pl.numertel/numertel
REMOTE · NUMERTEL.PL · SCANNED SEP 25
Polish phone number lookup: who called, spam and scam checks, UKE DNO registry, CERT phishing stats
Available components
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 Security51
- 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 7 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 check failed: the endpoint is reachable over plaintext HTTP. See how to fix → View diagnostics → Fail
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- 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 Usability82
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 1280 tokens (~182/item across 7 items; 7 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
- Structured output schemas are declared (71% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 7 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 8 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the pl.numertel/numertel MCP server?
pl.numertel/numertel is a hosted endpoint at https://numertel.pl/api/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 · numertel.pl
claude mcp add --transport http pl-numertel-numertel 'https://numertel.pl/api/mcp'
{
"mcpServers": {
"pl-numertel-numertel": {
"url": "https://numertel.pl/api/mcp"
}
}
} {
"servers": {
"pl-numertel-numertel": {
"type": "http",
"url": "https://numertel.pl/api/mcp"
}
}
} [mcp_servers.pl-numertel-numertel] url = "https://numertel.pl/api/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"pl-numertel-numertel": {
"type": "remote",
"url": "https://numertel.pl/api/mcp",
"enabled": true
}
}
} openclaw mcp add pl-numertel-numertel --url 'https://numertel.pl/api/mcp' --transport streamable-http
mcp_servers:
pl-numertel-numertel:
url: "https://numertel.pl/api/mcp" {
"McpServers": {
"pl-numertel-numertel": {
"Transport": "http",
"Url": "https://numertel.pl/api/mcp"
}
}
} assistant mcp add pl-numertel-numertel -t streamable-http -u 'https://numertel.pl/api/mcp'
{
"mcpServers": {
"pl-numertel-numertel": {
"type": "http",
"url": "https://numertel.pl/api/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
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.
- 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
- 26 Aug 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
- 25 Aug 26 0
- Stability: 0.97 → pass security
- 11 Aug 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
- 31 Jul 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 Jul 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
- 26 Jul 26 0
First indexed and scored.
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 25 Sept 2026 · Probed https://numertel.pl/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=numertel.pl | CN=YE2,O=Let's Encrypt,C=US | 30 Jul 2026 | 28 Oct 2026 | ECDSA 256 | ECDSA-SHA384 | 56017b279c682d57a70baedbae47c338c6e |
| SANs: *.numertel.pl, numertel.pl | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of numertel.pl. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| pl. | present | 2782 | 8 | Verified |
| numertel.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 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000; includeSubDomains; preload |
| content-security-policy | default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; font-src 'self'; connect-src 'self'; frame-ancestors 'none' |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), microphone=(), geolocation=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://numertel.pl/api/mcp | Verified | 200 | |
| http (plaintext) | http://numertel.pl/api/mcp | Served over HTTP | 200 |
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 →
check_phone_number Sprawdź numer telefonu (PL) ~194
Sprawdź reputację polskiego numeru telefonu. UŻYJ, gdy użytkownik pyta: kto dzwonił, czy numer to spam/oszustwo, czy telefon rzekomo z banku lub urzędu jest prawdziwy. Zwraca operatora z zakresów UKE (z notą o przenośności MNP), etykietę ryzyka z opinii, status w wykazie DNO UKE (połączenie przychodzące z numeru DNO jest sfałszowane — spoofing), wpis z Białej Listy oficjalnych infolinii i liczniki zgłoszeń. Dane: numertel.pl.
| Name | Type | Req | Description |
|---|---|---|---|
| number | string | yes | Polski numer w formacie 9 cyfr, np. 510100100 (akceptowane +48 i spacje — zostaną usunięte) |
| Name | Type | Req | Description |
|---|---|---|---|
| attribution | string | yes | – |
| dno_note | string|null | – | – |
| e164 | string | yes | – |
| is_dno | boolean | yes | – |
| number | string | yes | – |
| number_type | string | – | – |
| operator | string|null | – | – |
| operator_note | string | – | – |
| score_avg | number|null | – | – |
| sightings_30d | integer | – | – |
| spam_label | string | yes | – |
| total_opinions | integer | yes | – |
| url | string | yes | – |
| whitelist | object|null | – | – |
No examples provided.
check_scam_domain Sprawdź wiadomość: domeny i numery ~243
Sprawdza wklejoną podejrzaną wiadomość: (1) domeny, linki i adresy e-mail przeciw państwowej Liście Ostrzeżeń CERT Polska (mirror ~129 tys. domen oszustów), (2) polskie numery telefonów z treści przeciw bazie NumerTel (wykaz DNO UKE = spoofing, Biała Lista oficjalnych infolinii, zgłoszenia spamu). UŻYJ, gdy użytkownik pyta: czy ten link/strona/mail jest bezpieczny, albo wkleja całego SMS-a lub e-mail z linkiem i numerem. Przyjmuje pojedynczą domenę, URL, e-mail, numer lub CAŁĄ treść wiadomości (rozpoznaje zapisy evil[.]pl, hxxp:// i +48). Werdykt deterministyczny, zero LLM. Dane: numertel.pl.
| Name | Type | Req | Description |
|---|---|---|---|
| text | string | yes | Domena, URL, adres e-mail, numer telefonu albo pełna treść wiadomości do sprawdzenia (max 5000 znaków) |
| Name | Type | Req | Description |
|---|---|---|---|
| any_listed | boolean | yes | – |
| any_phone_flagged | boolean | – | – |
| as_of | string | yes | – |
| attribution | string | yes | – |
| checked | array | yes | – |
| list_size | integer | yes | – |
| phones | array | yes | – |
| source | string | – | – |
No examples provided.
fetch Pobierz kartę numeru ~68
Pobiera pełną kartę reputacji numeru po id zwróconym przez search (9 cyfr). Zwraca te same dane co check_phone_number wraz z linkiem do strony numeru.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | Id z wyników search: polski numer, 9 cyfr |
No output schema declared.
