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Revolutionize Your Domain Search withWhoisFreaks Domain Availability API

Instantly check and verify domain availability to secure the perfect name for your brand or business.

1[
2  {
3    "domain": "whoisfreaks.com",
4    "domainAvailability": false
5  }
6]

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Eclipse WHOIS Stats

1528+

TLDs

690M+

Active Domains

877M+

Domains Tracked

3554M+

WHOIS Records

4931M+

Host Names

13B+

DNS Records

Our Products

Domain AvailabilityAPIs

Easily discover, monitor, and manage domain availability to maintain a competitive edge using our APIs.

Domain Availability Lookup

Domain Discovery Lookup

Domain Availability Lookup API

Use the Domain Availability Lookup API to instantly check domain availability across a wide range of TLDs. Customize the number of suggestions upto 100 to find the best options quickly and efficiently.

Domain Availability API

Product

Bulk Domain AvailabilityLookup

Enable you to retrieve deep domain intelligence instantly with a single query.

Bulk Domain Availability API

Use the Bulk Domain Availability Lookup API to check up to 100 domains across multiple TLDs, including custom TLD lists, in a single request. Quickly identify available names and apply custom result limits.

Bulk Domain Discovery API

Bulk Domain Discover API lets you submit up to 100 keywords per request and returns registered domains that contain each exact keyword. It searches across 800M+ domains spanning 1500+ TLDs and 9000+ SLDs for high-coverage results at scale.

Bulk Domain Availability API

Features

What ourDomain Availability APIsProvide

High-Precision Domain Availability Checks in Bulk Across Thousands of TLDs.

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Real Time Data

Delivers real-time domain availability results using live signals. Ideal for registrar integrations.

Domain Suggestions

Domain suggestions helps to generate up to 100 relevant domain ideas per request, based on the user’s input.

Bulk Domain Name Search

Check availability for up to 100 domains per request to accelerate validation and during bulk registrations.

Supported Formats

Get responses in JSON or XML format, for flexible data integrations in modern and legacy systems.

Domain Label Search

Easily check domain availability using keyword search with the Domain Taken API to find your perfect domain.

Advance Search & Filters

Use the Domain Taken API to search domains by label patterns and filter results by maximum label length for brand protection.

Database-Powered Search

Perform a reverse whois search to find domain ownership details linked to a specific company for threat mitigation.

Multi-Source Domain Check

Use a domain availability API powered by multiple trusted sources like WHOIS and DNS for availability checks.

Use Cases

Domain Availability in Action

Discover who uses the Domain Availability API and how they leverage it in their work to improve conversions.

Domain Registration Platforms

Platforms can bulk-check domain availability, enabling faster customer registrations to hit there targets.

Web Hosting Providers

Web hosting providers uses our API to check domain availability and enable seamless registration, so they can act fast.

Digital Agencies

Digital agencies can use the Our API to check domain availability and provide their clients personalized suggestions.

Brand Protection

Companies can use our API to generate domain ideas that are similar to their brand, to ensure their brand is protected.

Domain Investors

Domain investors can use the API to check domain availability and make informed investment decisions before anyone else.

Marketing Campaigns

Companies can use the API to generate unique domain name ideas for marketing campaigns and drive higher-quality leads.

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Seamlessly integrate our Domain Availability API and discover available domains instantly, enabling smarter domain registration.

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Documentation

Domain Availability Lookup

The Domain Availability API allows you to check whether a domain is available for registration. When the sug parameter is set to true, it can also provide up to 100 domain suggestions with different TLDs.

Authorization

You can make authorized requests to our API by passing API key as a query parameter. To get your API key, login to our billing dashboard and get your API key! If your API key has been compromised, you can change it by clicking on reset button in billing dashboard.

Query Parameters

Required

apiKey
Get your API key from our billing dashboard.
domain
The domain to check availability.

