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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