nipregon-mcp
Look up Polish companies from any AI assistant: registry data (KRS, REGON, CEIDG), VAT white list checks before payments, and financial statements of 4.4M businesses. Read-only tools backed by official public registers.
README

NIPRegon MCP Server
Look up Polish companies from any AI assistant: registry data (KRS, REGON, CEIDG), VAT white list checks before payments, and financial statements of 4.4M Polish businesses.
Backed by NIPRegon.pl: data sourced exclusively from official public registers (KRS, REGON, CEIDG, the Ministry of Finance VAT white list and financial statements filed with the National Court Register).
Remote server (recommended)
One endpoint, zero install:
https://api.nipregon.pl/mcp
Generic config that works in most MCP clients:
{
"mcpServers": {
"nipregon": {
"type": "http",
"url": "https://api.nipregon.pl/mcp"
}
}
}
<details> <summary><b>Claude Code</b></summary>
claude mcp add --transport http nipregon https://api.nipregon.pl/mcp
</details>
<details> <summary><b>Cursor</b></summary>
Use the install button above, or add to ~/.cursor/mcp.json:
{
"mcpServers": {
"nipregon": { "url": "https://api.nipregon.pl/mcp" }
}
}
</details>
<details> <summary><b>VS Code</b></summary>
Use the install button above, or add to mcp.json:
{
"servers": {
"nipregon": { "type": "http", "url": "https://api.nipregon.pl/mcp" }
}
}
</details>
<details> <summary><b>Claude Desktop / claude.ai</b></summary>
Settings → Connectors → Add custom connector → paste
https://api.nipregon.pl/mcp.
Or, for any client without native streamable HTTP support:
{
"mcpServers": {
"nipregon": {
"command": "npx",
"args": ["mcp-remote", "https://api.nipregon.pl/mcp"]
}
}
}
</details>
Transport: streamable HTTP (JSON-RPC 2.0). Free tier: 100 tool calls/day/IP.
Try asking your assistant
- "Check the company with NIP 7791906082 before I sign this contract."
- "Find the company Eurocash and show its revenue for the last 5 years."
- "Is the bank account on this invoice really on the VAT white list of the supplier?"
Tools
- search_company — fuzzy search of Polish companies by name. Returns NIP,
KRS, city, status and a profile URL. Inputs:
query(string, min 3 chars),limit(1-10, default 5). Read-only. - get_company — full registry data of a Polish company by NIP: address,
legal form, status, KRS, REGON, PKD activity codes, board members, VAT
status. Inputs:
nip(string, 10 digits). Read-only. - get_financials — yearly financial statements filed with the National
Court Register: revenue, net profit, total assets, equity, liabilities.
Inputs:
nip. Read-only. - check_vat_whitelist — the company's VAT status in the Ministry of
Finance taxpayer register (white list) and, optionally, whether a bank
account number is on the company's white list. In Poland, paying more than
PLN 15k to an account outside the white list has tax consequences. Inputs:
nip, optionalaccount(26 digits). Read-only.
Example response (shortened):
{
"nip": "7822463563",
"statements": [
{ "year": 2024, "revenue": 24436276969.00, "net_profit": 184561157.00 },
{ "year": 2023, "revenue": 21382959713.00, "net_profit": 176885896.00 }
],
"source": "Sprawozdania finansowe KRS (RDF)"
}
Local stdio bridge (single file, zero dependencies)
For clients that only support stdio. Requires Node 18+. Download
nipregon-mcp.mjs:
{
"mcpServers": {
"nipregon": {
"command": "node",
"args": ["/path/to/nipregon-mcp.mjs"],
"env": { "NIPREGON_API_KEY": "(optional, for higher limits)" }
}
}
}
REST API
The same data over plain REST — see the API docs (Polish). Self-service API keys with Free/Start/Pro/Scale plans, an interactive playground and Stripe billing.
Troubleshooting
- Client doesn't support remote MCP servers — use the
mcp-remotebridge (see Claude Desktop above) or the local stdio file. - HTTP 429 / limit message — the free daily limit (100 tool calls/IP) was reached; try tomorrow or get an API key at nipregon.pl/api.
- Company not found —
get_companyandget_financialscover companies registered in the National Court Register (KRS); financial data covers companies that filed statements electronically.
Data and privacy
The server is read-only and returns only data from official public registers. Sole-trader (JDG) records constitute personal data under GDPR: it is prohibited to use this server for creditworthiness scoring, automated assessment of natural persons or direct marketing towards sole traders. Queries are not logged beyond anonymous daily rate-limit counters. Details: terms of service (Polish).

🇵🇱 NIPRegon MCP Server (dokumentacja po polsku)
Sprawdzaj polskie firmy z poziomu dowolnego asystenta AI: dane rejestrowe (KRS, REGON, CEIDG), biała lista VAT przed przelewem i sprawozdania finansowe 4,4 mln polskich podmiotów.
Zasilane przez NIPRegon.pl: dane wyłącznie z oficjalnych rejestrów publicznych (KRS, REGON, CEIDG, wykaz podatników VAT Ministerstwa Finansów oraz sprawozdania finansowe złożone do KRS).
Serwer zdalny (zalecany)
Jeden endpoint, zero instalacji:
https://api.nipregon.pl/mcp
Uniwersalna konfiguracja dla większości klientów MCP:
{
"mcpServers": {
"nipregon": {
"type": "http",
"url": "https://api.nipregon.pl/mcp"
}
}
}
Claude Code:
claude mcp add --transport http nipregon https://api.nipregon.pl/mcp
Claude Desktop / claude.ai: Ustawienia → Konektory → Dodaj własny konektor
→ wklej https://api.nipregon.pl/mcp.
Transport: streamable HTTP (JSON-RPC 2.0). Darmowy limit: 100 wywołań narzędzi dziennie na adres IP. Wyższe limity: nipregon.pl/api.
Zapytaj swojego asystenta
- „Sprawdź firmę o NIP 7791906082, zanim podpiszę umowę."
- „Znajdź spółkę Eurocash i pokaż jej przychody z ostatnich 5 lat."
- „Czy rachunek z tej faktury jest na białej liście dostawcy?"
Narzędzia
- search_company — wyszukiwanie spółek po nazwie (fuzzy). Zwraca NIP, KRS, miasto, status i link do profilu.
- get_company — pełne dane rejestrowe spółki po NIP: adres, forma prawna, status, KRS, REGON, kody PKD, zarząd, status VAT.
- get_financials — roczne sprawozdania finansowe z KRS: przychody, zysk netto, aktywa, kapitał własny, zobowiązania.
- check_vat_whitelist — status VAT w wykazie podatników (biała lista KAS) i opcjonalnie weryfikacja, czy numer rachunku figuruje na białej liście podmiotu (istotne przed przelewem powyżej 15 tys. zł).
Dane i prywatność
Serwer jest tylko do odczytu i zwraca wyłącznie dane z oficjalnych rejestrów publicznych. Dane JDG stanowią dane osobowe (RODO): zakaz wykorzystania do scoringu kredytowego, automatycznej oceny osób fizycznych i marketingu bezpośredniego wobec JDG. Zapytania nie są logowane poza anonimowymi licznikami limitów dziennych. Szczegóły: regulamin.
License
MIT (this client and manifest). The NIPRegon.pl service itself is a separate, proprietary product of WEBY SOLUTION SP. Z O.O.
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