Domainr
Domain search and status API for checking availability across TLDs
Domainr is a domain search tool and API owned by Fastly, Inc. that checks real-time domain availability, premium pricing, and aftermarket status across top-level domains. It solves the problem of finding and verifying domain names quickly, with per-keystroke search and context-aware suggestions that surface relevant alternatives when a preferred extension is taken.
The Fastly Domain Research API provides direct access to registry data for status checks, filtering by extension, registrar, location, or language, with IDNA and Unicode support. It includes an embeddable tag for integration with minimal code, and can monitor critical domains for status changes to support security and supply chain use cases. The service runs on Fastly's edge cloud platform and requires a Fastly API token.
Domainr is aimed at website builders, registrars, hosting companies, and apps that sell domains, as well as security providers managing software supply chains. It is also available as a standalone search tool for individuals finding names for projects. The API is a paid product, and Domainr earns commissions through partnerships with domain registries and brokers when domains are purchased.
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