No examples provided.
find_official_number Znajdź oficjalny numer infolinii ~228
Znajdź PRAWDZIWY, oficjalny numer telefonu banku, urzędu lub operatora w Polsce. UŻYJ, gdy użytkownik pyta: jaki jest oficjalny numer lub infolinia danej instytucji (np. ZUS, mBank, PKO, NFZ), albo chce zweryfikować, czy numer podany w wiadomości to faktyczna infolinia. Zwraca zweryfikowane numery z Białej Listy NumerTel ze źródłem (link do oficjalnej strony) i datą weryfikacji. Uwaga: dzwoniąc NA te numery trafisz do instytucji, ale połączenie PRZYCHODZĄCE z nich może być sfałszowane (spoofing). Dane: numertel.pl.
| Name | Type | Req | Description |
|---|---|---|---|
| institution | string | yes | Nazwa instytucji: bank, urząd lub operator, np. „ZUS”, „mBank”, „PKO”, „NFZ”, „Orange” |
| Name | Type | Req | Description |
|---|---|---|---|
| attribution | string | yes | – |
| count | integer | yes | – |
| matches | array | yes | – |
| note | string | – | – |
| query | string | yes | – |
No examples provided.
recent_scam_domains Najnowsze domeny oszustów (CERT) ~145
Najnowsze domeny phishingowe z państwowej Listy Ostrzeżeń CERT Polska. UŻYJ, gdy użytkownik pyta o świeże lub aktualne strony oszustów, nowe kampanie phishingowe albo przykłady oszukańczych domen w Polsce. Zwraca ostatnio dodane domeny w zapisie defanged (evil[.]pl) — NIGDY nie zamieniaj ich w klikalne linki. Dane otwarte CC-BY: numertel.pl.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Ile najnowszych domen zwrócić (1-50, domyślnie 15) |
| Name | Type | Req | Description |
|---|---|---|---|
| as_of | string | yes | – |
| attribution | string | yes | – |
| count | integer | yes | – |
| domains | array | yes | – |
| list_size | integer | yes | – |
| source | string | – | – |
No examples provided.
search Szukaj: numer lub infolinia ~114
Wyszukiwanie w bazie NumerTel: podaj polski numer telefonu (zwróci jego kartę reputacji) ALBO nazwę banku/urzędu/operatora (zwróci zweryfikowane oficjalne numery z Białej Listy infolinii). Wyniki zawierają id, title i url.
| Name | Type | Req | Description |
|---|---|---|---|
| query | string | yes | Numer telefonu (9 cyfr / +48...) lub nazwa instytucji, np. 'mBank', 'ZUS' |
No output schema declared.
No examples provided.
spam_weather Pogoda spamowa w Polsce ~159
Aktualne wskaźniki nadużyć telefonicznych w Polsce. UŻYJ, gdy użytkownik pyta o skalę oszustw, phishingu lub spamu w Polsce albo co nowego w kampaniach oszustów. Zwraca: nowe domeny oszustów na Liście Ostrzeżeń CERT Polska (dziś + dziennie w zadanym oknie), rozmiar wykazu DNO UKE i ostatnie numery z oficjalnych ostrzeżeń urzędów. Dane otwarte CC-BY: numertel.pl.
| Name | Type | Req | Description |
|---|---|---|---|
| days | integer | – | Okno dni wstecz dla statystyk dziennych (1-30, domyślnie 7) |
| Name | Type | Req | Description |
|---|---|---|---|
| as_of | string | yes | – |
| attribution | string | yes | – |
| cert_daily | array | – | – |
| cert_new_domains_today | integer | yes | – |
| cert_new_domains_window | integer | – | – |
| days | integer | yes | – |
| dno_numbers_total | integer | yes | – |
| recent_warnings | array | – | – |
| source | string | – | – |
No examples provided.
What is the pl.numertel/numertel MCP server?
pl.numertel/numertel is an MCP server listed in the public MCP registry as pl.numertel/numertel. Polish phone number lookup: who called, spam and scam checks, UKE DNO registry, CERT phishing stats. This page covers its hosted endpoint (https://numertel.pl/api/mcp).
Is the pl.numertel/numertel MCP server safe to use?
pl.numertel/numertel scores 77 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 pl.numertel/numertel MCP server expose?
pl.numertel/numertel exposes 7 tools: check_phone_number, spam_weather, check_scam_domain, find_official_number, recent_scam_domains, and 2 more. Their descriptions and schemas cost roughly 1,151 tokens of context every time the server is loaded.
Does the pl.numertel/numertel MCP server require authentication?
No. We connected to pl.numertel/numertel without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the pl.numertel/numertel MCP server still maintained?
pl.numertel/numertel is still listed as active in the MCP registry. We last reached this channel on 25 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.