@czagents/ares

Czech & Slovak business registry — look up companies by IČO, search by name, check legal form, address, and VAT status. Direct from ARES (Czech Ministry of Finance), the official source. Fast, free, no reseller markup.

Install

npm install -g @czagents/ares

Usage with Claude Desktop

{
  "mcpServers": {
    "ares": {
      "command": "npx",
      "args": ["-y", "@czagents/ares"]
    }
  }
}

Tools

• lookup_by_ico — full ARES record for one Czech company by IČO (name, address, legal form, DIČ, founding date, trade activities).
• search_companies — combined search by name, city, street, PSČ, and/or CZ-NACE codes.
• search_by_address — every company registered at a given Czech address (useful for virtual-office / shell-company checks).
• search_by_nace — companies by CZ-NACE activity code, optionally narrowed by city.
• get_bank_accounts — transparent bank accounts published for a VAT-registered subject.
• get_statutaries — current statutory body (jednatelé, představenstvo) — active members only.
• validate_dic — Czech DIČ format check + MOD11 checksum on the embedded IČO tail.
• check_vat_payer — VAT-payer status, DIČ, finanční úřad, transparent accounts.
• get_history — historical record (previous names, address changes, trade-license history).

Example prompts:

Look up Czech company with IČO 12345678.

Find all companies with CZ-NACE 62 in Praha.

Self-host

Source: https://github.com/martinhavel/cz-agents-mcp

git clone https://github.com/martinhavel/cz-agents-mcp
cd cz-agents-mcp
npm install
npm run build
node packages/ares/dist/index.js

Free tier & pricing

ARES itself is a free public API. The hosted endpoint at https://ares.cz-agents.dev/mcp is rate-limited per IP. Higher limits and commercial use: https://cz-agents.dev/pricing

License

MIT — see LICENSE