REGON (Polish business register) MCP Server: Install & Setup

Install REGON (Polish business register) in Claude Code

Claude Code

claude mcp add regon-polish-business-register -- uvx regon-mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "regon-polish-business-register": {
      "command": "uvx",
      "args": [
        "regon-mcp"
      ]
    }
  }
}

Look up Polish businesses in the GUS REGON register (BIR1) by NIP, REGON, or KRS.

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

Run: claude mcp add regon-polish-business-register -- uvx regon-mcp

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