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Top Domain Registrar APIs

Use the APIs in this collection to research domain names and their availability.

Related APIs

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About This Collection

What are Domain Name Checker APIs?

Domain Name Checker APIs can be used to research website domain names and their availability. Some Domain APIs also provide other information, like domain reputation.

Are Domain Name Checker APIs Free?

Pricing varies depending on the API. For example, Domain Availability Checker is only $1 per month for unlimited calls. Domainr is free up to 10000 calls per month. Domain tools API has a tiered pricing plan, so you can choose which subscription level is best for you.

The Domain Checker APIs

Be sure to browse the APIs in this collection to find the best Domain Checker API for your application or website.
All of these APIs are available in multiple popular SDKs including:

  • Python
  • PHP
  • Node.js / JavaScript
  • cURL
    And many more!

How to Get Started

Sign up today for a free RapidAPI Account to begin testing and using the APIs in this collection (and many more!)

Install SDK for (Node.js)Unirest

OAuth2 Authentication
Client ID
Client Secret
OAuth2 Authentication