skanfirmy.pl MCP Server

by bartosz-kuc Your server? Claim it

answering

skanfirmy.pl is answering right now. Last checked 7 min ago. It exposes 14 tools. Last commit 1 Sep 2026.

Verify Polish companies by NIP/KRS/REGON + EU VAT (VIES). 14 MCP tools, no key.

Uptime history 25 days of history

25 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

130 ms

Response time

average over 24h

Stars

last commit 1 Sep 2026

What changed 3

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 27 August 2026. No other catalogue keeps this.

18 Sep a tool changed version

15 Sep a tool changed version

26 Aug a tool description was rewritten list_observations

Nothing serious here today

Today is the operative word: we check skanfirmy.pl 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

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 7 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add skanfirmy --transport http https://skanfirmy.pl/mcp

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

{
  "mcpServers": {
    "skanfirmy": {
      "url": "https://skanfirmy.pl/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.skanfirmy]
url = "https://skanfirmy.pl/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "skanfirmy": {
      "url": "https://skanfirmy.pl/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "skanfirmy": {
      "url": "https://skanfirmy.pl/mcp"
    }
  }
}

Available tools 14

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

sprawdz

sprawdz_lista_nip

Bulk-check up to 30 NIPs in one call to the Ministry of Finance VAT White List: VAT status, bank accounts, REGON, KRS and address of each entity. For verifying a portfolio of counterparties. Ministry limits: max 30 NIPs per call, about 500 bulk queries/day per IP. Does not fetch full KRS data (use sprawdz_nip for individual entities).

sprawdz_nip

Check VAT status (VAT White List / Biała Lista) and KRS data for a Polish company by NIP.

sprawdz_rachunek

Check whether a bank account number (NRB) appears in the VAT White List for a given NIP. Due diligence for payments above PLN 15,000.

sprawdz_regon

Look up entity data in the REGON register (Statistics Poland / GUS BIR) by NIP: REGON number, official name, legal form (legal or natural person), full address (voivodeship, county, municipality). Covers ALL entities, including sole proprietors that are not in the KRS.

sprawdz_vies

Validate a counterparty's EU VAT number in the VIES system (European Commission).

szukaj

szukaj_katalog_api

Search otwarteAPI.pl, a catalog of public Polish and EU APIs (VAT, KRS, GUS, NBP, ECB, Eurostat and more). Returns matching entries with a link to each API's official docs. An empty query returns the whole catalog (optionally narrowed by scope or topic).

szukaj_pkd

Search PKD 2025 business activity codes by activity name or code number.

changes

changes_since

Return changes (VAT status, bank accounts, or registry data — name, address, KRS, REGON — from the White List) detected since a given date for the NIPs you monitor. The field property is one of: status_vat, account_added, account_removed, name, address, krs, regon. A polling channel for agents. Requires a skanfirmy API key.

generuj

generuj_mikrorachunek

Generate the individual tax micro-account (for PIT/CIT/VAT payments) from a NIP or PESEL.

oblicz

oblicz_odsetki

Calculate statutory or commercial (B2B) late-payment interest, broken down by NBP reference-rate periods.

observations

list_observations

Return the list of NIPs you monitor, with their current VAT status and last-checked date. Each entry keeps the raw Ministry of Finance literal in status_vat and, when a status is known, adds derived language-neutral fields vat_active (boolean) and status_vat_code (active/exempt/not_registered). Requires a skanfirmy API key.

observe

observe_nip

Add a NIP to monitoring. You get notified (via changes_since or email) when its VAT status, bank account, or registry data shown on the Ministry of Finance White List (name, address, KRS, REGON) changes. Requires a skanfirmy API key (Authorization: Bearer, or the api_key argument). Free plan: up to 10 NIPs.

unobserve

unobserve_nip

Remove a NIP from monitoring. Requires a skanfirmy API key.

webhook

set_webhook

Set (or clear) a push webhook URL for your monitoring, instead of or in addition to polling. When we detect a change for a monitored NIP, we send a POST signed with HMAC-SHA256 (X-Skanfirmy-Signature header). Returns the secret ONCE. Pass an empty url to disable. Requires a skanfirmy API key. Public https addresses only (port 443).

Endpoints

URL	Transport	State	Latency	Checked
https://skanfirmy.pl/mcp	streamable-http	answering	145 ms	7 min ago

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skanfirmy.pl — questions

Answers built from our own checks of this server.

What can skanfirmy.pl do?

It exposes 14 tools, read directly from the server on our last check. Among them: changes_since, generuj_mikrorachunek, list_observations, oblicz_odsetki, observe_nip, set_webhook and 8 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

What is skanfirmy.pl mostly used for?

Its tools cluster around sprawdz and szukaj. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.

Is skanfirmy.pl working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 130 ms. The bar chart above shows every period we have measured.

How do I connect skanfirmy.pl?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does skanfirmy.pl need an API key?

No. skanfirmy.pl completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 14 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is skanfirmy.pl?

It answers our handshake in 130 ms on average, which is faster than 80% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is skanfirmy.pl open source?

Yes — it is published under the MIT licence and 0 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.