Yggdrasil Memory MCP Server

by vondervuflyaio.github.VonderVuflya/yggdrasilv0.15.0

Local-first memory for AI coding agents on SQLite/FTS5, curated and semantically de-duplicated, with data stored as plain rows you own.

22Pythonstdioofficial registry

context tax

queued

security

queued

cold start

queued

freshness

Maintained2mo ago

Install Yggdrasil Memory MCP server

claude mcp add yggdrasil-memory -e YGG_ENGINE_TOKEN='<ygg-engine-token>' -- uvx yggdrasil-memory mcp

{
  "mcpServers": {
    "yggdrasil-memory": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory",
        "mcp"
      ],
      "env": {
        "YGG_ENGINE_TOKEN": "<ygg-engine-token>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "yggdrasil-memory": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory",
        "mcp"
      ],
      "env": {
        "YGG_ENGINE_TOKEN": "<ygg-engine-token>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "yggdrasil-memory": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "yggdrasil-memory",
        "mcp"
      ],
      "env": {
        "YGG_ENGINE_TOKEN": "<ygg-engine-token>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "yggdrasil-memory": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory",
        "mcp"
      ],
      "env": {
        "YGG_ENGINE_TOKEN": "<ygg-engine-token>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
YGG_ENGINE_URL	—	—	Base URL of the Yggdrasil engine HTTP API.
YGG_ENGINE_TOKEN	—	yes	Bearer token for authenticating to the Yggdrasil engine (from ~/.yggdrasil/token after `ygg install`).

Freshness

Maintained — last maintenance signal 2mo ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-08-06 · 2mo ago · GitHub
Latest release
2026-08-06 · 2mo ago · GitHub · v0.15.0
Package published
no data · npm/PyPI
Registry entry updated
2026-08-06 · 2mo ago · official registry · v0.15.0

FAQ

›How do I install the Yggdrasil Memory MCP server in Claude Code?

Run: claude mcp add yggdrasil-memory -e YGG_ENGINE_TOKEN='<ygg-engine-token>' -- uvx yggdrasil-memory mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Yggdrasil Memory require an API key?

Yes. It expects YGG_ENGINE_TOKEN, of which 1 is a secret.

›Can I use Yggdrasil Memory as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Yggdrasil Memory in the official MCP registry?

Yes, as io.github.VonderVuflya/yggdrasil.