WhoisJSON Editorial

Domain Intelligence Blog

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

17Articles

4Topics

FreeAccess

What Happens When a Domain Expires — And How to Detect It Programmatically

A complete guide to the domain expiry lifecycle — grace period, redemption, pending delete — and how to detect each stage using EPP status codes and the WhoisJSON API.

Free WHOIS API — Best Options in 2026

A practical comparison of the best free WHOIS API options in 2026. Covers free tier details, credit card requirements, TLD coverage, RDAP support, and ready-to-use curl, Python, and Node.js code examples.

WHOIS API JSON Response: Complete Field Reference & Examples

Every field in the WhoisJSON API response explained with real examples. Covers core fields, RDAP enrichment objects (age, expiration, statusAnalysis, nsAnalysis), edge-case handling in JS and Python, and practical use cases.

WhoisJSON vs WhoisXML API vs Whoxy: Which WHOIS API in 2026?

An honest comparison of WhoisJSON, WhoisXML API, and Whoxy. We compare pricing models, TLD coverage, RDAP support, and which service fits your use case.

How to Query WHOIS Data in Python Using a REST API (2026 Guide)

Step-by-step guide to querying WHOIS data in Python with the requests library. Covers bulk lookups, async with aiohttp, error handling, and a real-world newly-registered domain detection use case.

How to Query WHOIS Data in Node.js Using a REST API (2026 Guide)

Step-by-step guide to querying WHOIS data in Node.js with native fetch. Covers bulk lookups, error handling with AbortController, and a real-world phishing detection use case.