REGON (Polish business register) MCP Server

by smartmobilehouse Your server? Claim it

local only

REGON (Polish business register) runs on your own machine — the client starts it, so there is no endpoint to ping. 102 installs a week from pypi. Last commit 10 Aug 2026.

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

Installs per day peak 37 · avg 16 · -27% w/w

a month agotoday

102

Installs / week

pypi · regon-mcp

Stars

0 open issues

10 Aug 2026

Last commit

from GitHub

MIT

License

Python

Nothing serious here today

Today is the operative word: we check REGON (Polish business register) every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add regon-mcp -- uvx regon-mcp

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

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

~/.codex/config.toml

[mcp_servers.regon-mcp]
command = "uvx"
args = ["regon-mcp"]

.cursor/mcp.json

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

.vscode/mcp.json

{
  "servers": {
    "regon-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "regon-mcp"
      ]
    }
  }
}

Optional settings from the registry entry, left out of the block above: REGON_API_KEY (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).

Alternatives to REGON (Polish business register)

same job, measured the same way

Regon Pl

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EU Business & VAT Checker

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Abn Lookup

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Startup Name Check

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Check whether the domain for a startup, product or business name is already registered.

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REGON (Polish business register) — questions

Answers built from our own checks of this server.

Why is there no uptime for REGON (Polish business register)?

REGON (Polish business register) runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the pypi package regon-mcp was installed 102 times last week.

How do I connect REGON (Polish business register)?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls regon-mcp straight from pypi; nothing to host, nothing to sign up for.

How many people use REGON (Polish business register)?

The pypi package regon-mcp was installed 102 times in the last week. Week over week that is -27%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is REGON (Polish business register) open source?

Yes — it is published under the MIT licence, written in Python and 1 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.