mcp-server-corporation

MCP (Model Context Protocol) server for searching Japanese corporations, invoice registration numbers, and EDINET listed companies via the corporation.teraren.com public API.

Tools

| Tool | Description | |------|-------------| | search_corporations | Search corporations by name or 13-digit corporate number | | get_corporation | Get a corporation by its 13-digit corporate number | | search_invoice_numbers | Search invoice registration numbers (適格請求書発行事業者) | | get_invoice_number | Get an invoice registration by T-prefixed number | | search_edinets | Search EDINET listed companies |

Setup

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "corporation": {
      "command": "npx",
      "args": ["-y", "mcp-server-corporation"]
    }
  }
}

Claude Code

claude mcp add corporation -- npx -y mcp-server-corporation

Manual / Other MCP Clients

npx -y mcp-server-corporation

The server communicates via stdio using the MCP protocol.

Examples

Once configured, you can ask your AI assistant:

• "日本郵便の法人番号を調べて" (Look up Japan Post's corporate number)
• "法人番号 1070001005817 の詳細を教えて" (Get details for corporate number 1070001005817)
• "T4010301136081 のインボイス登録情報を確認して" (Check invoice registration for T4010301136081)
• "トヨタ自動車のEDINETコードを検索して" (Search Toyota Motor's EDINET code)

Development

npm install
npm run build
npm start

API

This MCP server wraps the public REST API at https://corporation.teraren.com. No API key or registration required. See API documentation for details.

License

CC-BY-SA-4.0