
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 |
2026-05-02 -- Architecture stabilization update
Past months saw significant churn around credential handling and the daemon-bridge auto-spawn pattern. This caused multi-process races, browser tab spam, and inconsistent setup UX across plugins. As of v, the architecture is stable: 2 clean modes (stdio + HTTP), no daemon-bridge layer, no auto-spawn from stdio.
Apologies for the instability period. If you encountered issues with prior versions, please update to v+ and follow the current setup docs -- most prior workarounds are no longer needed.
Related plugins from the same author:
- wet-mcp -- Web search + content extraction
- imagine-mcp -- Image/video understanding + generation
- better-notion-mcp -- Notion API
- better-email-mcp -- Email management
- better-telegram-mcp -- Telegram
- better-godot-mcp -- Godot Engine
- better-code-review-graph -- Code review knowledge graph
All plugins share the same architecture -- install once, learn pattern transfers.
Full docs at mcp.n24q02m.com/servers/mnemo-mcp/:
Install with AI agent -- paste this to your AI coding agent:
Install MCP server
mnemo-mcpfollowing the steps at https://raw.githubusercontent.com/n24q02m/claude-plugins/main/plugins/mnemo-mcp/setup-with-agent.md
3 MCP tools, 17 memory actions:
| Tool | Actions | Description |
|---|---|---|
memory | add, capture, search, list, update, delete, export, import, stats, restore, archived, archive_now, consolidate, compress, entity_search, entity_graph, history | Core CRUD + typed capture (6 context_types) + hybrid search (RRF + rerank + temporal decay) + import/export + soft-archive + restore + on-demand archive sweep + LLM consolidation + LLM compression + temporal KG (entity search / graph / history) |
config | status, sync, set, warmup, setup_sync, setup_status, setup_start, setup_skip, setup_reset, setup_complete, setup_relay, sync_now, export_passport, import_passport | Server status, trigger sync, update settings, pre-download embedding model, authenticate sync provider, manage HTTP setup form lifecycle, passport export/import |
help | topic="memory" or topic="config" | Full documentation for any tool |
Plugin trinity (Claude Code marketplace install):
| Component | Trigger | Purpose |
|---|---|---|
mnemo:recall-context skill | session start, before significant decisions, "what do I know about X?" | Pulls cwd / topic-relevant memories with context_type filtering |
mnemo:memory-commit skill | "remember this" / "save this" / "ghi nho" / "luu lai" | Typed manual capture with context_type decision tree |
mnemo:knowledge-audit skill | periodic / "audit memory" | Find duplicates, contradictions, stale entries; consolidate |
mnemo:session-handoff skill | end of session | Capture decisions / preferences / corrections / conventions / open questions |
| SessionStart hook | every session init | Non-blocking nudge to invoke recall-context |
| PostToolUse hook (opt-in) | CAPTURE_AUTO_ENABLED=true | Hint memory-commit after Write/Edit of CLAUDE.md / AGENTS.md / ARCHITECTURE.md / docs/*.md |
| URI | Description |
|---|---|
mnemo://stats | Database statistics and server status |
| Prompt | Parameters | Description |
|---|---|---|
save_summary | summary | Generate prompt to save a conversation summary as memory |
recall_context | topic | Generate prompt to recall relevant memories about a topic |
~/.mnemo-mcp/tokens/ with 600 permissionsgit clone https://github.com/n24q02m/mnemo-mcp.git
cd mnemo-mcp
uv sync
uv run mnemo-mcp
This plugin implements TC-Local (machine-bound, single trust principal). See mcp-core/docs/TRUST-MODEL.md for full classification.
| Mode | Storage | Encryption | Who can read your data? |
|---|---|---|---|
| stdio (default) | ~/.mnemo-mcp/config.json | AES-GCM, machine-bound key | Only your OS user (file perm 0600) |
| HTTP self-host | Same as stdio | Same | Only you (admin = user) |
MIT -- See LICENSE.
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