Optional

sug
For getting suggestions, it can be passed with or without a count. There are two possible values for sug: true or false. If you don't specify the sug parameter, the default value will be false.
count
If sug is true then count can be passed for desired number of suggestions. Default value of count is 5.
format
Two formats are available JSON, XML. If you don't specify the 'format' parameter, the default format will be JSON.

Request

SHELL

Loading request...

Response

Loading response...

Status Codes

Success Codes

200Request is processed successfully.

Failure Codes

400Please pass domain param correct value e.g. whoisfreaks.com, https://whoisfreaks.com, http://whoisfreaks.com
401Provided API key is invalid.
401Provided API key is inactive.
401Please buy a subscription plan or add api credits, then use this api key.
401Your subscription is deactivated. Please buy new plan or add api credits for using whoisfreaks APIs.
401Your subscription is deactivated due to much time payment failure. Please buy a new plan or add api credits for using whoisfreaks APIs.
401Your account is deactivated.
401You are blocked due to suspicious activity.
403We are not providing the whois of this domain extension (e.g., comsdf)
403Provided domain belongs to an inactive TLD. Please try to use historical whois lookup.
408Unable to fetch whois data. Please try again.
412You have exceeded the limit of api plan requests and your subscription is canceled.
413You have exceeded the limit of api credits requests [allowed_request_no]. Please upgrade your plan.
413You have exceeded the limit of Surcharge Requests [allowed_surcharge_request_no]. Please upgrade your plan.
429Please slow down. Your maximum request limit per minute is reached.
500Internal Server error occurred.
503Service is unavailable. Please try after some time.
504Request is timed-out.

Bulk Domain Availability Lookup

The Bulk Domain Availability API allows you to check the availability of up to 100 domains in a single request. You can also provide a custom list of TLDs to verify domain existence based on the specified domain label.

Authorization

You can make authorized requests to our API by passing API key as a query parameter. To get your API key, login to our billing dashboard and get your API key! If your API key has been compromised, you can change it by clicking on reset button in billing dashboard.

Query Parameters

Required

apiKey
Get your API key from our billing dashboard.

Optional

format
Two formats are available JSON, XML. If you don't specify the 'format' parameter, the default format will be JSON.

Request

SHELL

Loading request...

Response

Loading response...

Status Codes

Success Codes

200Request is processed successfully.
206Partial response, as an error occurred while processing the request.

Failure Codes

400Please provide domainNames in request body.
401Provided API key is invalid.
401Provided API key is inactive.
401Please buy a subscription plan or add api credits, then use this api key.
401Your subscription is deactivated. Please buy new plan or add api credits for using whoisfreaks APIs.
401Your subscription is deactivated due to much time payment failure. Please buy a new plan or add api credits for using whoisfreaks APIs.
401Your account is deactivated.
401You are blocked due to suspicious activity.
403We are not providing the whois of this domain extension (e.g., comsdf)
403Provided domain belongs to an inactive TLD. Please try to use historical whois lookup.
412You have exceeded the limit of api plan requests and your subscription is canceled.
413The requested list size is [GREATER_THAN_100] which exceeds the maximum list size of 100.
413You have exceeded the limit of Surcharge Requests [allowed_surcharge_request_no]. Please upgrade your plan.
429Please slow down. Your maximum request limit per minute is reached.
500Internal Server error occurred.
503Service is unavailable. Please try after some time.
504Request is timed-out.

Domain Discovery API

The Domain Discovery API searches the WhoisFreaks database to retrieve domains that contain a specific keyword or match a pattern (using an asterisk *). For each matched domain, it provides registration and inactive‑from dates. The API also supports the label_length parameter, which lets you control the maximum length of the domain label returned—for example, setting label_length=5 will return only domains with labels shorter than or equal to five characters.

Authorization

You can make authorized requests to our API by passing API key as a query parameter. To get your API key, login to our billing dashboard and get your API key! If your API key has been compromised, you can change it by clicking on reset button in billing dashboard.

