skanfirmy.pl
REMOTE · SKANFIRMY.PL
Verify Polish companies by NIP/KRS/REGON + EU VAT (VIES). 14 MCP tools (9 no-key).
Available components
Last scanned (3 hours ago)
Scores higher than 66% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Finance and Payments
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security57
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 14 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability70
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 2449 tokens (~174/item across 14 items; 14 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 14 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 15 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 27 Oct 26 0
- Tool “sprawdz_nip” rewrote its description, which is the text the model reads security
- 21 Oct 26 0
- Tool “sprawdz_lista_nip” rewrote its description, which is the text the model reads security
- Tool “sprawdz_nip” rewrote its description, which is the text the model reads security
- 2 Oct 26 0
- Tool “unobserve_nip” rewrote its description, which is the text the model reads security
- 29 Sept 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “sprawdz_lista_nip” rewrote its description, which is the text the model reads security
- Tool “sprawdz_regon” rewrote its description, which is the text the model reads security
- Tool “unobserve_nip” rewrote its description, which is the text the model reads security
- Destructive annotations: 0 → pass functional
- Server version: 1.3.1 → 1.4.0 functional
- “unobserve_nip” reworded the description of “nip” cosmetic
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 27 Sept 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “changes_since” rewrote its description, which is the text the model reads security
- Tool “sprawdz_lista_nip” rewrote its description, which is the text the model reads security
- Tool “sprawdz_nip” rewrote its description, which is the text the model reads security
- Tool “sprawdz_regon” rewrote its description, which is the text the model reads security
- Tool “sprawdz_vies” rewrote its description, which is the text the model reads security
- Schema quality: 118 → 139 ▼ functional
- Server version: 1.1.2 → 1.2.1 functional
- 26 Sept 26 0
- Tool “generuj_mikrorachunek” rewrote its description, which is the text the model reads security
- “generuj_mikrorachunek” reworded the description of “identyfikator” cosmetic
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://skanfirmy.pl/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=skanfirmy.pl | CN=WE1,O=Google Trust Services,C=US | 17 Sept 2026 | 16 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | d3fa53becdfc20650eb9d5c2e26518d4 |
| SANs: skanfirmy.pl | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of skanfirmy.pl. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| pl. | present | 2782 | 8 | Verified |
| skanfirmy.pl. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://skanfirmy.pl/mcp | Verified | 200 | |
| http (plaintext) | http://skanfirmy.pl/mcp | HTTPS enforced | 301 | https://skanfirmy.pl/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
changes_since ~214
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. For natural persons (entities without a KRS number; natural_person: true) only status_vat, account_added and account_removed are returned, account numbers are masked (check digits + last 4, e.g. 61…2874) and name is null (GDPR); check a specific account with sprawdz_rachunek. A polling channel for agents. Requires a skanfirmy API key.
| Name | Type | Req | Description |
|---|---|---|---|
| api_key | string | – | skanfirmy API key (optional, if not in the header). |
| since | string | – | ISO date/timestamp (e.g. 2026-08-01). Returns changes since that date. Defaults to the beginning. |
No output schema declared.
No examples provided.
generuj_mikrorachunek ~133
Generate the individual tax micro-account (for PIT/CIT/VAT payments) from a NIP. The server does not accept PESEL (personal ID) — for a PESEL compute it locally: BBAN = "101000712221" + PESEL + "0", IBAN = "PL" + ISO 7064 mod-97 check digits + BBAN (or use skanfirmy.pl/mikrorachunek, which computes it in the browser).
| Name | Type | Req | Description |
|---|---|---|---|
| identyfikator | string | yes | NIP (10 digits). PESEL is not accepted by the server. |
No output schema declared.
No examples provided.
list_observations ~114
Return the list of NIPs you monitor, with their current VAT status and last-checked date (name is null for natural persons running a business). 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.
| Name | Type | Req | Description |
|---|---|---|---|
| api_key | string | – | skanfirmy API key (optional, if not in the header). |
No output schema declared.
No examples provided.
oblicz_odsetki ~167
Calculate statutory or commercial (B2B) late-payment interest, broken down by NBP reference-rate periods.
| Name | Type | Req | Description |
|---|---|---|---|
| dataDo | string | yes | Actual payment date, format YYYY-MM-DD. |
| dataOd | string | yes | Payment due date, format YYYY-MM-DD. |
| kwota | number | yes | Overdue amount in PLN. |
| typ | string | yes | kc = statutory late-payment interest (Civil Code art. 481, NBP reference rate + 5.5 pp); h10 = commercial B2B transactions, non-public debtor (NBP reference rate on 1 Jan / 1 Jul + 10 pp); h8 = comme… |
No output schema declared.
No examples provided.
observe_nip ~161
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. For natural persons running a business (entities without a KRS number) only the VAT status and masked bank accounts are monitored (GDPR): no name, address or REGON changes. Requires a skanfirmy API key (Authorization: Bearer, or the api_key argument). Free plan: up to 10 NIPs.
| Name | Type | Req | Description |
|---|---|---|---|
| api_key | string | – | skanfirmy API key (if not provided in the Authorization header). |
| nip | string | yes | 10-digit NIP to monitor. |
No output schema declared.
No examples provided.
set_webhook ~135
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).
| Name | Type | Req | Description |
|---|---|---|---|
| api_key | string | – | skanfirmy API key (optional, if not in the header). |
| url | string | – | Public https URL of the receiver (empty = disable the webhook). |
No output schema declared.
