Domain and WHOIS APIs allow you to programmatically search for the availability of domain names and retrieve WHOIS information easily. You can use the APIs to query the database of various domain name registrars and know “who is” responsible for an online resource, such as a domain name or an IP address.
With the extensive availability of such APIs out there, it can be difficult to make the right decision on the best one to go for. Therefore, to help you in making a good choice, we assessed several domain and WHOIS look up APIs based on the following criteria:
- API features: We reviewed the key features of each of the APIs.
- Price: We looked at the cost of using each of the APIs, as provided on the Rakuten RapidAPI platform, which is the largest API marketplace in the world.
- Ease of use: We scrutinized the ease of integrating each of the APIs into applications.
Eventually, we created the following list of the top 10 best domain and WHOIS look up RESTful APIs:
- Whois Lookup API
- NetTools API
- Bulk WHOIS API
- Bulk Whois Data API
- Domaination.io API
- Name Toolkit API
- Whois API
- JSON Whois – Screenshot API
- WHOIS v2 API
- Domain Availability API
Table of Contents
Top 10 Best Domain and WHOIS Look Up APIs
TL;DR: Here’s a table summarizing our main findings.
|API||API Features||Pricing||Ease of Use|
|Whois Lookup API||Get WHOIS data in JSON or XML format||Free and paid plans of $8 or $15 per month||Easy|
|NetTools API||Query WHOIS data, resolve an IP address, resolve an host name, retrieve location information||Free and paid plans of $10 or $50 per month||Easy|
|Bulk WHOIS API||Get WHOIS data using either single domain query option or multiple domain query option||Free and a paid plan of $2 per month||Easy|
|Bulk Whois Data API||Perform large volume querying of WHOIS data and get results in JSON format||Free and varying paid plans from $14.99 to $149.99 per month||Easy|
|Domaination.io API||Check domain availability, get WHOIS data||Free and varying paid plans from $8 to $200 per month||Easy|
|Name Toolkit API||Get domain name suggestions, registration details, WHOIS data||Free and varying paid plans from $5 to $150 per month||Easy|
|Whois API||Check domain registrations, domain availability, detect credit card fraud, locate users geographically||Free||Easy|
|JSON Whois – Screenshot API||
Generate domain screenshot, get social data, create graphs, get WHOIS data
|WHOIS v2 API||Query WHOIS records, monitor domain registrations, locate users, detect fraudulent activities||Free||Easy|
|Domain Availability API||Check availability of a domain name for registration||Free||Easy|
The Whois API is a simple API that lets you look up for WHOIS data fast and smoothly.
API features: With the Whois Lookup API, you just need to specify a domain name and get back WHOIS data. It returns the contact details of the owner of the domain name, availability status, creation and expiry date, name server details, registrar details, and more. The API outputs data in JSON or XML format. The API also supports a wide range of RIRs (Regional Internet Registries) and TLDs (top-level domains).
Price: If you make less than 1,000 requests per month, you can use the API for free. Otherwise, you can pay $8 per month and get 15,000 requests or $15 per month and get unlimited requests.
Ease of use: There is easy to follow documentation to ensure you get started using the API as flawlessly as possible.
2. NetTools API
The NetTools API is a collection of tools that enable you to retrieve helpful information about your customers.
API features: The NetTools API lets you query WHOIS data by IP, AS, or domain name, resolve an IP address in DNS that is associated with a host, resolve an host name associated with an IP record, and retrieve the location information by resolving a DNS record or a public IP address.
Price: You can use the API for free, as long as you make less than 100 requests per day. Otherwise, you can pay $10 per month and make 10,000 requests or pay $50 per month and make unlimited requests.
Ease of use: There is simple documentation to assist you in ingesting the API with ease.
The Bulk WHOIS API provides you with an efficient way of gathering WHOIS data and knowing the status of an Internet resource.
API features: The Bulk WHOIS API checks WHOIS data using two modes: the single domain query option that is optimized for latency and the multiple domain query option that is optimized for throughput. With the API, you can get the creation and expiry date of domain names, registrar details, domain status, and other WHOIS information. It also supports all TLDs.
Price: You can make up to 43,200 requests per day for free, but each request is restricted to querying 15 domains. If you pay $2 per month, you can make up to 86,4000 requests per day and query 25 domains per request.
