Yggdrasil MCP server
io.github.VonderVuflya/yggdrasil·v0.16.0·21 starsOne shared, durable memory for your AI coding agents — local-first, zero-dependency.
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Yggdrasil tools
No tool declarations could be read from the package source. They show once the server is installed.
How Yggdrasil compares
Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.
- Safety score
- 83/100
- higher than 65% of 48,255 servers
- GitHub stars
- 21
- more than 91% of 28,688 servers
Release history: 2 versions in the registry since 2026-08-06, latest 2026-10-22, typically one every 77 days.
Install Yggdrasil in Claude Code, Cursor or VS Code
claude mcp add yggdrasil -- uvx yggdrasil-memory
What the publisher says
From the Yggdrasil repository's README, as published. We do not edit it. Read it on GitHub
<!-- mcp-name: io.github.VonderVuflya/yggdrasil --> 🌳 Yggdrasil
Stop re-explaining your project to every new AI session. One local memory for Claude Code, Codex, and every MCP agent — shared across sessions, tools, and projects. Zero dependencies. Nothing leaves your machine.
Install · How it works · Numbers · Compare · FAQ
Read this in: Русский · 简体中文 · Español · Français · 日本語 · Deutsch
Every new chat, your AI forgets. You re-explain the project, the decisions, the gotchas — every time, in every tool. Yggdrasil is a tiny always-on memory that any agent plugs into. Open a new session, in any project, with any AI, and it already knows what you decided, what broke, and what's still open.
$ cd ~/projects/checkout-api && claude # a brand-new session
🌳 Yggdrasil (injected automatically at session start)
• [project_status] payments refactor: idempotency keys added; open: e2e tests
• [lesson] webhook 401 → signing secret rotated; update env + redeploy
> "have I solved a flaky websocket reconnect anywhere before?"
🌳 recall → found in project `realtime-dash`:
refresh the token *before* opening the socket, then retry with capped backoff.No "let me remind you what we did yesterday." It's just there.
🚀 Install
Two commands, inside Claude Code (the plugin launches via uv):
/plugin marketplace add VonderVuflya/Yggdrasil
/plugin install yggdrasilThe engine lazy-starts on first use and generates its own local token — no API key, no cloud, nothing to configure. Codex and Cursor use the same flow.
All other channels — CLI daemon, Homebrew, npm, Claude Desktop, from source…
Shortened. The full README is on GitHub.
Nothing above is checked by us. What we check is on the safety report.
Yggdrasil: common questions
- Is Yggdrasil MCP server safe?
- Mostly: it is graded B (83/100). Read the Yggdrasil safety report
- How do I install Yggdrasil?
- It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
- Does Yggdrasil need an API key?
- Yes. The registry entry asks for
YGG_ENGINE_TOKEN. - Is Yggdrasil maintained?
- The last commit was 61 days ago (2026-09-03). The latest release is v0.16.0.
- What can I use instead of Yggdrasil?
- Servers from other publishers that do the same job: Deja Vu MCP server, Concord MCP server and Memorix MCP server. Compare all Yggdrasil alternatives.
- How does Yggdrasil compare with other MCP servers?
- safety score 83/100 (higher than 65% of 48,255 servers); github stars 21 (more than 91% of 28,688 servers). Full comparison.
Alternatives to Yggdrasil
Same job from other publishers: the closest match first, then the best rated.
- Deja Vudeja-vu: local memory over the session histories of forty-three coding agents.not reviewedEstablishedA
- Concord MCPCross-harness communication and shared work-state for AI coding agents.not reviewedEstablishedA
MemorixLocal-first project memory with legacy MCP and 2026 discovery compatibility.not reviewedEstablishedB- ClaudexorRoute coding work across Claude Code, Codex, Cursor, and OpenCode with shared context.not reviewedEstablishedA
- Nautilus Compass MemoryLocal-first long-term memory for AI agents, with byte-recomputable signed verification receipts.not reviewedEstablishedB