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ISZ™ 仕訳AI MCP サーバー

ISZ™ 仕訳AI MCP サーバー

Official
by iszgroup

ISZ™ 仕訳AI MCP サーバー(shiwake.ai)

npm MCP endpoint

日本語 | English

提供: ISZ™ 仕訳AI(記帳から決算・申告までをひとつで進められる AI 会計・申告ソフト)・姉妹プロダクト DenwaFlow(AI 電話受付)

日本の税務・会計の計算を、AI アシスタント(Claude・ChatGPT・Cursor など)から使えるようにする MCP サーバーです。 ISZ™ 仕訳AI(shiwake.ai) の無料ツールと同じ計算エンジンで、登録・ログインは不要です。

  • 公開エンドポイント(Streamable HTTP): https://mcp.shiwake.ai/mcp

  • ローカル(stdio): npx -y shiwake-ai-mcp(登録番号の公表データとの照合は公開エンドポイントだけ。ローカルでは形式と検算)

ツール

ツール

内容

同じ計算の Web ツール

nencho_kanpu_shisan

年末調整の還付額・追加徴収額の試算(令和8年分・令和7年分)

https://shiwake.ai/tools/nencho/

kanjo_kamoku_kensaku

取引の内容から勘定科目・仕訳例・税区分を検索

https://shiwake.ai/tools/kanjo-kamoku/

invoice_toroku_bango_check

インボイス登録番号(T+13桁)の形式・チェックディジットの確認と、国税庁の公表データとの照合(登録の有無・名称・取消/失効)

https://shiwake.ai/tools/invoice-number/

shohizei_hoshiki_hikaku

消費税の納付税額の比較(一般課税・簡易課税・2割特例・3割特例。仕入は積上げ・割戻しの両方)

https://shiwake.ai/tools/shohizei-hikaku/

どのツールも読み取り専用で、結果には根拠となる shiwake.ai のページへのリンクが付きます。結果は一般的な計算・処理の例で、個別の税務判断ではありません。

Related MCP server: JP Invoice & Tax MCP

使い方

Claude Code:

claude mcp add --transport http shiwake-ai https://mcp.shiwake.ai/mcp

Claude Desktop・Cursor など(設定ファイル):

{
  "mcpServers": {
    "shiwake-ai": { "type": "http", "url": "https://mcp.shiwake.ai/mcp" }
  }
}

stdio で動かす場合:

{
  "mcpServers": {
    "shiwake-ai": { "command": "npx", "args": ["-y", "shiwake-ai-mcp"] }
  }
}

聞き方の例: 「給与収入480万円、社会保険料72万円、源泉徴収税額12万円。年末調整でいくら戻る?」「ChatGPT の利用料の勘定科目は?」「T1120001160730 は正しい登録番号?」

データの扱い

  • ログイン・API キーは不要です。

  • サーバーが記録するのは、呼ばれたツールの名前と成否だけです。入力した金額・番号・IP アドレスは記録しません。

  • 利用の集中を防ぐため、接続元ごとに 1分あたり 60回までに制限しています。

ISZ™ 仕訳AI について

ISZ™ 仕訳AI(シワケAI/Shiwake AI)は、記帳から決算・申告までをひとつで進められる AI 会計・申告ソフトです。 領収書・請求書・通帳を AI が読み取って仕訳にし、決算書、法人税・消費税の申告書、e-Tax 用のデータまで作成できます。初期費用0円・月額の基本料金0円で、帳簿・決算・申告の機能は無料です(1人で使う場合)。

  • 税理士事務所・会計事務所の方へ:記帳代行の効率化、顧問先からの証憑回収、JDL・TKC・弥生・freee・マネーフォワードなど16社の会計ソフトへの仕訳 CSV 出力(事務所向けの料金比較)

  • ひとり社長・マイクロ法人の方へ:自分でできる法人決算。帳簿から決算書、法人税・消費税の申告書、e-Tax 申告まで(自社申告プラン)

  • 個人事業主の方へ:確定申告、インボイス、経費の考え方(個人事業主の確定申告のやり方)

あわせて:MCP サーバーの解説・無料ツール(40種類)・税金・会計の解説

English

An MCP server that lets AI assistants (Claude, ChatGPT, Cursor, etc.) run Japanese tax and accounting calculations. It uses the same calculation engine as the free tools on ISZ™ Shiwake AI (shiwake.ai). No sign-up or API key required.

