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Domain API

The Domain API checks domain availability and retrieves basic registration information for any given domain.

For detailed domain registration information from the WHOIS protocol, check out our Whois API instead.

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From 7,638 users

4,400+

Applications using this API

API Status

Online - All Systems Operational

API Response Times

Average
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332ms373ms432ms628ms1047ms

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/v1/domain GET

https://api.api-ninjas.com/v1/domain

Returns domain availability status and registration details for a given domain name.

Parameters

  • domain  required

    Valid domain to check (e.g. example.com). For top-level domains other than .com, a premium subscription is required.

Headers

  • X-Api-Key  required

    API Key associated with your account.

Response

A JSON object with the following fields or an error if the request is unsuccessful.

  • domain

    The domain name that was checked.

  • available

    Whether the domain is available for registration (true or false).

  • creation_date

    Unix timestamp of when the domain was created (only present if available is false).

  • registrar

    Name of the registrar (only present if available is false).

Sample Request Live Demo!

domain

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https://api.api-ninjas.com/v1/domain?domain=example.com

Headers

X-Api-KeyLog in or sign up to get your API Key

Sample Response

JSON
{
    domain:"example.com",
    available:false,
    creation_date:808372800,
    registrar:"reserved-internet assigned numbers authority"
}

Code Examples

1 2 curl -X GET "https://api.api-ninjas.com/v1/domain?domain=example.com" \ -H "X-Api-Key: YOUR_API_KEY"

If your programming language is not listed in the Code Example above, you can still make API calls by using a HTTP request library written in your programming language and following the above documentation.

Frequently Asked Questions

  • Yes, but you must have a premium subscription. Commercial use of the Domain API is not permitted on the free tier. See our pricing page to choose a plan that fits your needs.
  • Sign up for a free account to instantly get your API key, then pass it in the X-Api-Key header on every request. The documentation above includes ready-to-run examples in cURL, Python, JavaScript, Node.js, and more.
  • Your API requests will simply be denied once you hit your monthly quota — you will never be charged more than the plan you signed up for. To increase your quota, you can upgrade your plan any time on our pricing page.
  • The API responds with a standard HTTP status code and a JSON error message describing the problem. See our error codes reference for the full list of codes and how to resolve each one, or contact support if you need help.
  • Send a GET request to the /v1/domain endpoint with the required domain parameter (e.g. domain=example.com). Note that checking top-level domains other than .com requires a premium subscription.
  • The response returns the domain that was checked and a boolean available field indicating whether it can be registered; when available is false, it also includes the creation_date (a Unix timestamp) and the registrar name. See the error codes page for unsuccessful requests.
  • It is ideal for building domain name search tools, registration/availability checkers, and brand-monitoring dashboards that need a quick yes/no availability answer plus basic registration details. For full WHOIS registration records, use the Whois API, and explore related tools like the DNS Lookup API and URL Lookup API.
  • The Domain API focuses on availability status and a few basic registration fields like creation_date and registrar, whereas the Whois API returns the detailed registration record from the WHOIS protocol. Browse all available endpoints on our APIs page.