Vrm Toolkit MCP

Name: Vrm Toolkit MCP
Author: dwarehouse1

by dwarehouse1version 0.1.1i★ –iRuns on your computer

Registry nameio.github.dwarehouse1/vrm-toolkit-mcp

Install

Overview

Description from the maker (original English)

Inspect, validate and preview VRM / VRMA files from an AI agent (5 tools, local stdio server).

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: VRM_TOOLKIT_CHROME

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "vrm-toolkit": {
      "command": "npx",
      "args": [
        "-y",
        "vrm-toolkit-mcp"
      ],
      "env": {
        "VRM_TOOLKIT_CHROME": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add vrm-toolkit --env VRM_TOOLKIT_CHROME=your-value -- npx -y vrm-toolkit-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "vrm-toolkit": {
      "command": "npx",
      "args": [
        "-y",
        "vrm-toolkit-mcp"
      ],
      "env": {
        "VRM_TOOLKIT_CHROME": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "vrm-toolkit": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "vrm-toolkit-mcp"
      ],
      "env": {
        "VRM_TOOLKIT_CHROME": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

VRM_TOOLKIT_CHROME env
Optional path to a Chromium-based browser executable for the rendering tools

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account dwarehouse1, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 32718 servers in this category
Published to the registry more recently than 21% of the other 32718 servers in this category
Basic checks equal to or better than 100% of the other 32718 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Vrm Toolkit MCP safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.1) reached the registry 3 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, MemberVault MCP by usefulapi

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

vrm-toolkit-mcp

v0.1.1 — [npm](https://www.npmjs.com/package/vrm-toolkit-mcp) / [GitHub](https://github.com/dwarehouse1/vrm-toolkit-mcp)

An MCP (Model Context Protocol) server that lets an AI agent inspect, validate and preview VRM / VRMA files on your machine. Five tools, stdio transport, no network access at runtime.

VRM / VRMAファイルの検品・情報抽出・プレビューをAIエージェントから使えるようにする MCPサーバーです。ツールは5本、stdioトランスポート、実行時のネットワークアクセスなし。

Tools / ツール

Tool	What it does	説明
`vrm_inspect`	Structured JSON: meta (name/author/license and permission fields), humanoid bone map, expressions, polygon/texture statistics	メタ(名前/作者/ライセンス許諾)・ボーン・表情・ポリゴン/テクスチャ規模を構造化出力
`vrm_validate`	Finding list: missing required humanoid bones, broken node references, missing meta/license fields, unknown required extensions, configurable size/triangle/texture budgets	humanoidマッピング欠落・参照切れ・メタ/ライセンス欠落・未知の必須拡張・サイズ超過などの検品リスト
`vrma_inspect`	Tracks, targeted humanoid bones, expression tracks, duration, estimated frame rate	トラック・対象ボーン・表情トラック・尺・フレームレート推定
`vrma_preview`	Applies a VRMA to a VRM and renders a PNG still or a short WebM clip (max 10 s) through local headless Chrome/Edge	VRMAをVRMに適用し、ローカルのヘッドレスChrome/EdgeでPNG静止画または短尺WebM動画を書き出し
`vrm_snapshot`	Renders a rest-pose PNG with optional expression weights and view presets (front / three-quarter / side / face close-up)	表情ウェイトとビュープリセット(正面/斜め/側面/顔アップ)を指定できる静止画スクリーンショット

Structural tools (vrm_inspect, vrm_validate, vrma_inspect) parse the GLB/glTF container directly in Node and need no browser. Rendering tools (vrma_preview, vrm_snapshot) use an already-installed Chromium-based browser via puppeteer-core; nothing is downloaded.

構造系3ツールはNode単体でGLB/glTFを直接パースし、ブラウザ不要。描画系2ツールはインストール済みのChromium系ブラウザをpuppeteer-coreで使います(追加ダウンロードなし)。

Supported inputs: VRM 0.x (extensions.VRM), VRM 1.0 (extensions.VRMC_vrm), VRMA (extensions.VRMC_vrm_animation), GLB container or plain glTF JSON.

Requirements / 動作条件

Node.js 20+
For vrma_preview / vrm_snapshot: a local Chrome or Edge (auto-detected; override with the VRM_TOOLKIT_CHROME environment variable)
Input size budget: 512 MiB by default (VRM_TOOLKIT_MAX_BYTES to override)

Setup / セットアップ

claude mcp add vrm-toolkit -- npx -y vrm-toolkit-mcp

Other MCP hosts / その他のMCPホスト: command npx, args ["-y", "vrm-toolkit-mcp"] (stdio).

