Color Palette Generator MCP App

Color Palette Generator MCP App

Enables users to generate color palettes (complementary, analogous, triadic, etc.) and check WCAG contrast ratios within AI chat applications using interactive UI.

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Color Palette Generator MCP App

AIチャット内にインタラクティブなカラーパレット生成UIを埋め込むMCP Appです。

セットアップ

pnpm install

起動方法

# UIビルド + サーバー起動
pnpm start

サーバーが http://localhost:3001/mcp で起動します。

開発モード（ホットリロード）

pnpm dev

Claude Desktopへの接続

~/Library/Application Support/Claude/claude_desktop_config.json に以下を追加します。

{
  "mcpServers": {
    "color-palette": {
      "command": "/opt/homebrew/bin/npx",
      "args": ["tsx", "/path/to/mcp-apps/main.ts", "--stdio"]
    }
  }
}

設定後、Claude Desktopを再起動してください。

HTTP経由で接続する場合

pnpm serve

で起動後、http://localhost:3001/mcp に接続します。

動作確認（curl）

# initializeリクエスト
curl -X POST http://localhost:3001/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-03-26","capabilities":{},"clientInfo":{"name":"test","version":"1.0.0"}}}'

# パレット生成
curl -X POST http://localhost:3001/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"generate-palette","arguments":{"baseColor":"#3498db","paletteType":"analogous"}}}'

ツール

ツール名 説明
generate-palette ベースカラーからパレットを生成（complementary, analogous, triadic, monochromatic, split-complementary）
check-contrast 2色間のWCAGコントラスト比を計算

新しいMCP Appプロジェクトを作る

このプロジェクトの構成をベースに、新しいMCP Appをスキャフォールドするスキルを用意しています。

Claude Code上で以下を実行してください。

/skill dev_init-mcp-app my-new-app

サーバー・クライアント・Viteバンドル・デュアルトランスポート（stdio + HTTP）の雛形が一括生成されます。

技術スタック

  • @modelcontextprotocol/ext-apps 1.0.1
  • @modelcontextprotocol/sdk 1.26.0
  • zod 4.x
  • Vite + vite-plugin-singlefile
  • TypeScript

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