Koskamo

Yggdrasil MCP

Yggdrasil is a local-first, zero-dependency memory server for AI coding agents over the Model Context Protocol. It enables agents to share durable state across sessions and tools like Claude Code and Codex, using SQLite and Markdown for data storage without requiring external API keys or cloud services.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Yggdrasil MCP logo, by VonderVuflyaCommunity listingLocal stdioSource reviewed; not executedPublished by VonderVuflya
Vendor documentation

What you can do with it

  • Recall project decisions across new AI sessions
  • Share memory between Claude Code and Codex
  • Store semantic lessons from debugging
  • Maintain local-first agent memory

Source and maintenance

Community listingRegistry 0.16.0
mcp-registry: io.github.VonderVuflya/yggdrasil@0.16.0Source repositoryProject website
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

yggdrasil-memory 0.16.0

pypiuvx
yggdrasil-memory package definition
{
  "version": "0.16.0",
  "transport": "stdio",
  "identifier": "yggdrasil-memory",
  "runtimeHint": "uvx",
  "registryType": "pypi",
  "packageArguments": [
    {
      "type": "positional",
      "value": "mcp",
      "valueHint": "subcommand"
    }
  ],
  "environmentVariables": [
    {
      "name": "YGG_ENGINE_URL",
      "format": "string",
      "default": "http://127.0.0.1:42069",
      "description": "Base URL of the Yggdrasil engine HTTP API."
    },
    {
      "name": "YGG_ENGINE_TOKEN",
      "format": "string",
      "description": "Bearer token for authenticating to the Yggdrasil engine (from ~/.yggdrasil/token after `ygg install`)."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "yggdrasil-mcp": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory==0.16.0",
        "mcp"
      ],
      "env": {
        "YGG_ENGINE_URL": "<YOUR_YGG_ENGINE_URL>",
        "YGG_ENGINE_TOKEN": "<YOUR_YGG_ENGINE_TOKEN>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "yggdrasil-mcp": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory==0.16.0",
        "mcp"
      ],
      "env": {
        "YGG_ENGINE_URL": "<YOUR_YGG_ENGINE_URL>",
        "YGG_ENGINE_TOKEN": "<YOUR_YGG_ENGINE_TOKEN>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "yggdrasil-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "yggdrasil-memory==0.16.0",
        "mcp"
      ],
      "env": {
        "YGG_ENGINE_URL": "<YOUR_YGG_ENGINE_URL>",
        "YGG_ENGINE_TOKEN": "<YOUR_YGG_ENGINE_TOKEN>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "yggdrasil-mcp": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory==0.16.0",
        "mcp"
      ],
      "env": {
        "YGG_ENGINE_URL": "<YOUR_YGG_ENGINE_URL>",
        "YGG_ENGINE_TOKEN": "<YOUR_YGG_ENGINE_TOKEN>"
      }
    }
  }
}

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