Skip to main content
Whois
Whois
20 actions · 1 auth method
PreviewAccount

​
Authentication

API Key

Uses a single account API key shared across every WhoisXML product, passed as a query parameter (or in the request body…Guides: Connector Profile, Link Account
Actions
20 actions
Action
Description
Get Account Balance
Get the remaining API credits for each subscribed product.
WHOIS Lookup
Get the WHOIS record for a domain or IP.
WHOIS History
Get the historical WHOIS records for a domain.
DNS Lookup
Get DNS records for a domain.
Check Domain Availability
Check whether a domain is available for registration.
Subdomains Lookup
Discover subdomains for a domain.
Domain Reputation
Get the reputation score for a domain.
SSL Certificates Lookup
Get the SSL/TLS certificate chain for a domain.
Website Categorization
Get the content categories for a domain.
Verify Email
Verify an email address.
IP Geolocation
Get geolocation and network data for an IP address.
IP Netblocks Lookup
Get the netblock (IP range) records that an IP, ASN, or organization belongs to.
Reverse WHOIS Search
Find domains matching WHOIS record search terms.
Reverse NS Lookup
Find domains served by a name server.
Reverse MX Lookup
Find domains using a mail server.
Reverse IP Lookup
Find domains hosted on an IP address.
Brand Alert
Find newly registered or dropped domains matching brand terms.
Registrant Alert
Find newly registered or dropped domains matching registrant terms.
Capture Website Screenshot
Capture a screenshot of a web page.
Threat Intelligence Lookup
Look up threat intelligence for an indicator of compromise.

​
Getting Started

1

Create or Select a Project

Set up a new project or select an existing one. See Organizations & Projects.
2

Configure the Connector

Enable the connector and set up a connector profile in your project. See Managing Connectors.

Connector Profile

Whois - API Key
3

Link an Account

Connect an account using StackOne Hub or Auth Link.

Link Account

Whois - API Key
4

Use Actions

Invoke actions using one of the methods below:
  • MCP – Model Context Protocol for AI assistants
  • A2A – Agent-to-Agent protocol
  • Agent SDK – TypeScript and Python SDKs for AI agents
  • Actions RPC – Direct API calls
  • Playground – Test actions in the dashboard