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Numertel

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Polish phone number lookup: who called, spam and scam checks, UKE DNO registry, CERT phishing stats

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to CursorAdd to VS Code
Manual Client & Custom JSON ConfigExpand JSON â–¾

Client Config & Setup

Choose your client or environment
Target File:~/Library/Application Support/Claude/claude_desktop_config.json
claude_desktop_config.json
{
  "mcpServers": {
    "numertel": {
      "command": "npx",
      "args": [
        "-y",
        "numertel"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Install Directory Badge Claim listing Alternatives💻 More in Developer Tools

Documentation Overview

NumerTel MCP Server

English · Polski

NumerTel MCP Server

Check Polish phone numbers from any AI assistant: who called, is it spam or a scam, is this really a bank's number — plus live phone-abuse stats for Poland.

Backed by NumerTel.pl: 130M numbers built on official UKE numbering ranges, user reports, the state DNO registry and CERT Polska's public Warning List.

License: MIT Website MCP Registry Glama MCP server

Install MCP Server Install in VS Code

Remote server (recommended)

One endpoint, zero install:

Code
https://numertel.pl/api/mcp

Generic config that works in most MCP clients:

config.json
{
  "mcpServers": {
    "numertel": {
      "type": "http",
      "url": "https://numertel.pl/api/mcp"
    }
  }
}
Claude Code
Terminal
claude mcp add --transport http numertel https://numertel.pl/api/mcp
Cursor

Use the install button above, or add to ~/.cursor/mcp.json:

config.json
{
  "mcpServers": {
    "numertel": { "url": "https://numertel.pl/api/mcp" }
  }
}
VS Code

Use the install button above, or add to mcp.json:

config.json
{
  "servers": {
    "numertel": { "type": "http", "url": "https://numertel.pl/api/mcp" }
  }
}
Claude Desktop (or any client without native streamable HTTP)
config.json
{
  "mcpServers": {
    "numertel": {
      "command": "npx",
      "args": ["mcp-remote", "https://numertel.pl/api/mcp"]
    }
  }
}

Transport: streamable HTTP (JSON-RPC 2.0). Limit: 30 requests/day/IP.

Try asking your assistant

  • "Who called me from 500 100 200?"
  • "Is +48 22 598 40 44 really my bank, or a scam?"
  • "How bad is phone phishing in Poland today?"

Tools

  • check_phone_number — full reputation card for a Polish number: operator (original UKE range, MNP note), risk label from user reports, UKE DNO registry status (an incoming call from a DNO number is spoofed by definition), verified official-hotline whitelist, report counts. Inputs: number (string, 9 digits). Read-only, structured output.
  • spam_weather — phone-abuse indicators for Poland: new scam domains on CERT Polska's Warning List (today + daily series), DNO registry size and the latest numbers from official warnings. Inputs: days (1-30, default 7). Read-only, structured output, open data (CC-BY).
  • check_scam_domain — analyzes a whole pasted suspicious message on two axes: (1) domains, links and email addresses against CERT Polska's official Warning List (a mirror of ~129k scam domains), and (2) Polish phone numbers found in the text against the NumerTel base (UKE DNO registry = spoofing, verified official-hotline whitelist, spam reports). Accepts a single domain/URL/email/number or a full message (extracts evil[.]pl / hxxp:// / +48); suffix match, so login.evil.pl hits evil.pl. Deterministic verdict with the listing date, zero LLM. Read-only, structured output.
  • find_official_number — the real, official number of a Polish bank, office or operator. Given an institution name (e.g. ZUS, mBank, NFZ), returns its verified numbers from the whitelist with source link and verification date. Inputs: institution (string). Read-only, structured output.
  • recent_scam_domains — the latest phishing domains from CERT Polska's official Warning List, defanged (evil[.]pl, never clickable). Inputs: limit (1-50, default 15). Read-only, open data (CC-BY).
  • search — a Polish phone number OR an institution name (returns verified official hotlines from the whitelist). ChatGPT deep-research compatible.
  • fetch — full card by id from search results.

Prompts

Ready-made actions that appear in Claude's "+" menu under the NumerTel brand: sprawdz_numer (full number analysis with fresh embedded data), przeanalizuj_sms (scam analysis of a pasted SMS — runs on the client's model), pogoda_spamowa_dzis (today's phone-abuse report for Poland).

Also works in

  • ChatGPT (Plus/Pro, incl. Poland): Settings -> Apps & Connectors -> Advanced -> Developer mode -> Create connector -> paste https://numertel.pl/api/mcp (No authentication).
  • Gemini CLI: {"mcpServers":{"numertel":{"httpUrl":"https://numertel.pl/api/mcp"}}}
  • Microsoft Copilot Studio: Tools -> Add Tool -> MCP -> paste the URL.

Higher limits: API key via Authorization: Bearer header (kontakt@numertel.pl).

