AI TOOL PROFILE
WhoisXML API: Domain, WHOIS, IP, and DNS Intelligence
- Data and Analytics
- API Development
- Security Operations Centers (SOCs)
- Managed Security Service Providers (MSSPs)
- Brand Managers
- Cybersecurity Researchers
- Software Developers
Pricing
The service uses a freemium model with a free tier providing 500 API credits. Enterprise API packages are available as annual subscriptions; buyers should confirm current pricing on the vendor website.
At a glance
- Best for
- Security Operations Centers (SOCs), Managed Security Service Providers (MSSPs), Brand Managers, Cybersecurity Researchers, Software Developers
- Key use cases
- Brand Protection, Cyber Threat Intelligence, Incident Response and Forensics, Attack Surface Management
- Official website
- Visit whois api webservice official website

How AI is used
WhoisXML API is a data intelligence platform that provides information on domain ownership, DNS records, and IP geolocation. It is designed for users ranging from small business owners protecting a brand to enterprise security operations centers (SOCs) and law enforcement agencies.
The service supports cybersecurity tasks such as threat detection, attack surface management, and digital forensics. By providing real-time and historical data, it helps users identify connections between domains and registrants or track changes in DNS records over time.
Buyers should confirm whether they need a simple lookup tool or a full API integration. While the platform offers data feeds and predictive tools, the technical requirements are high, making some features more suitable for developers or security professionals.
Key Features
WHOIS and DNS APIs
Provides current and historical ownership information and DNS records for domains and IP addresses.
IP Geolocation and Netblocks
Delivers geographical data, time zones, and network ownership details for specific IP addresses.
Brand Alert API
Monitors recently registered and deleted domains for trademarked words or brand variations.
First Watch Predictive Intelligence
Uses a deep learning neural network to identify domains likely to become malicious shortly after registration.
Domain Research Suite
A web-based solution for searching and monitoring domain registrations and ownership details.
Data Feeds
Offers downloadable databases of WHOIS, DNS, and SSL certificates.
Use Cases
Brand Protection
Monitoring for typosquatting and impersonation attempts to help reduce the risk of phishing and trademark abuse.
Cyber Threat Intelligence
Enriching security platforms like SIEM or SOAR with internet data for threat contextualization.
Incident Response and Forensics
Using historical WHOIS and DNS records to help map out attacker infrastructure.
Attack Surface Management
Identifying digital assets and discovering potential vulnerabilities in DNS or SSL infrastructure.
FAQ
What is the First Watch API?
- It is a predictive tool that uses a neural network to identify domains likely to be malicious within hours of registration, before they are used in an attack.
Does WhoisXML API have a free version?
- Yes, they offer a free tier that includes 500 API credits and does not require a credit card to start.
Who is this software best for?
- It is designed for security platforms, MSSPs, SOCs, brand managers, and companies needing visibility into internet infrastructure.
Source category: Data & Analytics
Source subcategory: API Development
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