dns-lookup

DNS Lookup via MCP

Use this skill when you need to look up DNS records, perform reverse DNS, check WHOIS data, or verify nameservers. Zero auth required.

Available Tools

Tool	What it does
dns_lookup	Look up A, AAAA, MX, TXT, NS, CNAME, SOA, SRV, or PTR records
reverse_dns	Reverse DNS (PTR) lookup on an IP address
resolve_all	Resolve A, AAAA, MX, TXT, NS, CNAME in one call
check_nameservers	Get nameserver (NS) records for a domain
whois	Query WHOIS data (follows IANA referrals to registrar)

Workflow

1. For general domain investigation: start with resolve_all to see everything at once
2. For specific record types: use dns_lookup with the type parameter
3. For IP investigation: use reverse_dns to find the hostname
4. For domain ownership: use whois

Key Patterns

• dns_lookup with type: "MX" is the go-to for email delivery debugging
• resolve_all returns all common record types in one call — most efficient for initial investigation
• whois follows IANA referrals automatically, so it works for any TLD
• No API keys or auth needed — uses Node.js built-in DNS and public WHOIS servers