REGON (Polish business register) MCP Server

io.github.SmartMobileHouse/regon-mcp

Repository Registry

What is the REGON (Polish business register) MCP server?

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

How to install REGON (Polish business register)

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

REGON_API_KEY
secret
GUS BIR USER_KEY for live production data. Omit to use the public test key against the anonymized test database.
REGON_ENV
Which GUS environment to query: 'test' (default) or 'prod'. Use 'prod' with a real USER_KEY.

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

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