jp-business-calendar-mcp

jp-business-calendar-mcp

Enables AI assistants to perform Japanese business calendar calculations including holiday detection, business day arithmetic, payment date settlement, and deadline management using local data.

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README

JP Business Calendar MCP — 日本のビジネスカレンダー MCP

PyPI Python License: MIT

AIアシスタント(Claude Desktop等)から使える、日本の実務に特化したカレンダーMCPサーバーです。 祝日判定・営業日計算・支払サイト計算・年度・締切までの残日数を、会話の中でそのまま実行できます。外部API・ログイン不要、すべてローカルで完結します。

ツール(6種・すべて動作検証済み)

ツール 内容
is_holiday 指定日が日本の祝日・休日か(振替休日・国民の休日も含む)
next_business_day n営業日後(土日祝を除く/負数で過去方向も)
business_days_between 期間の営業日数
payment_date 締め日+支払サイトから支払日を計算(休業日は前/翌営業日に調整)
fiscal_year 年度(既定4月始まり)
days_until 指定日までの残り日数・営業日数(締切管理)

祝日は固定日・ハッピーマンデー・春分/秋分(天文計算)・振替休日・国民の休日まで自動算出します。

導入

PyPIから(推奨・最短)

pip install jp-business-calendar-mcp

→ jp-business-calendar-mcp コマンドが使えます。

ソースから(開発)

git clone https://github.com/panda-studio-dev/jp-business-calendar-mcp
cd jp-business-calendar-mcp && pip install -e .

Claude Desktop 設定

claude_desktop_config.json に追記:

{ "mcpServers": { "jp-business-calendar": { "command": "jp-business-calendar-mcp" } } }

(ソースから動かす場合は "command": "python3", "args": ["/絶対パス/server.py"])

使用例

  • 「2026年5月6日は祝日?」→ 振替休日
  • 「今日から10営業日後は?」
  • 「7/15請求、月末締め翌月末払いの支払日は?」→ 2026-08-31
  • 「2026年3月31日は何年度?」→ 2025年度

ライセンス / 免責

MIT License。個人・商用利用可。祝日・営業日は一般的なルールに基づく補助であり、正確性を保証しません。重要な判断は公式のカレンダー等でご確認ください。

関連

  • GitHub: https://github.com/panda-studio-dev/jp-business-calendar-mcp
  • 姉妹版: JP Invoice & Tax MCP(消費税・源泉徴収・インボイス番号検証)

made by panda studio ・ 「JP Invoice & Tax MCP」と合わせて日本のフリーランス/中小の実務MCPスイート

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