Welcome To Our
Domain Age API
Our Domain Age API calculates and returns the age of a domain based on its original registration date, delivering clean JSON output across more than 1500 TLDs. Easily integrate with Python, JavaScript, PHP, Ruby, Java, and other programming languages. Below you can explore key features and implementation examples. Determining domain age with an API has never been easier.
15 years with you
whoapi.com was registered 14.02.2011
For over 15 years, WhoAPI has quietly powered products around the globe, through multiple tech cycles and industry shifts. From Fortune 500 companies to solopreneurs launching their next big idea, our APIs are trusted wherever reliable domain data matters.
Start building with WhoAPI today!
Domain Age API in M&A
A Domain Age API can be valuable in M&A when evaluating digital assets such as websites, SaaS products, or e-commerce brands. Domain age helps buyers verify the history and credibility of a business, identify potential risks like recently registered domains being sold as “established,” and support due diligence during acquisitions. Brokers, investors, and marketplaces can automatically check domain age at scale to validate listings, prioritize older and more trustworthy assets, and detect inconsistencies in seller claims.
FQDN
A Domain Age API is widely used in cybersecurity to evaluate the trustworthiness of Fully Qualified Domain Names (FQDNs) detected in network traffic, emails, or threat intelligence feeds. Security systems can automatically check the age of domains associated with an FQDN to identify suspicious behavior, as many phishing, malware, and command-and-control domains are newly registered. By flagging very young domains or subdomains linked to them, security teams can prioritize investigations, block malicious traffic faster, and strengthen automated threat detection systems.
Domain Age API for SEO
A Domain Age API is valuable in SEO analysis when evaluating the credibility and historical strength of a website. Older domains often carry more trust with search engines and may have accumulated backlinks, authority, and indexed content over time. SEO tools can automatically check domain age across large lists of domains to identify established sites, evaluate expired domain opportunities, analyze competitors, or detect newly registered domains attempting to rank quickly through aggressive SEO tactics.
Fraud & Risk Detection (Fintech / Payments)
Many fintech companies, payment processors, and marketplaces check the age of domains submitted by merchants or users. Newly registered domains are statistically more likely to be associated with scams, fake stores, or short-lived fraud operations. By using a Domain Age API, platforms can automatically score risk during onboarding or transactions—flagging merchants whose websites were registered only days or weeks ago. This helps reduce chargebacks, prevent phishing storefronts, and strengthen automated fraud detection systems.
Domain Age API Documentation
In our API documentation you can see the input and output parameters for our RESTful based Domain Age API. Read how you will setup input requests, API status codes and Description for Input Parameters. We have several different APIs, so it’s important to learn how to work with them separately. You can always contact our support, and we have dedicated how-to pages and code examples to assist you.
Code examples for Domain Age API
If you need help setting up your first API request then check code examples in PHP, Javascript, Ruby, Python, Objective C, C# (.NET) and Java. You will still have a lot of work ahead of you to build an entire application, but hopefully this will help you make the first step. Don’t forget to check our dedicated how-to pages and API documentation. Also our support team is standing by.
I am always on a lookout for obscure APIs and want to get my hands on them before everybody else. Same with WhoAPI, only I used the heck out of them!
Modest Inc.
Harper Reed
15 years with you
whoapi.com was registered 14.02.2011
For over 15 years, WhoAPI has quietly powered products around the globe, through multiple tech cycles and industry shifts. From Fortune 500 companies to solopreneurs launching their next big idea, our APIs are trusted wherever reliable domain data matters.
Start building with WhoAPI today!
