Domainr
API for instant domain availability checks and smart domain name suggestions across all TLDs.
| What is it | API for instant domain availability checks and smart domain name suggestions across all TLDs. |
|---|---|
| Pricing | Freemium |
| Free tier | Yes |
| Platform | API |
| API | Yes |
| Best for | integrating domain search into applications, monitoring critical domains for security |
| Domain registered | 2004 |
Data updated Aug. 1, 2026
What does Domainr do?
Domainr is a specialized API service that provides instant domain name availability checks and intelligent domain suggestions. It connects directly to domain registries through its ICANN-accredited status, delivering accurate results without false positives. The service checks availability across all major top-level domains and aftermarkets, returning results in milliseconds with premium pricing information when applicable.
The API offers per-keystroke search functionality that suggests relevant domain options as users type, helping them find available names even when their first choice is taken. It runs on Fastly's edge cloud platform, ensuring enterprise-grade reliability and performance. The service supports international domain names with full IDNA and Unicode compatibility, making it suitable for global applications.
Domainr is particularly valuable for developers building domain registration services, security teams monitoring critical domains for changes, and businesses that need to integrate domain search capabilities into their applications. It helps streamline the domain discovery process and provides reliable data for both commercial and security use cases.
Key features
What makes it stand outWho is Domainr for?
Who benefits most from this toolPricing
Free tier available — start without a credit cardDeveloper account
- Fastly Docs access
- Community support via support.fastly.com
Trust & presence
Gallery
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