PlugRail JP Corporate MCP Server

by plugrail Your server? Claim it

answering

PlugRail JP Corporate is answering right now. Last checked 1 min ago. It exposes 6 tools. Last commit 7 Oct 2026.

Search Japanese corporations and verify invoice numbers using official National Tax Agency data.

Uptime history 18 days of history

18 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

474 ms

Response time

average over 24h

Stars

last commit 7 Oct 2026

What changed 13

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 30 September 2026. No other catalogue keeps this.

6 Oct 5 tool descriptions were rewritten company_profile, lookup_corporate, search_corporate_by_address and 2 more

6 Oct 4 tools changed the parameters they ask for company_profile, lookup_corporate, search_corporate_by_number and 1 more

5 Oct a tool description was rewritten lookup_corporate

5 Oct a tool changed the parameters it asks for lookup_corporate

30 Sep a tool description was rewritten lookup_corporate

30 Sep a tool changed the parameters it asks for lookup_corporate

Nothing serious here today

Today is the operative word: we check PlugRail JP Corporate every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 1 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add jp-corporate --transport http https://jp-corporate.plugrail.dev/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "jp-corporate": {
      "url": "https://jp-corporate.plugrail.dev/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.jp-corporate]
url = "https://jp-corporate.plugrail.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "jp-corporate": {
      "url": "https://jp-corporate.plugrail.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "jp-corporate": {
      "url": "https://jp-corporate.plugrail.dev/mcp"
    }
  }
}

Available tools 6

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

corporate

search_corporate_by_address

都道府県＋所在地の接頭辞で日本の法人を検索します。国税庁公開データに基づきます。市区町村名の前方一致が主経路で、町名以降を含む指定（例: 港区港南・東京都港区港南）は住所全文の前方一致へ迂回し、町名のみの断片（例: 港南）は住所全文の部分一致で拾います。入力例: {"prefecture": "13", "prefix": "渋谷", "limit": 10}

search_corporate_by_name

都道府県＋法人名の接頭辞で日本の法人を検索します。国税庁公開データに基づきます。入力例: {"prefecture": "13", "prefix": "渋谷", "limit": 10}

search_corporate_by_number

法人番号（13桁）で日本の法人を1件検索します。国税庁公開データに基づきます。入力例: {"corporateNumber": "1180301018771"}

company

company_profile

法人番号（13桁）で基本情報・補助金・届出・財務の会社プロファイルを返す。各領域の出典・鮮度・欠損を保持し、部分障害時は取得済みと欠損を同時に返す。入力例: {"corporateNumber": "1180301018771"}

lookup

lookup_corporate

法人番号の確定照会と名称・所在地の候補探索を分離して返す。名称だけでは断定せず複数候補と根拠別scoreを返す。候補探索は name 指定時は prefecture 任意（省略時は全国前方一致で searchedNationwide:true・候補に県コード付き・県か住所を足すと絞り込める）。prefecture は '13' または '東京都' のどちらでも可。address が「東京都渋谷区…」のように都道府県名で始まれば prefecture は省略可（推定）。address のみの検索は prefecture または推定が必須（全国非対応）。番号確定例: {"corporateNumber": "1180301018771"}／候補例: {"name": "渋谷", "prefecture": "13", "limit": 10}／全国例: {"name": "山田工業"}

verify

verify_invoice_number

適格請求書発行事業者番号（T＋13桁）の登録・取消・失効を日付付きで照合します。本サービスは法人・人格のない社団等のデータのみを取り込み、個人事業者のデータを取り込んでいないため、個人事業者の番号はここでは見つかりません（公表サイト https://www.invoice-kohyo.nta.go.jp/ では確認できる場合があります）。未発見を無効・不存在と断定しません。登録ありの応答には法人番号データ由来の法人名 name・所在地 address を含みます（法人番号表に無い場合は null。未発見の応答は name/address ともに null）。入力例: {"invoiceNumber": "T1180301018771"}

Endpoints

URL	Transport	State	Latency	Checked
https://jp-corporate.plugrail.dev/mcp	streamable-http	answering	277 ms	1 min ago

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PlugRail JP Corporate — questions

Answers built from our own checks of this server.

What can PlugRail JP Corporate do?

It exposes 6 tools, read directly from the server on our last check. Among them: company_profile, lookup_corporate, search_corporate_by_address, search_corporate_by_name, search_corporate_by_number, verify_invoice_number. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is PlugRail JP Corporate working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 474 ms. The bar chart above shows every period we have measured.

How do I connect PlugRail JP Corporate?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does PlugRail JP Corporate need an API key?

No. PlugRail JP Corporate completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is PlugRail JP Corporate?

It answers our handshake in 474 ms on average, which is faster than 27% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is PlugRail JP Corporate open source?

Yes — it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.