Products APIs Data Feeds Web Tools Domain Research & Monitoring Enterprise Packages AI Deep Research
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.

New gTLD Intelligence Services (NGIS)
New gTLD Intelligence Services (NGIS)

Independent, evidence-based DNS and abuse intelligence for applicants, advisors, governments, and counsel participating in the ICANN 2026 New gTLD Program.

Research
Monitoring
White-Label
Predictive Threat Intelligence Feeds
Predictive Threat Intelligence Feeds

Predictive threat intelligence is your best first line of defense. Subscribe to the feeds to strengthen your cybersecurity posture. 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.

Attack Surface Discovery API
Attack Surface Discovery API

Uncover entire attack surfaces with this API to embed asset discovery, vulnerability scanning, and technology metadata into your platform. Now in early access.

MCP Server
MCP Server

Talk to our APIs using LLMs. Connect your preferred LLM to WhoisXML API and simply chat about WHOIS, DNS, threat intelligence, and more.

Jake AI
Jake AI

I’m your Domain Intelligence Assistant. I make it easy to explore WHOIS, DNS, and threat data from WhoisXML API — I’m cloud-based, fast, and always ready to help.

WhoisXML API Domain Intelligence Advisor (via ChatGPT)
WhoisXML API Domain Intelligence Advisor (via ChatGPT)

A custom GPT for WHOIS, DNS, IP, and threat intelligence research. Connects ChatGPT directly to WhoisXML API to enable fast, conversational investigations and domain insights.

NEW

One Universal API Credit Pool

Simplify API credit purchasing and usage with one balance that works across our product portfolio.

Start from $129/month
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API docs Integrations 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.

Postman collection

Postman is a desktop and web application that allows you to make requests to an API from a graphical user interface. We recommend using Postman with WhoisXML APIs endpoints when exploring the APIs functionality, as well as when you are troubleshooting issues with your application.

The WhoisXML API Postman collection is available at the following links:

The collection includes a preconfigured environment. You will need to set up the api_key variable to fire each request. Get your personal API KEY on the My products page. If you have questions related to the API, contact us.

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.