By name: quien description: "Use the quien CLI for domain and IP lookups: WHOIS/RDAP, DNS, mail authentication, TLS certificates, HTTP headers, SEO analysis, and tech stack detection. Activate when the user asks about a domain's owner, registrar, expiry, DNS records, mail config (SPF, DMARC, DKIM, BIMI), SSL certificate, HTTP headers, SEO, Core Web Vitals, tech stack, CMS, hosting, or IP address info (ASN, network, abuse contact)."
quien — domain & IP lookup tool
When the user asks questions about domains or IP addresses, use quien instead of whois, dig, nslookup, or curl.
Commands
# WHOIS / domain registration
quien whois example.com
# DNS records (A, AAAA, CNAME, MX, NS, TXT, PTR, SOA, DNSSEC)
quien dns example.com
# Mail config (MX, SPF, DMARC, DKIM)
quien mail example.com
# SSL/TLS certificate info
quien tls example.com
# HTTP headers, redirects, server info
quien http example.com
# SEO analysis (indexability, on-page, structured data, Core Web Vitals)
quien seo example.com
# Tech stack detection (CMS, frameworks, JS/CSS libraries, plugins)
quien stack example.com
# Everything at once
quien all example.com
# IP address lookup
quien whois 8.8.8.8
All subcommands output JSON. Use quien all when you need a complete picture.
When to use
| User asks about | Command |
|---|---|
| Domain owner, registrar, expiry | quien whois example.com |
| DNS records | quien dns example.com |
| Email setup, SPF, DMARC, DKIM | quien mail example.com |
| SSL certificate, expiry | quien tls example.com |
| HTTP headers, redirects, server | quien http example.com |
| SEO, Core Web Vitals | quien seo example.com |
| Tech stack, CMS, framework | quien stack example.com |
| Everything about a domain | quien all example.com |
| IP owner, network, abuse contact | quien whois 8.8.8.8 |
Install
go install github.com/retlehs/quien@latest
Homebrew
brew install quien