Part of the RST intelligence layer
RST Whois API
Unified, real-time WHOIS data from registrars worldwide — normalised into simple JSON, with raw responses available too. Judged live, not from a cache.
Domain age is often the strongest single signal on a young phishing domain.
Domain intelligence — raw and parsed Whois, one API.
Key Usage
Phishing investigations
SPAM investigations and e-mail security
FRAUD detection
Tracking domain registration information and checking domain name availability
Researching web infrastructure, locating geo positions
What makes us different
Сomprehensive unified API which you can use from any platform, system or security tool
Real-time whois data for any domain in a ready-to-use unified format (JSON)
No query rate limits from registrars
Keeping your requests private by proxying them on behalf of our service
Flexible pricing policy with a low initial entry cost
Usage Examples
Use in the Antispam solution to assess the reliability of the domain - lifetime, availability of registration data, etc.
Use by SOC experts during investigating a suspected incident to obtain detailed data about a domain.
Checking the existence/availability of a domain name for various purposes (OSINT and brand protection, search for phishing resources, investment analysis of domain names, etc.).
Banks and financial companies to prevent fraud - checking discrepancies in customer information and preventing intruders.
Marketing research, market, sales and other big data analytics.
RST WHOIS API
Explore the capabilities of the RST Whois API service, which provides essential domain details including creation date, last update date, expiration date, registrar information, domain age, current status, registration status, raw Whois records, and nameserver details. Access this data in real-time using an API key and receive it in a convenient JSON format for easy integration into your applications. Perform Whois lookups at any rate without concerns about bans.
{
"status": "registered",
"registered?": "true",
"created_on": "2022-01-01 00:00:00",
"updated_on": "2022-01-01 00:00:00",
"expires_on": "2023-01-01 00:00:00",
"age": 365,
"registrar": "Registrar Name",
"registrant": "Registrant Name",
"registrant_org": "Registrant Organisation",
"registrant_email": "Registrant Email",
"nameservers": "ns1.domain.com,ns2.domain.com"
}Registration data an agent can actually parse
Whois is often the first context an analyst — or an automated workflow — needs about a domain, and it is notoriously inconsistent between registrars. RST Whois API returns both the raw response and a parsed, normalised form over a single API, so the messy part is already handled.
Part of the same layer as the rest: consistent shape in, consistent shape out.