yggdrasil

yggdrasil is an MCP server for Claude Code from henrychong-ai/yggdrasil-mcp. Its token cost is not measured, scanned A, original, MIT.

An MCP server for exploring multiple lines of reasoning and comparing them with several agents. Tree of Thoughts is a method that branches possible solutions before selecting one.

In plain words
What is it for?
Use it for reasoning orchestration, alternative-solution analysis, and multi-agent evaluation.
Why use it?
It helps handle problems where a single straight-line reasoning path may miss better options.

MCP server for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: listed in a Claude config.

Part of the yggdrasil-mcp plugin — 1 MCP server shipped together

Good fit Use it for reasoning orchestration, alternative-solution analysis, and multi-agent evaluation.

Compare 6 mcp servers from other repositories ↓
Install with agentmods
npx agentmods add mcp/henrychong-ai/yggdrasil-mcp/yggdrasil
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/henrychong-ai/yggdrasil-mcp

Made for: Claude Code.

Or install yggdrasil-mcp, the plugin that ships this one along with the rest of its 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for yggdrasil

README.md
[![agentmods](https://agentmods.dev/badge/mcp/henrychong-ai/yggdrasil-mcp/yggdrasil/github.svg)](https://agentmods.dev/mcp/henrychong-ai/yggdrasil-mcp/yggdrasil)
Your own site
<a href="https://agentmods.dev/mcp/henrychong-ai/yggdrasil-mcp/yggdrasil"><img src="https://agentmods.dev/badge/mcp/henrychong-ai/yggdrasil-mcp/yggdrasil/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for yggdrasil

Your own site · 80×15
<a href="https://agentmods.dev/mcp/henrychong-ai/yggdrasil-mcp/yggdrasil"><img src="https://agentmods.dev/badge/mcp/henrychong-ai/yggdrasil-mcp/yggdrasil.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

yggdrasil scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

cowork-plugin/.mcp.json · 9 lines

What it actually says

{
  "yggdrasil": {
    "command": "npx",
    "args": [
      "-y",
      "yggdrasil-mcp"
    ]
  }
}
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 9 lines scan A daacffecd7f0

Subscribe to this mod's changes

yggdrasil is an MCP server published in the GitHub repository henrychong-ai/yggdrasil-mcp (3 stars, last pushed yesterday), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.