Ease of use: There is detailed documentation and example codes in various programming languages to ensure you get started within a few minutes.
The Bulk Whois Data API allows you to perform large volume querying of WHOIS information and get the data you want to implement in your use case.
API features: The Bulk Whois Data API provides reliable parsed WHOIS data in JSON format. After specifying a domain name or an IP address, you can get its WHOIS details and use the data in your application. You can carry out hundreds or thousands of WHOIS queries every day. The API also supports all TLDs, including the new gTLDs.
Price: The free version allows you to make 100 requests per month. Beyond the free plan, you can subscribe to any of its paid plans, which ranges from $14.99 per month to $149.99 per month.
Ease of use: With just a few lines of code, you can get started integrating the API simply and without any hassles.
The Domaination.io API is a simple API that you can use to check if a domain name is available as well as get other WHOIS data.
API features: With the Domaination.io API, you can get a lot of information about the specified domain name, including availability for registration, creation date, expiration date, domain grade, status, registrar details, and more. It also supports a wide range of TLDs.
Price: You can make 10,000 free requests per month using the API. To access higher request limits, you can go for any of its paid plans, which starts from $8.00 per month to $200.00 per month.
Ease of use: There is expansive documentation to ensure you get up and running with the API within a few minutes.
The Name Toolkit API allows users to get domain name suggestions, registration details, and other WHOIS information reliably and fast.
API features: With the Name Toolkit API, you can query a wide range of domain information, including Alexa rank, NsLookup details on the DNS servers, and WHOIS data. It also supports a wide range of TLDs.
Price: If you make less than 1,000 calls per month, you can use the API for free. Beyond the free plan, the paid plans range from $5.00 per month to $150 per month.
Ease of use: Getting started using the API is easy—there are integration samples in various programming languages you can modify to suit your use case.
7. Whois API
The Whois API lets you fetch comprehensive WHOIS data about Internet resources and integrate them into your application.
API features: With the Whois API, you can check domain registrations, assess availability of domain names, detect credit card fraud, locate users geographically, and more. It searches data only from the best WHOIs registrars with complete data. The API can also overcome the firewall-related problems that prevent access to WHOIS data. It returns data in XML or JSON format.
Price: The API is offered for free.
Ease of use: There is simple documentation to assist you in consuming the API with ease.
The JSON Whois – Screenshot API lets you generate a screenshot of a domain and retrieve a wide range of up-to-date WHOIS data.
API features: With the JSON Whois – Screenshot API, you can grab a screenshot of a domain, which you can display as a thumbnail or as is. It provides various types of social data, such as Google count, Twitter count, and Facebook count. Furthermore, the API allows you to create graphs, get information about a domain’s Alexa ranking, and fetch other important WHOIS information.
Price: It’s available for free.
Ease of use: There are code samples, response samples from the endpoints, and other references to make the API easy to consume.
9. WHOIS v2 API
The WHOIS v2 API comes with excellent features for querying the WHOIS records of domain names, IP addresses, and other online resources.
API features: The WHOIS v2 API allows you to monitor domain registrations, assess domain name availability, and locate users geographically. With the API, you can get registration address, registrar information, creation date, expiration date, updated date, and other information. It can be used for investigating and preventing cybercrime, detecting fraudulent activities, and performing competitor analysis. The data is returned in either XML or JSON well-parsed format.
Price: It’s provided for free.
Ease of use: There are usage examples in the popular programming languages, detailed documentation, and support to assist you in overcoming any obstacles in implementing the API.
The Domain Availability API allows you to check whether a domain is available for registration.
API features: With the Domain Availability API, you can accurately tell the availability of a domain name for registration. It returns the availability status, with both parsed fields and raw texts, in JSON and XML formats. The API supports all top-level domains. Furthermore, it is constantly updated to ensure users always get relevant information.
Price: Using the API is free of charge.
Ease of use: There is simple documentation to ensure you consume the API without any programming hurdles.
That’s Rakuten RapidAPI’s list of The Top 10 Best Domain and WHOIS Lookup APIs. We hope you’ll find the right API to integrate domain-related and WHOIS information into your application.
All the best!
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