Best Alternatives to Whois Monitoring APIs for 2025

As we move into 2025, the demand for reliable and efficient domain information retrieval has never been higher. Developers and businesses alike are seeking robust APIs that can provide accurate WHOIS data for domain management, cybersecurity, and various other applications. In this blog post, we will explore some of the top alternatives to the Whois Record Retrieval API, detailing their features, capabilities, and ideal use cases. Each API offers unique advantages, making them suitable for different needs in the domain information landscape.

1. Whois Record Retrieval API

The Whois Record Retrieval API offers real-time domain and IP information, aiding domain management, cybersecurity, and network administration. This API serves as a gateway to reveal the multifaceted aspects of a domain's digital identity, uncovering its historical journey, ownership, and intricate administrative details.

Key Features and Capabilities

One of the core features of the Whois Record Retrieval API is its ability to provide detailed domain information. To use this feature, you must indicate the URL of a domain in the parameter. The API returns a wealth of data, including:

• Domain Name: The name of the domain being queried.
• Registry Domain ID: A unique identifier for the domain in the registry.
• Registrar WHOIS Server: The server responsible for providing WHOIS information for the domain.
• Registrar URL: The website of the registrar.
• Updated Date: The last date the domain information was updated.
• Creation Date: The date the domain was originally registered.
• Expiration Date: The date the domain registration will expire.
• Registrar: The name of the registrar managing the domain.
• Domain Status: The current status of the domain (e.g., active, expired).

Example Response:

{
    "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": "2024-08-02T02:17:33+0000",
    "creation_date": "1997-09-15T07:00:00+0000",
    "registrar_registration_expiration_date": "2028-09-13T07:00:00+0000",
    "registrar": "MarkMonitor, Inc.",
    "domain_status": "serverDeleteProhibited"
}

This API is particularly useful for developers needing to manage domain portfolios, conduct cybersecurity assessments, or perform legal investigations.

Want to try the Whois Record Retrieval API? Check out the API documentation to get started.

2. Whois Information API

The Whois Information API is a powerful tool that provides complete and detailed information about the registration and ownership of a domain name. By accessing this API, users can obtain a wealth of data related to a specific domain, allowing them to gain valuable insights and make informed decisions.

Key Features and Capabilities

The primary feature of the Whois Information API is the ability to get domain information. To use this feature, users must enter the URL of a domain in the parameter. The API returns comprehensive data, including:

• Domain Ownership: Information about the individual or organization that owns the domain.
• Registration Dates: The creation and expiration dates of the domain.
• Registrar Details: Information about the registrar managing the domain.
• Contact Information: Details for domain administrators and technical contacts.

Example Response:

{
    "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": "2024-08-02T02:17:33+0000",
    "creation_date": "1997-09-15T07:00:00+0000",
    "registrar_registration_expiration_date": "2028-09-13T07:00:00+0000",
    "registrar": "MarkMonitor, Inc.",
    "domain_status": "serverDeleteProhibited"
}

This API is ideal for businesses looking to enhance their brand protection strategies and for developers needing to integrate domain data into their applications.

Want to try the Whois Information API? Check out the API documentation to get started.

3. WhoisJson - API

The WhoisJson API is a powerful and reliable service that provides real-time domain registration data for businesses, cybersecurity professionals, and developers. This API delivers accurate and up-to-date WHOIS information in a simple, easy-to-parse JSON format.

Key Features and Capabilities

One of the standout features of the WhoisJson API is its ability to provide domain information. This feature allows users to retrieve registration details for a domain name or an IP address. The API returns well-parsed and normalized data, which includes:

• Important Dates: Expiration and creation dates of the domain.
• Owner and Contact Information: Details about the domain owner and their contact information.
• Nameservers: The DNS servers associated with the domain.
• Registrar Information: Details about the registrar managing the domain.

Example Response:

{
    "server": "gamma",
    "name": "whoisjson.com",
    "status": ["clientDeleteProhibited", "clientTransferProhibited"],
    "nameserver": ["dns200.anycast.me", "ns200.anycast.me"],
    "created": "2016-12-01 11:28:12",
    "changed": "2023-12-01 05:12:54",
    "expires": "2024-12-01 11:28:12",
    "registered": true
}

This API is particularly useful for investigating online fraud, tracking domain registrations, and checking domain name availability.