From source / ソースから:

npm install

npm run build claude mcp add vrm-toolkit -- node /absolute/path/to/vrm-toolkit/dist/main.js

Execution examples / 実行例

Real outputs from the local test run (2026-08-05, file paths shortened). ローカルテスト実行(2026-08-05)の実出力です(パスは短縮表記)。

vrm_inspect

Input: a VRoid Studio-exported VRM 1.0 avatar (15.7 MB).

"file": { "path": "...\\V1.vrm", "bytes": 15737992, "container": "glb" }, "vrm": { "specFamily": "vrm1", "specVersion": "1.0" }, "meta": { "name": "V1", "authors": ["D"], "licenseUrl": "https://vrm.dev/licenses/1.0/", "avatarPermission": "onlyAuthor", "commercialUsage": "corporation", "creditNotation": "required", "allowRedistribution": false, "modification": "prohibited" }, "humanoid": { "mappedBoneCount": 54, "bones": [ { "bone": "hips", "node": 1, "nodeName": "J_Bip_C_Hips" }, { "bone": "spine", "node": 34, "nodeName": "J_Bip_C_Spine" } ], "missingRequiredBones": [] }, "expressions": { "presetCount": 14, "presets": ["happy", "angry", "sad", "..."] }, "geometry": { "meshCount": 3, "totalVertices": 103489, "totalTriangles": 33484, "perMesh": [ { "name": "Face (merged)", "vertices": 33640, "triangles": 7308 }, { "name": "Body (merged)", "vertices": 57128, "triangles": 11548 }, { "name": "Hair001 (merged)", "vertices": 12721, "triangles": 14628 } ] }, "textures": { "imageCount": 26, "totalImageBytes": 8033934, "maxDimension": 2048 }, "materials": { "materialCount": 17 } }

(Output truncated for readability; the tool returns the full bone and image lists.)

vrma_inspect

"file": { "path": "...\\motion-walk-forward.vrma", "bytes": 3268, "container": "glb" }, "vrma": { "specVersion": "1.0" }, "humanoid": { "mappedBoneCount": 16, "bones": ["hips", "spine", "chest", "head", "..."] }, "animation": { "animationCount": 1, "channelCount": 2, "channelsByPath": { "translation": 1, "rotation": 1, "scale": 0, "weights": 0 }, "totalKeyframes": 62, "durationSec": 1.25, "fpsEstimate": 24, "frameCountEstimate": 31, "humanoidBoneTracks": [ { "bone": "hips", "paths": ["translation"] }, { "bone": "chest", "paths": ["rotation"] } ] } }

vrm_validate

A finding list with stable codes and severities:

"ok": false, "errorCount": 1, "warningCount": 1, "findings": [ { "severity": "error", "code": "HUMANOID_REQUIRED_BONE_MISSING", "message": "required humanoid bone is not mapped: leftHand (vrm1 required set)" }, { "severity": "warning", "code": "META_LICENSE_OTHER_URL_MISSING", "message": "licenseName is Other but otherLicenseUrl is empty" } ] }

vrm_snapshot / vrma_preview

"output_path": "...\\v1-three-quarter-snapshot.png", "format": "png", "bytes": 194005, "width": 768, "height": 1024, "view": "three_quarter", "pose": "rest", "humanoid_bone_count": 54 }

"output_path": "...\\v1-walk-preview.webm", "format": "webm", "bytes": 313597, "width": 768, "height": 768, "clip_duration_sec": 1.25, "recorded_duration_sec": 3, "fps": 30 }

Error codes / エラーコード

Every failure is a structured tool error with one of: FILE_NOT_FOUND, SIZE_BUDGET_EXCEEDED, NOT_A_GLB, NOT_A_VRM, NOT_A_VRMA, BROWSER_NOT_FOUND, RENDER_FAILED, OUTPUT_WRITE_FAILED. The server process never crashes on a bad input file.

Privacy / プライバシー

All processing is local. The server opens no network connection, sends no telemetry, and writes only the output files you name. / 処理はすべてローカルです。ネットワーク接続・テレメトリ送信はなく、書き込みは指定した出力ファイルのみです。

Development / 開発

npm test   # build + 25 self-verification tests (structural, boundary, headless rendering)

Rendering tests skip with a notice when no local Chrome/Edge is found.

License / ライセンス

MIT (see LICENSE). / MITライセンス(LICENSE参照)。

Vrm Toolkit MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

MemberVault MCP by usefulapi

README from the maker

vrm-toolkit-mcp

Tools / ツール

Requirements / 動作条件

Setup / セットアップ

Execution examples / 実行例

vrm_inspect

vrma_inspect

vrm_validate

vrm_snapshot / vrma_preview

Error codes / エラーコード

Privacy / プライバシー

Development / 開発

License / ライセンス