Verify Polish Company
Verify Polish companies and contractors by NIP, KRS, or REGON; check VAT status and bank accounts against the Ministry of Finance White List (Biała Lista); look up REGON/GUS registry data; read KRS registry data; and validate EU VAT numbers via VIES. Uses skanfirmy.pl's free, public API — no API key and no registration (per-IP rate limits apply). Use whenever the user needs to check a Polish business, a tax ID (NIP), a KRS number, a REGON, a counterparty's VAT status or bank account, or an EU VAT number (VIES).
Install
npx skills add bartosz-kuc/skanfirmy-mcp --skill verify-polish-companygit clone --depth 1 https://github.com/bartosz-kuc/skanfirmy-mcp.git /tmp/skanfirmy-mcp
mkdir -p ~/.claude/skills
cp -r /tmp/skanfirmy-mcp/skill ~/.claude/skills/verify-polish-companyPersonal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.
From the SKILL.md
# Verify a Polish company (skanfirmy.pl) This skill verifies Polish businesses straight from official government registers (Ministry of Finance, Ministry of Justice / KRS, Statistics Poland / GUS, and the European Commission / VIES) through **skanfirmy.pl**, a free public API. Every endpoint is a plain `GET` that returns JSON when you add `?format=json`. **No API key, no account.** The service is meant for single, user-driven lookups, not bulk data harvesting: REST allows at most 20 requests per 10 seconds from one IP address (HTTP 429 for 10 seconds above that), the MCP server 60 per 10 seconds. **Sole traders and other natural persons (JDG, civil partnerships) get minimised data** (GDPR): name, NIP, VAT status, town and the *number* of White List accounts — no REGON, no address, no registration date, no PKD and no list of account numbers. To check one specific account of such a counterparty, use `POST /rachunek` (or the MCP tool `sprawdz_rachunek`). Companies (entities with a KRS number) get full data. ## When to use it Reach for this skill when the user asks to: - check whether a Polish company is an **active VAT payer** or is VAT-exempt; - verify that a **bank account** belongs to a contractor on the White List (needed for Polish "due diligence" on payments over 15 000 PLN); - pull a company's **KRS** registry data (legal form, PKD, share capital, address, representation) by NIP or KRS number;
Details
- Skill name
verify-polish-company- Repository
- bartosz-kuc/skanfirmy-mcp
- Path
skill/SKILL.md- License
- MIT
- Repo updated
- 18 October 2026
- Listed in
- karanb192/awesome-claude-skills
FAQ
What does the Verify Polish Company skill do?
Verify Polish companies and contractors by NIP, KRS, or REGON; check VAT status and bank accounts against the Ministry of Finance White List (Biała Lista); look up REGON/GUS registry data; read KRS registry data; and validate EU VAT numbers via VIES. Uses skanfirmy.pl's free, public API — no API key and no registration (per-IP rate limits apply). Use whenever the user needs to check a Polish business, a tax ID (NIP), a KRS number, a REGON, a counterparty's VAT status or bank account, or an EU VAT number (VIES).
How do I install the Verify Polish Company skill?
skills CLI (Claude Code, Cursor, Codex and more): npx skills add bartosz-kuc/skanfirmy-mcp --skill verify-polish-company. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.
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