Example response (shortened):

config.json
{
  "number": "225984044",
  "operator": "Strefa Warszawa",
  "spam_label": "dno_spoofing",
  "is_dno": true,
  "dno_note": "Numer służy wyłącznie do odbierania połączeń (wykaz DNO UKE)...",
  "url": "https://numertel.pl/numer/225984044"
}

Local stdio server (single file, zero dependencies)

For clients that only support stdio. Requires Node 18+. Download numertel-mcp.mjs (also in this repo):

config.json
{
  "mcpServers": {
    "numertel": {
      "command": "node",
      "args": ["/path/to/numertel-mcp.mjs"],
      "env": { "NUMERTEL_API_KEY": "(optional, for higher limits)" }
    }
  }
}

REST API

The same data over plain REST — see the developer docs (Polish): GET https://numertel.pl/api/v1/check/{number} (20 req/day/IP without a key) and GET https://numertel.pl/api/v1/spam-weather (no limit, CC-BY). Higher limits / API keys: kontakt@numertel.pl

Troubleshooting

  • Client doesn't support remote MCP servers — use the mcp-remote bridge (see Claude Desktop above) or the local stdio file.
  • HTTP 429 — the free daily limit was reached; try tomorrow or ask for a key.
  • "Numer spoza znanych zakresów" (404) — the number is outside Polish numbering ranges; pass 9 digits in national format.

Privacy

The server is read-only and returns only data already public on numertel.pl number pages — never opinion contents, never personal data. Queries are not logged beyond anonymous daily rate-limit counters. Attribution "dane: numertel.pl" with a link is required when presenting results publicly; aggregate datasets are CC-BY 4.0.

License

MIT (this client and manifest). The NumerTel.pl service itself is a separate, proprietary product.


NumerTel MCP Server (po polsku)

Sprawdzaj polskie numery telefonów z poziomu dowolnego asystenta AI: kto dzwonił, czy to spam lub oszustwo, czy numer naprawdę należy do banku. Do tego bieżące wskaźniki nadużyć telefonicznych w Polsce.

Za serwerem stoi NumerTel.pl: 130 mln numerów na bazie oficjalnych zakresów UKE, opinie użytkowników, państwowy wykaz DNO i jawna Lista Ostrzeżeń CERT Polska.

Serwer zdalny (zalecany)

Jeden adres, zero instalacji:

Code
https://numertel.pl/api/mcp

Konfiguracja działająca w większości klientów MCP:

config.json
{
  "mcpServers": {
    "numertel": {
      "type": "http",
      "url": "https://numertel.pl/api/mcp"
    }
  }
}

W Claude Code wystarczy: claude mcp add --transport http numertel https://numertel.pl/api/mcp. Przyciski szybkiej instalacji dla Cursor i VS Code znajdziesz na górze strony. Transport: streamable HTTP (JSON-RPC 2.0). Limit: 30 zapytań dziennie na adres IP.

Zapytaj asystenta

  • „Kto dzwoniÅ‚ z numeru 500 100 200?"
  • „Czy 22 598 40 44 to prawdziwy numer banku, czy oszustwo?"
  • „Jaka jest dziÅ› skala phishingu w Polsce?"

Narzędzia

  • check_phone_number zwraca operatora (pierwotny zakres UKE z notÄ… o przenoÅ›noÅ›ci), etykietÄ™ ryzyka z opinii, status w wykazie DNO UKE (połączenie przychodzÄ…ce z numeru DNO jest z definicji sfaÅ‚szowane), wpis z BiaÅ‚ej Listy oficjalnych infolinii i liczniki zgÅ‚oszeÅ„. WejÅ›cie: number (string, 9 cyfr, +48 i spacje sÄ… usuwane). Tylko odczyt.
  • spam_weather zwraca bieżące wskaźniki nadużyć w Polsce: nowe domeny oszustów na LiÅ›cie OstrzeżeÅ„ CERT (dziÅ› / 7 / 30 dni) i rozmiar wykazu DNO. Bez parametrów. Tylko odczyt, dane otwarte (CC-BY).
  • find_official_number zwraca prawdziwy oficjalny numer banku, urzÄ™du lub operatora. Po nazwie instytucji (np. ZUS, mBank, NFZ) zwraca zweryfikowane numery z BiaÅ‚ej Listy ze źródÅ‚em i datÄ… weryfikacji. WejÅ›cie: institution. Tylko odczyt.
  • recent_scam_domains zwraca najnowsze domeny phishingowe z Listy OstrzeżeÅ„ CERT Polska, w zapisie defanged (evil[.]pl). WejÅ›cie: limit (1-50, domyÅ›lnie 15). Tylko odczyt, dane otwarte (CC-BY).

Wariant lokalny (stdio, jeden plik)

Dla klientów obsługujących wyłącznie stdio. Wymaga Node 18+. Pobierz numertel-mcp.mjs (plik jest też w tym repo):

config.json
{
  "mcpServers": {
    "numertel": {
      "command": "node",
      "args": ["/sciezka/do/numertel-mcp.mjs"],
      "env": { "NUMERTEL_API_KEY": "(opcjonalnie, wyzszy limit)" }
    }
  }
}

REST API

Read the full README →View source on GitHub →

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Frequently Asked Questions about Numertel

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "numertel": { "command": "npx", "args": ["-y", "numertel"] } }

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Technical Specs & Signals

Category💻Developer Tools
More technical detailsExpand â–¾
TransportSTDIO
RuntimeNode.js
Last updatedSep 7, 2026
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28Quality signal: Emerging · 28/100How this signal is calculated ▾
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Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership8/20
Documentation & tools12/30
Adoption & activity1/15
Community engagement0/10

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