No examples provided.
sprawdz_lista_nip ~249
Bulk-check up to 30 NIPs in one call to the Ministry of Finance VAT White List: VAT status, bank accounts, REGON, KRS number and address of each entity. For entities without a KRS number (natural persons) the address is reduced to the town and bank accounts to their count, and no REGON number or registration date is returned (GDPR) — check a specific account with sprawdz_rachunek. For verifying a portfolio of counterparties. Ministry limits: max 30 NIPs per call; the Ministry's daily query limit is shared by the whole service — when it is exhausted, the tool returns an error. Does not fetch full KRS data (use sprawdz_nip for individual entities). If every NIP in the list is an entity with a KRS number already checked today, the result comes from a same-day cache without a Ministry query: mfCached is true and mfRequestDateTime is the time of the oldest of those queries.
| Name | Type | Req | Description |
|---|---|---|---|
| nipy | array | yes | List of NIPs (1 to 30). Each 10-digit with a valid checksum. Invalid NIPs are returned separately in the invalidInput field. |
No output schema declared.
No examples provided.
sprawdz_nip ~244
Check VAT status (VAT White List / Biała Lista) and KRS data for a Polish company by NIP. For entities without a KRS number (sole proprietors and civil partnerships, i.e. natural persons) personal data is limited (GDPR): the address is reduced to the town (the White List does not say whether it is a business or a home address), and bank accounts to their count — check a specific account with sprawdz_rachunek; no REGON number, registration date or PKD codes are returned for them (the ceidg field is always null). The privacy field lists what was hidden. White List data for entities with a KRS number may come from a same-day cache: then mfCached is true and bl.mfRequestDateTime is the time of the original Ministry query. If the full White List refuses the query (Ministry limit), the result may be status-only (source: status-only): bl is null and vatStatus has only the VAT status from the Ministry's API2, without name, address or bank accounts.
| Name | Type | Req | Description |
|---|---|---|---|
| nip | string | yes | 10-digit Polish NIP (tax ID). |
No output schema declared.
No examples provided.
sprawdz_rachunek ~84
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.
| Name | Type | Req | Description |
|---|---|---|---|
| nip | string | yes | 10-digit NIP of the counterparty. |
| numerRachunku | string | yes | 26-digit bank account number (NRB), without the PL prefix. |
No output schema declared.
No examples provided.
sprawdz_regon ~199
Look up entity data in the REGON register (Statistics Poland / GUS BIR) by NIP: REGON number, official name, legal form (legal or natural person), address (voivodeship, county, municipality). Covers ALL entities, including sole proprietors that are not in the KRS. For natural persons (GUS type F / LF) and civil partnerships (s.c.) only the NIP, name, entity type code (typ), form (forma: 'osoba fizyczna' / 'jednostka lokalna osoby fizycznej' / 'spółka cywilna'), town and activity status (status: active / ended) are returned — no REGON number, address, administrative units or dates (GDPR); the full entry is in the GUS REGON search (privacy.officialSource).
| Name | Type | Req | Description |
|---|---|---|---|
| nip | string | yes | 10-digit Polish NIP (tax ID). |
No output schema declared.
No examples provided.
sprawdz_vies ~90
Validate a counterparty's EU VAT number in the VIES system (European Commission). For Polish (PL) numbers the address is reduced to the town, because the number may belong to a natural person (GDPR).
| Name | Type | Req | Description |
|---|---|---|---|
| countryCode | string | yes | Two-letter EU country code (e.g. DE, IE, FR). |
| vatNumber | string | yes | VAT number without the country prefix. |
No output schema declared.
No examples provided.
szukaj_katalog_api ~151
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).
| Name | Type | Req | Description |
|---|---|---|---|
| temat | string | – | Narrow to a specific catalog tag, e.g. "firmy" or "dane-statystyczne". Optional. |
| zapytanie | string | – | Natural-language query, e.g. "euro exchange rate" or "weather data". Optional. |
| zasieg | string | – | Narrow to Polish (PL) or EU APIs. Optional. |
No output schema declared.
No examples provided.
szukaj_pkd ~57
Search PKD 2025 business activity codes by activity name or code number.
| Name | Type | Req | Description |
|---|---|---|---|
| zapytanie | string | yes | Activity name (e.g. "software") or PKD code (e.g. "62.01"). |
No output schema declared.
No examples provided.
unobserve_nip ~69
Stop watching a NIP — the watch is deleted right away. Requires a skanfirmy API key.
| Name | Type | Req | Description |
|---|---|---|---|
| api_key | string | – | skanfirmy API key (optional, if not in the header). |
| nip | string | yes | 10-digit NIP to stop watching. |
No output schema declared.
No examples provided.
How do I install the skanfirmy.pl MCP server?
skanfirmy.pl is a hosted endpoint at https://skanfirmy.pl/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · skanfirmy.pl
claude mcp add --transport http bartosz-kuc-skanfirmy 'https://skanfirmy.pl/mcp'
What is the skanfirmy.pl MCP server?
skanfirmy.pl is an MCP server listed in the public MCP registry as io.github.bartosz-kuc/skanfirmy. Verify Polish companies by NIP/KRS/REGON + EU VAT (VIES). 14 MCP tools (9 no-key). This page covers its hosted endpoint (https://skanfirmy.pl/mcp).
Is the skanfirmy.pl MCP server safe to use?
skanfirmy.pl scores 76 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the skanfirmy.pl MCP server expose?
skanfirmy.pl exposes 14 tools: sprawdz_nip, sprawdz_lista_nip, sprawdz_regon, sprawdz_vies, sprawdz_rachunek, and 9 more. Their descriptions and schemas cost roughly 2,067 tokens of context every time the server is loaded.
Does the skanfirmy.pl MCP server require authentication?
No. We connected to skanfirmy.pl without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the skanfirmy.pl MCP server still maintained?
skanfirmy.pl is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.