Query Parameters

Required

apiKey
Get your API key from our billing dashboard.
keyword
Use this parameter to search for domain labels that match the specified keyword. Leave this parameter as null to enable use of the pattern parameter.
pattern
Use this parameter to search for domain labels that match a specific pattern. Apply the asterisk (*) as a wildcard for pattern matching — for example, whois*fres returns all domains containing both 'whois' and 'fres'. Leave this parameter as null to enable use of the keyword parameter.

Optional

label_length
Specify this parameter as a label length filter to retrieve all domains whose label length is less than or equal to the given value.
page
Specify page number to access specific page's data. If you don't pass 'page' parameter, default page is 1.

Request

SHELL

Loading request...

Response

Loading response...

Status Codes

Success Codes

200Request is processed successfully.

Failure Codes

400Please pass domain param correct value e.g. whoisfreaks.com, https://whoisfreaks.com, http://whoisfreaks.com
400Please provide one of the keyword or pattern, both are not acceptable
400Please provide keyword or pattern
401Provided API key is invalid.
401Provided API key is inactive.
401Please buy a subscription plan or add api credits, then use this api key.
401Your subscription is deactivated. Please buy new plan or add api credits for using whoisfreaks APIs.
401Your subscription is deactivated due to much time payment failure. Please buy a new plan or add api credits for using whoisfreaks APIs.
401Your account is deactivated.
401You are blocked due to suspicious activity.
408Unable to fetch whois data. Please try again.
412You have exceeded the limit of api plan requests and your subscription is canceled.
413You have exceeded the limit of api credits requests [allowed_request_no]. Please upgrade your plan.
413You have exceeded the limit of Surcharge Requests [allowed_surcharge_request_no]. Please upgrade your plan.
429Please slow down. Your maximum request limit per minute is reached.
500Internal Server error occurred.
503Service is unavailable. Please try after some time.
504Request is timed-out.

Bulk Domain Discovery API

Use the Bulk Domain Discovery API to retrieve domains from the WhoisFreaks database that contain specific keywords, with support for bulk searches of up to 10 keywords per request.

Authorization

You can make authorized requests to our API by passing API key as a query parameter. To get your API key, login to our billing dashboard and get your API key! If your API key has been compromised, you can change it by clicking on reset button in billing dashboard.

Query Parameters

Required

keywords
Specify a list of up to 100 keywords to retrieve all domain labels that are equal to any of those keywords.

Request

SHELL

Loading request...

Response

Loading response...

Status Codes

Success Codes

200Request is processed successfully.
206Partial response, as an error occurred while processing the request.

Failure Codes

400please provide data in request body.
401Provided API key is invalid.
401Provided API key is inactive.
401Please buy a subscription plan or add api credits, then use this api key.
401Your subscription is deactivated. Please buy new plan or add api credits for using whoisfreaks APIs.
401Your subscription is deactivated due to much time payment failure. Please buy a new plan or add api credits for using whoisfreaks APIs.
401Your account is deactivated.
401You are blocked due to suspicious activity.
408Unable to process request.
412You have exceeded the limit of api plan requests and your subscription is canceled.
413The requested list size is [GREATER_THAN_100] which exceeds the maximum list size of 100.
413You have exceeded the limit of Surcharge Requests [allowed_surcharge_request_no]. Please upgrade your plan.
429Please slow down. Your maximum request limit per minute is reached.
500Internal Server error occurred.
503Service is unavailable. Please try after some time.
504Request is timed-out.

FAQs

Enhance your apps with industry leading web scraping and crawling.

What is Domain Availability API?

What is the criteria for Domain Suggestions?

What is Bulk Domain Availability API?

What is the response time for Bulk Domain Availability API?

What is the number of free API credits available for new users, and are these credits rate-limited?

Do you have rate limiting on number of requests being made on your paid plans?

Do you provide any headers in API response regarding rate limiting?