Quien

quien Plugin

A better WHOIS lookup tool with JSON output and scripting subcommands.

Commands

Domain Lookup

• quien example.com — Domain WHOIS lookup (interactive TUI)
• quien --json example.com — JSON output for scripting

IP Lookup

• quien 8.8.8.8 — IP address lookup with reverse DNS, ASN, and abuse contacts

DNS Query

• quien dns example.com — DNS lookup with JSON output

Mail Audit

• quien mail example.com — Mail configuration audit (MX, SPF, DMARC, DKIM, BIMI with VMC chain validation)

TLS Query

• quien tls example.com — SSL/TLS certificate information

HTTP Query

• quien http example.com — HTTP headers and tech stack detection

SEO Analysis

• quien seo example.com — SEO analysis with Core Web Vitals (requires QUIEN_CRUX_API_KEY for field data)

Tech Stack

• quien stack example.com — Tech stack detection including WordPress plugins, JS/CSS frameworks

ASN Lookup

• quien ip <asn> — ASN lookup with PeeringDB enrichment

Usage Examples

• "Check WHOIS info for a domain"
• "Audit mail configuration for SPF, DKIM, DMARC"
• "Get SSL certificate details"
• "Find ASN and network info for an IP"
• "Analyze SEO and Core Web Vitals"

Installation

brew tap retlehs/tap
brew install retlehs/tap/quien

Key Features

• RDAP-first lookups with WHOIS fallback for broad TLD coverage
• IANA referral for automatic WHOIS server discovery
• Mail configuration audit — MX, SPF, DMARC, DKIM, and BIMI with VMC chain validation
• SEO analysis — indexability, on-page, structured data, Core Web Vitals
• Tech stack detection including WordPress plugins and JS/CSS frameworks
• IP lookups with reverse DNS, network info, abuse contacts, and ASN discovery via RDAP
• BGP fallback for origin ASN/prefix when RDAP does not include ASN data
• PeeringDB enrichment for ASN context
• JSON subcommands for scripting: dns, mail, tls, http, seo, stack, all