WhoisJSON Editorial

Domain Intelligence Blog

Actionable guides on WHOIS, RDAP, DNS, SSL, and domain monitoring for developers and security teams.

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Whoxy Alternative: Why Developers Choose WhoisJSON for Domain Intelligence

Whoxy handles WHOIS well — but modern pipelines need DNS, SSL, subdomain discovery, and monitoring too. An honest comparison of Whoxy vs WhoisJSON: feature table, real pricing data, and a Python migration example.

WHOIS API for Attack Surface Management: Domain Intelligence at Scale

How to use domain intelligence APIs — WHOIS, DNS, SSL, subdomains — to automate attack surface management at scale. Typosquatting detection, registrant change alerts, and a full Python asyncio enrichment pipeline with risk scoring.

SSL Certificate Monitoring API: Track Expiry, Changes and Alerts Programmatically

Monitor SSL certificates programmatically with the WhoisJSON API. Detect expiry before it happens, track fingerprint changes for unauthorized replacements, and build automated alerts — with Python and Node.js code examples.

WhoisXML API Alternative: Why Developers Switch to WhoisJSON

A direct, honest comparison between WhoisXML API and WhoisJSON — pricing, response quality, included endpoints, what WhoisXML does better, and a 10-minute migration guide.

DNS Lookup API: Query Any Record Type Programmatically

How to query A, MX, TXT, DMARC, BIMI, MTA-STS, TLSRPT and more via a DNS REST API — with Node.js and Python examples for generic lookups, email security audits, and parallel multi-domain queries.

Bulk WHOIS Lookup: How to Query Multiple Domains at Once with an API

Controlled parallelisation, error handling, and plan selection for high-volume WHOIS workloads — with Node.js (p-limit) and Python (asyncio + aiohttp) code examples.

WhoisJSON is now available as an MCP server — use WHOIS & DNS in Claude, Cursor, and Windsurf

Query domain registration data, DNS records, SSL certificates, and domain availability directly from your AI assistant — no copy-pasting, no context switching. Setup in two minutes.

How to Detect Phishing Domains Programmatically: WHOIS, DNS, and SSL Signals

A practical guide for security engineers and threat intelligence teams. Detect phishing domains before they activate using domain age, registrant opacity, DNS anomalies, and SSL signals — with Python and Node.js API examples.

How to Check Domain Availability Programmatically (API Guide with Code Examples)

Why raw WHOIS and DNS checks fail at scale, and how to use a domain availability REST API instead. Complete guide with cURL, Python, and Node.js examples including bulk checking and rate-limit handling.

2026-04-05

11 min read

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