Looking to optimize your WhoisJson API integration? Read our technical guides for implementation tips.

4. Domain Information API

The Domain Information API offers real-time domain registration insights, enhancing brand protection, cybersecurity, and business intelligence efforts seamlessly. This API provides a programmatic interface that enables users to access detailed information about domain registrations.

Key Features and Capabilities

The primary feature of the Domain Information API is the ability to get domain data. Users must indicate the URL of a domain in the parameters to retrieve comprehensive information, which includes:

• Domain Registration Status: Current status of the domain registration.
• Creation and Expiry Dates: Dates indicating when the domain was registered and when it will expire.
• Registrar Details: Information about the registrar managing the domain.
• Contact Information: Details for the domain's administrative and technical contacts.

Example Response:

{
    "status": true,
    "domain_name": "chateaullc.com",
    "query_time": "2024-07-14 15:44:42",
    "whois_server": "whois.verisign-grs.com",
    "domain_registered": "yes",
    "create_date": "2000-10-10",
    "update_date": "2024-02-06",
    "expiry_date": "2024-10-10",
    "domain_registrar": {
        "iana_id": "83",
        "registrar_name": "IONOS SE",
        "whois_server": "whois.ionos.com",
        "website_url": "http://ionos.com",
        "email_address": "[email protected]",
        "phone_number": "+1.8774612631"
    }
}

This API is essential for businesses looking to enhance their cybersecurity measures and for developers needing to integrate domain data into their applications.

Want to try the Domain Information API? Check out the API documentation to get started.

5. WhoIs Records API

The WhoIs Records API allows users to retrieve information about domain names and IP addresses, including the owner, contact information, and registration details. This data can be useful for a variety of purposes, such as verifying the ownership of a domain or tracking the use of an IP address.

Key Features and Capabilities

The WhoIs Scan feature of the WhoIs Records API allows users to retrieve information about a specific domain or IP address. Users simply need to provide the API with the domain or IP address they want to query. The API returns relevant information, including:

• Owner Information: Details about the owner of the domain or IP address.
• Contact Information: Administrative and technical contact details.
• Registration Details: Information about when the domain was created and when it will expire.

Example Response:

{
    "statusCode": 200,
    "body": "{\"domain_name\": [\"YAHOO.COM\", \"yahoo.com\"], \"registrar\": \"MarkMonitor, Inc.\", \"whois_server\": \"whois.markmonitor.com\", \"updated_date\": [\"2023-02-03-18-07-10\"], \"creation_date\": [\"1995-01-18-05-00-00\"], \"expiration_date\": [\"2024-01-19-05-00-00\"], \"name_servers\": [\"NS1.YAHOO.COM\", \"NS2.YAHOO.COM\"], \"status\": [\"clientDeleteProhibited\"]}"
}

This API is particularly useful for verifying domain ownership for transfers and checking contact information for potential purchases.

Looking to optimize your WhoIs Records API integration? Read our technical guides for implementation tips.

6. Domain Registrar Information API

The Domain Registrar Information API allows users to instantly retrieve complete domain registration information, including owner details. This API is essential for domain management and research.

Key Features and Capabilities

The Domain Information feature of this API allows users to indicate the URL of a domain in the parameter to retrieve comprehensive information. This includes:

• Domain Ownership: Information about the individual or organization that owns the domain.
• Registration Details: Information about when the domain was registered and when it will expire.
• Registrar Information: Details about the registrar managing the domain.
• Current Domain Status: The current status of the domain registration.

Example Response:

{
    "id": 56,
    "name": "google.com",
    "owner": "Google LLC",
    "registrar": "MarkMonitor, Inc.",
    "whois_server": "whois.markmonitor.com",
    "states": ["clientupdateprohibited", "clienttransferprohibited"],
    "name_servers": ["ns1.google.com", "ns2.google.com"],
    "creation_date": "1997-09-15 07:00:00",
    "expiration_date": "2028-09-13 07:00:00"
}

This API is particularly useful for businesses needing to manage domain portfolios and for developers integrating domain data into their applications.

