Domain Checker API

Domain Checker API

The Domain Checker API reveals crucial domain details, from ownership to registration dates. Enhance security, streamline management, and stay informed effortlessly.

About the API:  

The Domain Checker API emerges as a crucial tool in the domain industry, enabling enthusiastic users to streamline the process of finding and obtaining the perfect domain name. This API facilitates real-time checks to determine the availability status of a domain, providing a wealth of information that aids in the domain registration decision-making process.

In essence, the Domain Checker API simplifies the often complex and time-consuming task of searching for available domain names. By submitting a query with the desired domain name, users can quickly receive a response indicating whether the domain is currently available for registration or if it has already been taken.

One of the remarkable features of the Domain Checker API is its ability to handle bulk checks efficiently.

One of the main use cases for the Domain Checker API is the domain registration process. Users wishing to create a new website can quickly determine whether their preferred domain name is available for purchase. This function is crucial for branding, as it ensures that the chosen domain fits the identity and goals of the entity.

In conclusion, the Domain Checker API stands as a cornerstone in the domain registration ecosystem, offering a fast, efficient and reliable solution for checking domain name availability. Whether used for individual website creation, brand protection, market research or cybersecurity, the API provides a versatile and essential service for anyone navigating the dynamic online domain landscape. With its ability to handle bulk checks, real-time responsiveness and seamless integration capabilities, the Domain Checker API is a valuable asset for individuals and businesses alike.

What this API receives and what your API provides (input/output)?

It will receive parameters and provide you with a JSON.


What are the most common uses cases of this API?

  1. Domain Registration Platforms: Integrate the Domain Checker API into registration platforms to enable users to quickly check and secure desired domain names.

    Brand Name Selection: Businesses can use the API to ensure the availability of domain names aligned with their brand, streamlining brand identity establishment.

    Bulk Domain Checks: Domain registrars and resellers can efficiently assess the availability of multiple domain names simultaneously, aiding in portfolio management.

    Brand Protection: Regularly check for the availability of domains closely related to a brand to prevent unauthorized use and protect against cybersquatting.

    Market Research for Domain Investors: Domain investors can leverage the API to conduct market research, identifying valuable assets and strategic opportunities in the domain market.


Are there any limitations to your plans?

  • Basic Plan: 2,000 API Calls. 25 requests per minute.

  • Pro Plan: 4,000 API Calls. 25 requests per minute.

  • Pro Plus Plan: 8,000 API Calls. 25 requests per minute.

  • Premium Plan: 16,000 API Calls. 25 requests per minute.

API Documentation


To use this endpoint you must indicate the URL of a domain in the parameter.


Domain Data - Endpoint Features
Object Description
domain [Required]
Test Endpoint


