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plugrail.dev

Provides Japanese holiday and business day calculations including holiday checks, lists, and business day arithmetic.

2 endpoints10 known toolsFirst detected July 25, 2026Last detected August 29, 2026

ENDPOINT 1

https://jp-calendar.plugrail.dev/mcp

No auth detected

MCP server metadata

Name
jp-calendar
Version
0.2.0
Capabilities
tools.listChanged

Known tools 4

is_holiday

指定した日付が日本の祝日（国民の祝日・休日）かどうかを判定します。内閣府公表データに基づきます。入力例: {"date": "2026-01-01"}

Inferred read-only
list_holidays

指定した年または期間の日本の祝日一覧を返します。入力例: {"year": 2026} または {"from": "2026-01-01", "to": "2026-06-30"}

Inferred read-only
add_business_days

指定した日付(date)の翌日から数えてN営業日目(days)の日付を返します。dateの当日は数えません。daysが負の場合は過去方向（dateの前日から遡ってN営業日目）に計算します。土日・日本の祝日を除外し、calendar="banking"を指定すると銀行休業日（12/31〜1/3）も除外します。dateが営業日かどうかだけ知りたい場合は is_holiday を使ってください（days=0でも同じ情報がskipped経由で得られます）。入力例: {"date": "2026-07-10", "days": 3}

Inferred read-only
business_days_between

from〜to間の営業日数を数えます。既定では「fromを含まず、toを含む」境界です（例:「今日から支払期日まで何営業日か」）。include_from/include_toで境界を変更できます。土日・日本の祝日を除外し、calendar="banking"を指定すると銀行休業日（12/31〜1/3）も除外します。from > to の場合はエラーにせず、from/toとinclude_from/include_toを入れ替えて計算した結果の符号を反転した値（負の営業日数）を返します（反対称則: count(A,B,x,y) = -count(B,A,y,x)。A≠B、すなわちfrom≠toの場合に成立する恒等式で、from===toはこの分岐に入らないため対象外）。入力例: {"from": "2026-07-10", "to": "2026-07-20"}

Inferred read-only

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.jp-calendar]
url = "https://jp-calendar.plugrail.dev/mcp"
enabled = true
Claude Code

.mcp.json

{
  "mcpServers": {
    "jp-calendar": {
      "type": "http",
      "url": "https://jp-calendar.plugrail.dev/mcp"
    }
  }
}
Claude Desktop

Settings → Connectors → Add custom connector

Name: jp-calendar
Remote MCP URL: https://jp-calendar.plugrail.dev/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "jp-calendar": {
      "url": "https://jp-calendar.plugrail.dev/mcp"
    }
  }
}
Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code 
{
  "servers": {
    "jp-calendar": {
      "type": "http",
      "url": "https://jp-calendar.plugrail.dev/mcp"
    }
  }
}
Generic MCP

Client-specific MCP configuration

{
  "name": "jp-calendar",
  "transport": "streamable-http",
  "url": "https://jp-calendar.plugrail.dev/mcp"
}
MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

ENDPOINT 2

https://jp-corporate.plugrail.dev/mcp

No auth detected

MCP server metadata

Name
jp-corporate
Version
0.1.0
Capabilities
tools.listChanged

Known tools 6

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": "8000000000001"}

Inferred read-only
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}

Inferred read-only
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。入力例: {"prefecture": "13", "prefix": "渋谷", "limit": 10}

Inferred read-only
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。番号確定例: {"corporateNumber": "8000000000001"}／候補例: {"name": "渋谷", "prefecture": "13", "limit": 10}

Inferred read-only
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。未発見は個人非掲載または未収録として明示し、無効・不存在と断定しません。入力例: {"invoiceNumber": "T8000000000001"}

Inferred read-only
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": "8000000000001"}

Inferred read-only

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

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

.mcp.json

{
  "mcpServers": {
    "jp-corporate": {
      "type": "http",
      "url": "https://jp-corporate.plugrail.dev/mcp"
    }
  }
}
Claude Desktop

Settings → Connectors → Add custom connector

Name: jp-corporate
Remote MCP URL: https://jp-corporate.plugrail.dev/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

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

.vscode/mcp.json

Add to Visual Studio Code 
{
  "servers": {
    "jp-corporate": {
      "type": "http",
      "url": "https://jp-corporate.plugrail.dev/mcp"
    }
  }
}
Generic MCP

Client-specific MCP configuration

{
  "name": "jp-corporate",
  "transport": "streamable-http",
  "url": "https://jp-corporate.plugrail.dev/mcp"
}
MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

TRUST AND VERIFICATION EVIDENCE

Trust Data Available

BuiltWith Trust API v2 evidence for plugrail.dev was fetched 2026-08-09T23:35:25.977Z and is being refreshed.

Trust status Neutral

plugrail.dev is assessed as Neutral: No suspicious signals found, but no strong positive signal either

Indexed

Evidence is source-attributed and does not guarantee that a third-party server is safe. Risk labels are conservative metadata heuristics.