Looking to optimize your Domain Registrar Information API integration? Read our technical guides for implementation tips.

7. Domain Checker API

The Domain Checker API reveals crucial domain details, from ownership to registration dates. This API enhances security, streamlines management, and keeps users informed effortlessly.

Key Features and Capabilities

The Domain Data feature of this API allows users to indicate the URL of a domain in the parameter to retrieve information about its availability and registration details. This includes:

• Domain Availability: Whether the domain is currently available for registration.
• Registration Dates: Information about when the domain was created and when it will expire.
• DNS Settings: Information about the DNS settings associated with the domain.

Example Response:

{
    "server": "gamma",
    "name": "yahoo.com",
    "status": ["clientUpdateProhibited", "clientTransferProhibited"],
    "created": "1995-01-18 09:00:00",
    "changed": "2023-12-18 10:09:50",
    "expires": "2025-01-19 06:00:00",
    "registered": true
}

This API is particularly useful for users looking to streamline the domain registration process and for developers creating applications that require domain availability checks.

Need help implementing Domain Checker API? View the integration guide for step-by-step instructions.

8. Domain Registration Status API

The Domain Registration Status API swiftly checks if desired domain names are available, streamlining the process for quick and informed registration decisions.

Key Features and Capabilities

The Domain Verifier feature of this API allows users to specify a domain URL in the parameter to check its availability. This includes:

• Domain Availability: Whether the specified domain name is available for registration.
• Time Elapsed: The time taken to check the domain's availability.

Example Response:

{
    "status": "Unavailable",
    "timeElapsed": 4
}

This API is essential for users looking to quickly determine domain availability and for developers needing to integrate domain registration checks into their applications.

Ready to test the Domain Registration Status API? Try the API playground to experiment with requests.

9. Domain Availability Checker API

The Domain Availability Checker API allows users to check the availability of a certain domain and retrieve its age as well, making it a valuable tool for domain registration.

Key Features and Capabilities

The Check Domain feature of this API allows users to pass the domain they want to check in the parameter. This includes:

• Domain Availability: Whether the specified domain is available for registration.
• Domain Age: Information about how long the domain has been registered.

Example Response:

{
    "example.org": false,
    "foo.com": false,
    "somefoobardomain.io": true
}

This API is particularly useful for developers creating platforms that help users find available domains and for conducting market research on domain availability trends.

Looking to optimize your Domain Availability Checker API integration? Read our technical guides for implementation tips.

10. Domain Expiration Checker API

The Domain Expiration Checker API allows users to check the expiration date of any domain name by simply providing the domain name. It returns the remaining days until expiration, making it easy to keep track of domains.

Key Features and Capabilities

The Get Expiration feature of this API allows users to check the expiration date of a given URL. This includes:

• Expiration Date: The date when the domain will expire.
• Domain Age: Information about how long the domain has been registered.
• Remaining Days: The number of days left until the domain expires.

Example Response:

{
    "domain": {
        "domain_url": "https://www.sunvalleyerp.com",
        "updated_at": "2025-03-11T22:34:30.000000Z"
    },
    "success": true,
    "domain_registration_data": {
        "domain_age_date": "2023-04-18",
        "domain_age_days_ago": 693,
        "domain_expiration_date": "2025-04-18",
        "domain_expiration_days_left": 37
    }
}

This API is particularly useful for businesses needing to monitor their domain registrations and for developers creating applications that require domain expiration tracking.

Need help implementing Domain Expiration Checker API? View the integration guide for step-by-step instructions.

Conclusion

In conclusion, as we look ahead to 2025, the landscape of domain information APIs is rich with options. Each of the APIs discussed offers unique features and capabilities that cater to different needs, whether it's for domain management, cybersecurity, or business intelligence. The Whois Record Retrieval API remains a strong contender, but alternatives like the Whois Information API, WhoisJson API, and others provide valuable tools for developers looking to enhance their applications with domain data. Depending on your specific requirements, one of these alternatives may serve as the best fit for your projects.