Mnemon

mnemon

[](https://github.com/nousergon/mnemon/issues) [](https://www.python.org/downloads/) [](LICENSE) [](https://modelcontextprotocol.io) [](https://pypi.org/project/mnemon-memory/) [](https://github.com/nousergon/mnemon/actions/workflows/ci.yml)

One memory vault. Every MCP client. Self-hosted.

**Status:** alpha — interfaces may change. [Issues](https://github.com/nousergon/mnemon/issues) and PRs welcome.

Claude Code, Cursor, claude.ai web/mobile/desktop, Claude Desktop, Gemini CLI — one vault shared across all of them.

mnemon is a [Model Context Protocol](https://modelcontextprotocol.io) server with hybrid BM25 + vector search. Your data stays on your machine or your own Fly app.

**Platforms:** Tested on macOS 14+. Linux should work. Windows untested.

Two product lanes: local and web

Capability	mnemon local	mnemon web
Claude Code (CLI)	✅	✅
Claude Desktop (Mac/Win app)	✅	✅
Cursor	✅	✅
Gemini CLI	✅	✅
Any local MCP client	✅	✅
claude.ai (web)	❌	✅
Claude mobile app	❌	✅
Memory shared across laptop + desktop	❌	✅
Durable off-machine backup	❌ (manual file copy)	✅ (S3)
External accounts required	none	Fly.io + AWS
Credit card required	no	yes (both free tiers)
First-install setup time	~2 min	~15 min
Ongoing cost	$0	~$0 on free tiers
Cold-start latency after idle	none	2–5s

• mnemon local — one machine, one or more MCP clients. Zero external accounts. pip install mnemon-memory && mnemon setup.
• mnemon web — memory across d