Look up any domain instantly with the Domain WHOIS API. Get registrar, creation date, expiration date, nameservers, and status — all in clean JSON. Uses RDAP protocol (RFC 7480). Supports .com, .net, .org, .io and 10+ TLDs. Free tier: 5,000 requests/month. No API key. No registration. One GET request. Built on FastAPI. Runs 24/7. 9.2 rating on RapidAPI.