  • Public endpoint (Streamable HTTP): https://mcp.shiwake.ai/mcp

  • Local (stdio): npx -y shiwake-ai-mcp (matching against the National Tax Agency's published invoice registry is available only on the public endpoint; locally, the tool checks format and check digit only)

Tools

Tool

What it does

Web version

nencho_kanpu_shisan

Estimates the year-end tax adjustment (nenmatsu chosei) refund or additional withholding for Reiwa 8 (2026) and Reiwa 7 (2025)

https://shiwake.ai/tools/nencho/

kanjo_kamoku_kensaku

Finds the account title (kanjo kamoku), sample journal entry and consumption tax category for a transaction

https://shiwake.ai/tools/kanjo-kamoku/

invoice_toroku_bango_check

Validates qualified invoice registration numbers (T + 13 digits) and matches them against the National Tax Agency's published data (registered or not, name, cancellation/expiry)

https://shiwake.ai/tools/invoice-number/

shohizei_hoshiki_hikaku

Compares consumption tax payable under the general method, simplified method, 20% special rule and 30% special rule

https://shiwake.ai/tools/shohizei-hikaku/

All tools are read-only, and every result links to the shiwake.ai page it is based on. Results are general calculation examples, not individual tax advice. Tool descriptions and results are in Japanese.

Setup

Claude Code:

claude mcp add --transport http shiwake-ai https://mcp.shiwake.ai/mcp

Claude Desktop, Cursor, etc. (config file):

{
  "mcpServers": {
    "shiwake-ai": { "type": "http", "url": "https://mcp.shiwake.ai/mcp" }
  }
}

Data handling

  • No login or API key required.

  • The server logs only the tool name and whether the call succeeded. Amounts, registration numbers and IP addresses are not logged.

  • Requests are limited to 60 per minute per client.

About ISZ™ Shiwake AI

ISZ™ Shiwake AI (シワケAI) is AI accounting and tax filing software that takes you from bookkeeping to year-end closing and tax returns in one place. AI reads receipts, invoices and bank statements and turns them into journal entries, then produces financial statements, corporate tax and consumption tax returns, and e-Tax filing data. No setup fee and no monthly base fee; bookkeeping, closing and tax filing features are free for a single user.

  • For tax accountants and accounting firms: faster bookkeeping for clients, collecting receipts from clients, and journal CSV export to 16 accounting software formats including JDL, TKC, Yayoi, freee and Money Forward

  • For solo founders and micro-corporations: do your own corporate closing, from double-entry bookkeeping to financial statements, tax returns and e-Tax filing (self-filing plan)

  • For sole proprietors: income tax returns, the qualified invoice system and how to treat expenses

Guide (Japanese): https://shiwake.ai

提供 / About us

ISZ GROUP の AI チーム(ISZ.AI)です。企業向けの AI システム開発と、2つの自社プロダクトを手がけています。

ISZ™ 仕訳AI — 記帳から決算・申告までをひとつで進められる AI 会計・申告ソフト(この MCP サーバーの提供元)

DenwaFlow — 予約・受注・問い合わせの電話を AI が受けて、最後まで完了する AI 電話受付

The AI team of ISZ GROUP (ISZ.AI). We build AI systems for businesses and two products of our own: ISZ™ Shiwake AI (AI accounting and tax filing software that takes you from bookkeeping to year-end closing and tax returns in one place; the provider of this MCP server) and DenwaFlow (an AI phone agent that takes reservations, orders and inquiries end to end).

提供: ISZ GROUP合同会社 / ISZ GROUP LLC

Tool Schema Changelog

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