A
licenseNot graded
qualityC
maintenanceWHOIS/RDAP domain lookup, IP geolocation and Punycode conversion. 1400+ TLDs including IDN. Public remote server, no API key.
1
MIT
ipv4.fr Network Tools
by fr.ipv4
Server Details
DNS, WHOIS, SSL, IP geolocation, email validation, DNSBL blacklist, HTTP headers, subnet calc.
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- Status
- Healthy
- Uptime
- 100.0% over the last 24 hours
- Last Tested
- Transport
- Streamable HTTP · MCP 2025-11-25
- URL
- ChatGPT
- –
- Claude
- –
TDQS
A3.7/5.0
Scored across 9 tools
Disambiguation4/5
Each tool targets a distinct network diagnostic task (DNS, email, HTTP headers, blacklists, geolocation, TLS, subnet, WHOIS). The only overlap is domain_audit aggregating DNS/TLS/WHOIS/blacklist checks, but its composite audit/score purpose is clearly differentiated from the single-purpose tools.
Naming Consistency4/5
All names use consistent snake_case. Most follow a noun_verb pattern (dns_lookup, email_validate, ip_blacklist, ssl_check, subnet_calc), but a few are bare nouns (http_headers, ip_geolocation, whois), a minor deviation.
Tool Count5/5
Nine tools is well-scoped for a network diagnostics toolbox; each tool covers a distinct, useful operation with no filler.
Completeness4/5
The set covers core network diagnostics: DNS, WHOIS, TLS, email, HTTP headers, IP reputation, geolocation, subnet calculation, and an aggregate audit. Minor gaps like reverse DNS/PTR, ping, or traceroute exist but core workflows are well covered.
Available Tools
9 toolsdns_lookupBRead-onlyInspect
DNS records for a domain (A, AAAA, MX, TXT, NS by default; also CNAME, SOA).
Inputs: domain (required), types.
domain_auditARead-onlyInspect
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, pay per call with x402 (0.05 USDC on Base).
Inputs: domain (required).
email_validateARead-onlyInspect
Validate an email address: syntax, MX records, SMTP check, disposable and role-based detection.
Inputs: email (required).
http_headersARead-onlyInspect
HTTP response headers and status of a public URL (HEAD request, redirects followed and checked).
Inputs: url (required).
ip_blacklistARead-onlyInspect
Check an IPv4 address against 3 DNS blacklists (Barracuda, SpamCop, UCEPROTECT).
Inputs: ip (required).
ip_geolocationBRead-onlyInspect
Geolocation of an IP address: country, city, ISP, coordinates, timezone.
Inputs: ip (required).
ssl_checkBRead-onlyInspect
TLS certificate of a host: validity, issuer, expiry, days remaining, SAN.
Inputs: host (required), port.
subnet_calcARead-onlyInspect
IPv4 subnet calculator from CIDR: network, broadcast, netmask, wildcard, host range, host count.
Inputs: cidr (required).
Tool Schema Changelog
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Look up any domain, IP address or AS number: hosting, DNS, registration, email, TLS and headers.
Free DNS, SPF/DKIM/DMARC, TLS, WHOIS, IP/ASN, blocklist, ping, traceroute and port checks. No key.
WHOIS/RDAP, DNS, SSL, live subdomains with IPs, and SPF/DMARC/DKIM for any domain.
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- AlicenseAqualityCmaintenanceProvides comprehensive tools for real-time DNS queries across 53 record types, global propagation checks, and SSL certificate analysis. It also enables domain security scans for SPF/DKIM/DMARC configurations and HTTP uptime monitoring.889 npm23Apache 2.0
- AlicenseNot gradedqualityDmaintenanceProvides network utility tools including DNS lookup, WHOIS lookup, SPF record inspection, SSL/TLS certificate checking, and subnet/CIDR analysis powered by networkcalc.com services.1MIT
- FlicenseAqualityDmaintenanceProvides comprehensive DNS lookup capabilities including A, AAAA, MX, TXT, NS, SOA, CNAME, SRV, CAA, DNSSEC records, reverse DNS lookups, and bulk queries for multiple domains or IPs.4-
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