API Tools

Compare DNS responses across 12 major public resolvers.

Test DNS-over-HTTPS and DNS-over-TLS provider connectivity and speed.

Convert between internationalized domain names (Unicode) and Punycode.

Query all common DNS record types for a domain in a single call.

Resolve DNS records for up to 100 domains in a single call.

Look up DNS records of any type for a domain.

Check DNS propagation across 20+ global resolvers.

Discover a domain's infrastructure — nameservers, MX hosts, and providers.

Check availability for up to 50 domains in a single call.

Check if a domain is available for registration.

Check if a domain is a disposable/temporary email provider.

Check a domain's registration date and calculate its age.

Discover subdomains via DNS brute-force of ~120 common prefixes.

Search keyword availability across 150+ TLDs.

WHOIS/RDAP lookup for up to 50 domains in a single call.

Look up domain registration details via RDAP.

Check an IP against ~30 DNS-based blacklists for spam and abuse.

Inspect a domain's SSL/TLS certificate — issuer, expiry, SANs, cipher suite.

Validate a domain's DNSSEC configuration and chain of trust.

Comprehensive DNS health audit with scoring and letter grade.

Detect typosquatting domains using permutation techniques.

Test for DNS zone transfer (AXFR) vulnerability on all nameservers.

Build a company profile from a domain — title, description, social links, tech.

Parse raw HTTP headers into structured key-value pairs with content-type analysis

Scan common TCP ports to check which services are accessible.

Follow the full HTTP redirect chain for any URL.

Grade HTTP security headers — HSTS, CSP, X-Frame-Options, and more.

Detect web server technology, stack, and security headers from HTTP headers.

Decompose URLs into scheme, host, port, path, query parameters, and fragment

Look up ASN, network prefix, organization, ISP, and geolocation for an IP.

Calculate subnet details from CIDR notation – network, broadcast, host range, and more

Reverse DNS (PTR) lookup with IP intelligence — hostname, geo, ASN, org.

Analyze Certificate Authority Authorization records for a domain.

Generate correctly formatted SPF, DMARC, MTA-STS, BIMI, and TLS-RPT records.

Benchmark authoritative nameserver response times.

Check for TLSA records — DNS-based certificate pinning (DANE).