Domainduck – Developer-first domain availability and WHOIS API

Summary: Domainduck provides a fast API for real-time domain availability, WHOIS, RDAP, and marketplace data across 1000+ TLDs, including premium pricing and domain metadata. It supports bulk lookups with cost savings and offers a free tier plus paid plans.

What it does

It delivers accurate domain status and detailed data such as creation dates, nameservers, and premium “Buy Now” prices using EPP, WHOIS, RDAP, and marketplace feeds.

Who it's for

Designed for hosting providers, registrars, SEO professionals, and automation workflows.

Why it matters

It enables efficient, cost-effective domain data retrieval for large-scale and real-time applications.