How do I install REGON (Polish business register)?

Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.

Is REGON (Polish business register) official?

No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.

How is the trust score calculated?

This listing scores 50 (Fair). The formula is published on the methodology page.

MCPpedia

REGON (Polish business register) MCP Server | MCPpedia

REGON (Polish business register) MCP Server

Name: REGON (Polish business register) MCP Server
Author: smartmobilehouse

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

Tools Versions Alternatives

Registrysmartmobilehouse

50Fair

Install

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

{
  "mcpServers": {
    "smartmobilehouse-regon-mcp": {
      "command": "uvx",
      "args": [
        "regon-mcp"
      ],
      "env": {
        "REGON_API_KEY": "YOUR_REGON_API_KEY",
        "REGON_ENV": ""
      }
    }
  }
}

Install guide

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Environment

Name	Required	Notes
REGON_API_KEY	No	GUS BIR USER_KEY for live production data. Omit to use the public test key against the anonymized test database. Secret.
REGON_ENV	No	Which GUS environment to query: 'test' (default) or 'prod'. Use 'prod' with a real USER_KEY.

REGON (Polish business register) MCP Server

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