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ipv4.fr Network Tools

fr.ipv4/network-tools · v1.0.0

DNS, WHOIS, SSL, IP geolocation, email validation, DNSBL blacklist, HTTP headers, subnet calc.

Connect Remote server

Terminal
claude mcp add --transport http network-tools https://ipv4.fr/mcp --header "X-Api-Key: <X_API_KEY>"
~/.cursor/mcp.json
{
  "mcpServers": {
    "network-tools": {
      "url": "https://ipv4.fr/mcp",
      "headers": {
        "X-Api-Key": "<X_API_KEY>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "network-tools": {
      "type": "http",
      "url": "https://ipv4.fr/mcp",
      "headers": {
        "X-Api-Key": "<X_API_KEY>"
      }
    }
  }
}
Claude Desktop
Settings > Connectors > Add custom connector
URL: https://ipv4.fr/mcp

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools 9 found in our last check

  • dns_lookup

    DNS records for a domain (A, AAAA, MX, TXT, NS by default; also CNAME, SOA).

  • whois

    WHOIS registration data for a domain: registrar, creation and expiry dates, name servers.

  • ssl_check

    TLS certificate of a host: validity, issuer, expiry, days remaining, SAN.

  • ip_geolocation

    Geolocation of an IP address: country, city, ISP, coordinates, timezone.

  • email_validate

    Validate an email address: syntax, MX records, SMTP check, disposable and role-based detection.

  • ip_blacklist

    Check an IPv4 address against 3 DNS blacklists (Barracuda, SpamCop, UCEPROTECT).

  • http_headers

    HTTP response headers and status of a public URL (HEAD request, redirects followed and checked).

  • subnet_calc

    IPv4 subnet calculator from CIDR: network, broadcast, netmask, wildcard, host range, host count.

  • domain_audit

    AI security audit of a domain: DNS, SPF, DMARC, TLS, HTTP security headers, WHOIS expiry and IP blacklists, returned as a 0-100 score, findings by severity and exact fixes. Requires a paid ipv4.fr API key (X-Api-Key header); uses 10 requests of the daily limit. Without a key, pa…

Headers

NameDescription
X-Api-Key
Optional, secret
Optional ipv4.fr API key for higher limits (https://ipv4.fr/pricing). Without it: 20 free calls per day.

Details

Endpointhttps://ipv4.fr/mcp (Streamable HTTP)
First published24 Oct 2026
Last updated24 Oct 2026
Registry namefr.ipv4/network-tools

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