Making requests | Documentation | Threat Intelligence API | WhoisXML API
Products APIs Data Feeds Web Tools Domain Research & Monitoring Enterprise Packages
WHOIS / WHOIS History
WHOIS / WHOIS History

Provide current and historical ownership information on domains / IPs. Identify all connections between domains, registrants, registrars, and DNS servers.

DNS / DNS History
DNS / DNS History

Look into all current and historical DNS / IP connections between domains and A, MX, NS, and other records. Monitor suspicious changes to DNS records.

IP Geolocation / IP Netblocks
IP Geolocation / IP Netblocks

Get detailed context on an IP address, including its user’s geolocation, time zone, connected domains, connection type, IP range, ASN, and other network ownership details.

Domain Research Suite (DRS)
Domain Research Suite (DRS)

Access our web-based solution to dig into and monitor all domain events of interest.

Domain Research Suite (DRS)
Domain Research Suite (DRS)

Get access to a web-based enterprise-grade solution to search and monitor domain registrations and ownership details for branded terms, fuzzy matches, registrants of interest, and more.

Research
Monitoring
White-Label
WhoisXML API Predictive Threat Intelligence
Predictive Threat Intelligence

Detect and block access to and from dangerous domain names before malicious actors can weaponize them. Contact us today for more information.

WhoisXML API Internet Infrastructure
Internet Infrastructure

Unlock integrated intelligence on Internet properties and their ownership, infrastructure, and other attributes.

Enterprise API Packages
Enterprise API Packages

Our complete set of domain, IP, and DNS intelligence available via API calls as an annual subscription with predictable pricing.

Security Intelligence (SI) Suite
Security Intelligence (SI) Suite

Offers complete access to WHOIS, IP, DNS, and subdomain data for product enrichment, threat hunting and more.

Multi-Level API User Administration Now Available - Manage individual API keys for team members in your organization.

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API docs Pricing
Making requests Output format Balance information Error codes Server-to-Server OAuth

Making requests

API endpoint

GET https://threat-intelligence.whoisxmlapi.com/api/v1?apiKey=YOUR_API_KEY&ioc=apple*.com
It takes up to a minute to activate your account after the registration.

Input parameters

apiKey

Required. Get your personal API key on the My products page.
ioc

Required. Search term: exact IoC value or wildcard search (*).

Examples:

  • Domain: apple-cl.us, apple*.com*, google*.com
  • URL: http://picture-file.com, *//*facebook*
  • IP: 95.255.128.27, 2602:fc05::29, 178.0.*
  • CIDR: 8.0.0.0/8, 178.0.0.0/16, 172.67.0.0/24
  • Hash: 930619bc49c9836d26a3a2b75a3db93934d26fcb

Domains, URLs, and IPs lookups support wildcards (*).
size

Optional. Number of possible results to return.

Acceptable values: 1 - 10000

Default: 100

Please note that every 100 results cost 1 API credit. The minimum cost of a query is 1 API credit. The maximum cost of a query is 100 API credits. If you set the size to 10,000, and the query returns 10,000 results, it will cost you 100 API credits.
outputFormat

Optional. Response output format.

Acceptable values: JSON | XML

Default: JSON

Free access

After Sign Up you automatically get a free subscription plan limited to 100 credits.

Usage limits and requests throttling

The maximum number of requests per second is 30. In case that the limit is breached, your subsequent requests will be rejected until the next second.

This API is also available with a dedicated load balancer and premium endpoint to enable faster querying as part of our Premium API Services and Enterprise API Packages.