The Domain Registered Checker API is a powerful tool that allows you to obtain detailed information about any domain registered on the internet. When you enter a domain, the API returns a structured response with key data such as availability (whether it is registered or not), its extension or TLD (such as .com, .org, .net), and the current status of the domain (for example, clientDeleteProhibited or clientTransferProhibited). It also includes registrar data, such as its name, URL, WHOIS server, and contact details for abuse reports.
The API provides important dates such as the domain creation date, last update date, and expiration date, along with a counter of days remaining until expiration. In addition, active nameservers are listed, making it easy to identify the current DNS provider (e.g., Cloudflare, GoDaddy, etc.).
The DNSSEC status, if enabled, and the DS data necessary to validate the security of the domain are also included. The response includes public WHOIS content, including legal texts, WHOIS service usage policies, and other data from the VeriSign database.
The API has been designed for use in domain monitoring platforms, availability verification, web infrastructure analysis, cybersecurity research, and digital brand management solutions.
To use this endpoint, you must specify a domain in the parameter.
{"domain":"google.com","keyword":"google","tld":"com","availability":"registered","status":["clientDeleteProhibited","clientTransferProhibited","clientUpdateProhibited","serverDeleteProhibited","serverTransferProhibited","serverUpdateProhibited"],"ns":["ns1.google.com","ns2.google.com","ns3.google.com","ns4.google.com"],"dates":{"created":"1997-09-15T04:00:00.000Z","updated":"2019-09-09T15:39:04.000Z","expiry":"2028-09-14T04:00:00.000Z","expiryDays":1147},"registrar":{"url":"http://www.markmonitor.com","name":"MarkMonitor Inc.","whois":"whois.markmonitor.com"},"contacts":{"registrant":{"name":null,"organization":null,"email":null,"phone":null,"street":null,"city":null,"postalCode":null,"state":null,"country":null},"admin":{"name":null,"organization":null,"email":null,"phone":null,"street":null,"city":null,"postalCode":null,"state":null,"country":null},"tech":{"name":null,"organization":null,"email":null,"phone":null,"street":null,"city":null,"postalCode":null,"state":null,"country":null},"billing":{"name":null,"organization":null,"email":null,"phone":null,"street":null,"city":null,"postalCode":null,"state":null,"country":null}},"whois":{"whois.verisign-grs.com":{"Domain Status":["clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited","clientTransferProhibited https://icann.org/epp#clientTransferProhibited","clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited","serverDeleteProhibited https://icann.org/epp#serverDeleteProhibited","serverTransferProhibited https://icann.org/epp#serverTransferProhibited","serverUpdateProhibited https://icann.org/epp#serverUpdateProhibited"],"Name Server":["NS1.GOOGLE.COM","NS2.GOOGLE.COM","NS3.GOOGLE.COM","NS4.GOOGLE.COM"],"text":["For more information on Whois status codes, please visit https://icann.org/epp","","NOTICE: The expiration date displayed in this record is the date the","registrar's sponsorship of the domain name registration in the registry is","currently set to expire. This date does not necessarily reflect the expiration","date of the domain name registrant's agreement with the sponsoring","registrar. Users may consult the sponsoring registrar's Whois database to","view the registrar's reported date of expiration for this registration.","","TERMS OF USE: You are not authorized to access or query our Whois","database through the use of electronic processes that are high-volume and","automated except as reasonably necessary to register domain names or","modify existing registrations; the Data in VeriSign Global Registry","Services' (\"VeriSign\") Whois database is provided by VeriSign for","information purposes only, and to assist persons in obtaining information","about or related to a domain name registration record. VeriSign does not","guarantee its accuracy. By submitting a Whois query, you agree to abide","by the following terms of use: You agree that you may use this Data only","for lawful purposes and that under no circumstances will you use this Data","to: (1) allow, enable, or otherwise support the transmission of mass","unsolicited, commercial advertising or solicitations via e-mail, telephone,","or facsimile; or (2) enable high volume, automated, electronic processes","that apply to VeriSign (or its computer systems). The compilation,","repackaging, dissemination or other use of this Data is expressly","prohibited without the prior written consent of VeriSign. You agree not to","use electronic processes that are automated and high-volume to access or","query the Whois database except as reasonably necessary to register","domain names or modify existing registrations. VeriSign reserves the right","to restrict your access to the Whois database in its sole discretion to ensure","operational stability. VeriSign may restrict or terminate your access to the","Whois database for failure to abide by these terms of use. VeriSign","reserves the right to modify these terms at any time.","","The Registry database contains ONLY .COM, .NET, .EDU domains and","Registrars."],"Domain Name":"GOOGLE.COM","Registry Domain ID":"2138514_DOMAIN_COM-VRSN","Registrar WHOIS Server":"whois.markmonitor.com","Registrar URL":"http://www.markmonitor.com","Updated Date":"2019-09-09T15:39:04Z","Created Date":"1997-09-15T04:00:00Z","Expiry Date":"2028-09-14T04:00:00Z","Registrar":"MarkMonitor Inc.","Registrar IANA ID":"292","Registrar Abuse Contact Email":"[email protected]","Registrar Abuse Contact Phone":"+1.2086851750","DNSSEC":"unsigned","URL of the ICANN Whois Inaccuracy Complaint Form":"https://www.icann.org/wicf/",">>> Last update of whois database":"2025-07-25T13:59:00Z <<<"}},"nameservers":["ns1.google.com","ns2.google.com","ns3.google.com","ns4.google.com"],"__notices":["field `ns` is deprecated and will be removed on 2026-01-01, use `nameservers` instead","field `dates.expiryDays` is deprecated and will be removed on 2026-01-01, use `dates.expiry` to infer it"]}
curl --location --request GET 'https://zylalabs.com/api/8738/domain+registered+checker+api/15264/domain+information&domain=Required' --header 'Authorization: Bearer YOUR_API_KEY'
| Header | Description |
|---|---|
Authorization
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[Required] Should be Bearer access_key. See "Your API Access Key" above when you are subscribed. |
No long-term commitment. Upgrade, downgrade, or cancel anytime. Free Trial includes up to 50 requests.
The API returns detailed information about a specified domain, including its registration status, TLD, registrar details, important dates (creation, update, expiration), active nameservers, DNSSEC status, and public WHOIS content.
Key fields include domain availability, TLD, registrar name and URL, creation and expiration dates, days until expiration, active nameservers, DNSSEC status, and WHOIS content, which provides legal and policy information.
The response is structured in a JSON format, with clearly defined fields for each data point. This allows for easy parsing and integration into applications, with sections for domain status, registrar info, and DNS details.
The primary parameter is the domain name you wish to query. Users must specify the domain in the request to receive the corresponding data. No additional parameters are required for basic queries.
Typical use cases include domain availability checks, monitoring domain status for cybersecurity, analyzing market trends in domain registrations, and managing digital brand assets by tracking domain ownership.
Data accuracy is maintained through regular updates from authoritative sources, including WHOIS databases and registrar information. The API aggregates data from multiple registrars to ensure comprehensive coverage.
Users can leverage the returned data for strategic planning, such as identifying available domains for purchase, monitoring competitors' domain registrations, and ensuring compliance with domain management policies.
Users can expect consistent data patterns, such as structured responses with clear fields for domain status, registrar info, and dates. If a domain is not registered, the API will explicitly indicate its availability.
To obtain your API key, you first need to sign in to your account and subscribe to the API you want to use. Once subscribed, go to your Profile, open the Subscription section, and select the specific API. Your API key will be available there and can be used to authenticate your requests.
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The free trial ends when you reach 50 API requests or after 7 days, whichever comes first.
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