                                                                                                                                                                                                                            {"server":"Alpha","name":"","idnName":"","status":["clientUpdateProhibited (","clientTransferProhibited (","clientDeleteProhibited (","serverUpdateProhibited (","serverTransferProhibited (","serverDeleteProhibited ("],"nameserver":["","","",""],"ips":"","created":"1997-09-15 07:00:00","changed":"2019-09-09 15:39:04","expires":"2028-09-14 04:00:00","registered":true,"dnssec":"unsigned","whoisserver":"","contacts":{"owner":[{"handle":null,"type":null,"name":null,"organization":"Google LLC","email":"Select Request Email Form at","address":null,"zipcode":null,"city":null,"state":"CA","country":"US","phone":null,"fax":null,"created":null,"changed":null}],"admin":[{"handle":null,"type":null,"name":null,"organization":"Google LLC","email":"Select Request Email Form at","address":null,"zipcode":null,"city":null,"state":"CA","country":"US","phone":null,"fax":null,"created":null,"changed":null}],"tech":[{"handle":null,"type":null,"name":null,"organization":"Google LLC","email":"Select Request Email Form at","address":null,"zipcode":null,"city":null,"state":"CA","country":"US","phone":null,"fax":null,"created":null,"changed":null}]},"registrar":{"id":"292","name":"MarkMonitor, Inc.","email":"[email protected]","url":"","phone":"+1.2086851750"},"rawdata":["\n   Domain Name: GOOGLE.COM\n   Registry Domain ID: 2138514_DOMAIN_COM-VRSN\n   Registrar WHOIS Server:\n   Registrar URL:\n   Updated Date: 2019-09-09T15:39:04Z\n   Creation Date: 1997-09-15T04:00:00Z\n   Registry Expiry Date: 2028-09-14T04:00:00Z\n   Registrar: MarkMonitor Inc.\n   Registrar IANA ID: 292\n   Registrar Abuse Contact Email: [email protected]\n   Registrar Abuse Contact Phone: +1.2086851750\n   Domain Status: clientDeleteProhibited\n   Domain Status: clientTransferProhibited\n   Domain Status: clientUpdateProhibited\n   Domain Status: serverDeleteProhibited\n   Domain Status: serverTransferProhibited\n   Domain Status: serverUpdateProhibited\n   Name Server: NS1.GOOGLE.COM\n   Name Server: NS2.GOOGLE.COM\n   Name Server: NS3.GOOGLE.COM\n   Name Server: NS4.GOOGLE.COM\n   DNSSEC: unsigned\n   URL of the ICANN Whois Inaccuracy Complaint Form:\n>>> Last update of whois database: 2023-12-18T16:07:24Z <<<\n\nFor more information on Whois status codes, please visit\n\nNOTICE: The expiration date displayed in this record is the date the\nregistrar's sponsorship of the domain name registration in the registry is\ncurrently set to expire. This date does not necessarily reflect the expiration\ndate of the domain name registrant's agreement with the sponsoring\nregistrar.  Users may consult the sponsoring registrar's Whois database to\nview the registrar's reported date of expiration for this registration.\n\nTERMS OF USE: You are not authorized to access or query our Whois\ndatabase through the use of electronic processes that are high-volume and\nautomated except as reasonably necessary to register domain names or\nmodify existing registrations; the Data in VeriSign Global Registry\nServices' (\"VeriSign\") Whois database is provided by VeriSign for\ninformation purposes only, and to assist persons in obtaining information\nabout or related to a domain name registration record. VeriSign does not\nguarantee its accuracy. By submitting a Whois query, you agree to abide\nby the following terms of use: You agree that you may use this Data only\nfor lawful purposes and that under no circumstances will you use this Data\nto: (1) allow, enable, or otherwise support the transmission of mass\nunsolicited, commercial advertising or solicitations via e-mail, telephone,\nor facsimile; or (2) enable high volume, automated, electronic processes\nthat apply to VeriSign (or its computer systems). The compilation,\nrepackaging, dissemination or other use of this Data is expressly\nprohibited without the prior written consent of VeriSign. You agree not to\nuse electronic processes that are automated and high-volume to access or\nquery the Whois database except as reasonably necessary to register\ndomain names or modify existing registrations. VeriSign reserves the right\nto restrict your access to the Whois database in its sole discretion to ensure\noperational stability.  VeriSign may restrict or terminate your access to the\nWhois database for failure to abide by these terms of use. VeriSign\nreserves the right to modify these terms at any time.\n\nThe Registry database contains ONLY .COM, .NET, .EDU domains and\nRegistrars.\n","\nDomain Name:\nRegistry Domain ID: 2138514_DOMAIN_COM-VRSN\nRegistrar WHOIS Server:\nRegistrar URL:\nUpdated Date: 2019-09-09T15:39:04+0000\nCreation Date: 1997-09-15T07:00:00+0000\nRegistrar Registration Expiration Date: 2028-09-13T07:00:00+0000\nRegistrar: MarkMonitor, Inc.\nRegistrar IANA ID: 292\nRegistrar Abuse Contact Email: [email protected]\nRegistrar Abuse Contact Phone: +1.2086851750\nDomain Status: clientUpdateProhibited (\nDomain Status: clientTransferProhibited (\nDomain Status: clientDeleteProhibited (\nDomain Status: serverUpdateProhibited (\nDomain Status: serverTransferProhibited (\nDomain Status: serverDeleteProhibited (\nRegistrant Organization: Google LLC\nRegistrant State/Province: CA\nRegistrant Country: US\nRegistrant Email: Select Request Email Form at\nAdmin Organization: Google LLC\nAdmin State/Province: CA\nAdmin Country: US\nAdmin Email: Select Request Email Form at\nTech Organization: Google LLC\nTech State/Province: CA\nTech Country: US\nTech Email: Select Request Email Form at\nName Server:\nName Server:\nName Server:\nName Server:\nDNSSEC: unsigned\nURL of the ICANN WHOIS Data Problem Reporting System:\n>>> Last update of WHOIS database: 2023-12-18T16:00:19+0000 <<<\n\nFor more information on WHOIS status codes, please visit:\n\n\nIf you wish to contact this domain’s Registrant, Administrative, or Technical\ncontact, and such email address is not visible above, you may do so via our web\nform, pursuant to ICANN’s Temporary Specification. To verify that you are not a\nrobot, please enter your email address to receive a link to a page that\nfacilitates email communication with the relevant contact(s).\n\nWeb-based WHOIS:\n\n\nIf you have a legitimate interest in viewing the non-public WHOIS details, send\nyour request and the reasons for your request to [email protected]\nand specify the domain name in the subject line. We will review that request and\nmay ask for supporting documentation and explanation.\n\nThe data in MarkMonitor’s WHOIS database is provided for information purposes,\nand to assist persons in obtaining information about or related to a domain\nname’s registration record. While MarkMonitor believes the data to be accurate,\nthe data is provided \"as is\" with no guarantee or warranties regarding its\naccuracy.\n\nBy submitting a WHOIS query, you agree that you will use this data only for\nlawful purposes and that, under no circumstances will you use this data to:\n  (1) allow, enable, or otherwise support the transmission by email, telephone,\nor facsimile of mass, unsolicited, commercial advertising, or spam; or\n  (2) enable high volume, automated, or electronic processes that send queries,\ndata, or email to MarkMonitor (or its systems) or the domain name contacts (or\nits systems).\n\nMarkMonitor reserves the right to modify these terms at any time.\n\nBy submitting this query, you agree to abide by this policy.\n\nMarkMonitor Domain Management(TM)\nProtecting companies and consumers in a digital world.\n\nVisit MarkMonitor at\nContact us at +1.8007459229\nIn Europe, at +44.02032062220\n--\n"],"network":null,"exception":null,"parsedContacts":true,"ask_whois":""}


curl --location --request GET '' --header 'Authorization: Bearer YOUR_API_KEY' 


API Access Key & Authentication

After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the Domain Checker API REST API, simply include your bearer token in the Authorization header.


Header Description
Authorization [Required] Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.

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To use this API, users must enter the URL of a domain to obtain data about the registry.

The Domain Checker API is a service that allows users to programmatically check the availability status of domain names in real-time. It provides a quick and efficient way to determine if a specific domain is available for registration.

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