MCPInstall

mcp

Model Context Protocol (MCP) サーバーの作成・管理ガイド。カスタムツールの追加方法。 使用タイミング: (1) Claude Codeにカスタムツールを追加したい時 (2) 外部サービス連携時 (3) プロジェクト固有の自動化ツールを作りたい時 (4) MCPサーバーの設定方法を知りたい時。 トリガー例: 「MCPサーバーを作って」「カスタムツールを追加」「MCP設定」 「外部APIをツール化」「テストランナーMCP」

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Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/kimny1143/claude-code-template --skill mcp
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads mcp automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

mcp - MCP Server 作成

Model Context Protocol (MCP) サーバーの作成・管理。


概要

MCP は Claude Code にカスタムツールを追加するためのプロトコル。

用途:

  • プロジェクト固有のツール提供
  • 外部サービス連携
  • 自動化タスク

基本構造

// scripts/mcp/my-tool.js
import { Server } from "@modelcontextprotocol/sdk/server/index.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";

const server = new Server(
  { name: "my-tool", version: "1.0.0" },
  { capabilities: { tools: {} } }
);

// ツール一覧
server.setRequestHandler("tools/list", async () => ({
  tools: [
    {
      name: "my_custom_tool",
      description: "カスタムツールの説明",
      inputSchema: {
        type: "object",
        properties: {
          param1: { type: "string", description: "パラメータ1" },
        },
        required: ["param1"],
      },
    },
  ],
}));

// ツール実行
server.setRequestHandler("tools/call", async (request) => {
  const { name, arguments: args } = request.params;

  if (name === "my_custom_tool") {
    const result = await doSomething(args.param1);
    return { content: [{ type: "text", text: JSON.stringify(result) }] };
  }

  throw new Error(`Unknown tool: ${name}`);
});

// サーバー起動
const transport = new StdioServerTransport();
await server.connect(transport);

設定

プロジェクトレベル (.mcp.json)

{
  "mcpServers": {
    "my-tool": {
      "command": "node",
      "args": ["scripts/mcp/my-tool.js"]
    }
  }
}

ユーザーレベル (~/.claude/settings.json)

{
  "mcpServers": {
    "my-global-tool": {
      "command": "node",
      "args": ["/path/to/tool.js"]
    }
  }
}

実用例

テストランナー

server.setRequestHandler("tools/list", async () => ({
  tools: [
    {
      name: "run_tests",
      description: "ユニットテストを実行",
      inputSchema: {
        type: "object",
        properties: {
          pattern: { type: "string", description: "テストパターン" },
        },
      },
    },
  ],
}));

server.setRequestHandler("tools/call", async (request) => {
  if (request.params.name === "run_tests") {
    const pattern = request.params.arguments?.pattern || "";
    const result = await runTests(pattern);
    return { content: [{ type: "text", text: result }] };
  }
});

async function runTests(pattern) {
  const { execSync } = await import("child_process");
  try {
    const output = execSync(`npm test -- ${pattern}`, { encoding: "utf-8" });
    return output;
  } catch (error) {
    return error.stdout + error.stderr;
  }
}

DB クエリ

{
  name: "query_database",
  description: "データベースにクエリを実行",
  inputSchema: {
    type: "object",
    properties: {
      query: { type: "string", description: "SQL クエリ" },
    },
    required: ["query"],
  },
}

コンテキスト節約

使わないMCPサーバーを無効化してコンテキストを節約:

// .mcp.json
{
  "mcpServers": {
    "frequently-used": { "command": "node", "args": ["tool1.js"] }
  },
  "disabledMcpServers": [
    "rarely-used-tool",
    "heavy-context-tool"
  ]
}

デバッグ

# 直接実行
node scripts/mcp/my-tool.js

# ログ確認
DEBUG=mcp* node scripts/mcp/my-tool.js

# Claude Code で確認
# /mcp コマンドで接続状態を確認

ベストプラクティス

  1. エラーハンドリング: 常に try-catch で囲む
  2. タイムアウト: 長時間処理は避ける(30秒以内)
  3. 説明を明確に: description はツール選択の判断材料
  4. inputSchema 必須: パラメータの型を明示
  5. 10個以下: プロジェクトあたりのMCP数を制限

FAQ

What does the mcp skill do?

Model Context Protocol (MCP) サーバーの作成・管理ガイド。カスタムツールの追加方法。 使用タイミング: (1) Claude Codeにカスタムツールを追加したい時 (2) 外部サービス連携時 (3) プロジェクト固有の自動化ツールを作りたい時 (4) MCPサーバーの設定方法を知りたい時。 トリガー例: 「MCPサーバーを作って」「カスタムツールを追加」「MCP設定」 「外部APIをツール化」「テストランナーMCP」

How do I install mcp?

Run npx skills add https://github.com/kimny1143/claude-code-template --skill mcp in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/mcp/ (personal) or .claude/skills/mcp/ (project).

Which AI agents can use mcp?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is mcp safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains mcp?

It is published by kimny1143 in kimny1143/claude-code-template. It has 71 recorded installs.

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