Yggdrasil MCP Server

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.

People connecting memory tools to Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-08-19 · ★ 21 · #53 OF 259 MAINTAINED MEMORY · VERIFIED 2026-08-25

AGPL-3.0 · Python servers · how we verify → /methodology

01 · Install Yggdrasil

before you install - you'll need

The README does not document required environment variables for a basic install.

Claude Code

claude mcp add vondervuflya-yggdrasil -- uvx yggdrasil-memory

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "vondervuflya-yggdrasil": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license AGPL-3.0 - declared in the repository

pypi package yggdrasil-memory - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.VonderVuflya is GitHub-verified and matches the repo owner

03 · What Yggdrasil can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.15.0 · 2026-08-06

Added · Reasoning-aware distillation. distill_reasoning=auto suppresses internal · reasoning on models known to support it, avoiding long <think> traces that · do not improve extracted lessons. Set it to on or off to…

v0.14.0 · 2026-08-06

ygg install assumed Ollama and then asked you to type a model name from · memory. If you ran LM Studio you had to work out three things nobody told you: · that embed_backend has to be openai, that embed_url wants the…

v0.13.2 · 2026-07-17

Fixed · Arrow keys no longer quit the setup wizard - 0.13.0's ygg install broke on · the first ↓. Reinstall or ygg update if you hit it. · ctrl-c leaves the wizard cleanly instead of printing a traceback.

04 · Who maintains Yggdrasil

yggdrasil is maintained by vondervuflya. It's the only MCP server we track from this author; the repo dates to Jun 2026.

05 · Facts

repository: github.com/vondervuflya/yggdrasil
website: https://github.com/VonderVuflya/yggdrasil
category: memory - ranked #53 of 259 actively-maintained memory servers as of 2026-08-25.
release cadence: 10+ releases in the last 90 days (latest 2026-08-06)
registry: io.github.VonderVuflya/yggdrasil (active, first published 2026-06-19 · 24 versions)
packages: pypi:yggdrasil-memory

06 · Yggdrasil FAQ

What is Yggdrasil?

Is Yggdrasil still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-19 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

How do I install Yggdrasil?

Run `uvx yggdrasil-memory`. The README does not document required environment variables for a basic install. You can also paste the ready-made client config above.

Does Yggdrasil run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Yggdrasil

Alternatives to Yggdrasil

Maintained memory servers if Yggdrasil isn't the fit.

Pairs well with

Servers that cover what Yggdrasil doesn't - only shown when the pairing reason fits the companion.

More memory MCP servers · Midas · Emem, The Verifiable Memory Protocol For The Physical World · AI Context Flow · Aifp MCP · Cogmem

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