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WhoisXML API WHOIS API

Freemium#2 of 27 in WHOIS Lookup Tools

WhoisXML API WHOIS API: A broad lookup API with RDAP, parsed data, integrations, and a free tier. Ranked #2 of 27 in WHOIS Lookup Tools by our editors (9.2/10); pricing: Free plan; best for API users needing broad lookup and integrations.

9.2/10Editor score

Visit WhoisXML API

WhoisXML API WHOIS API9.2 Visit WhoisXML API

At a glance

Editor score
9.2 / 10
Pricing
Free plan
Best for
API users needing broad lookup and integrations
Free plan
Yes
API access
Full
Facts checked
22 Sep 2026

Where it wins
- Supports WHOIS, RDAP, or automatic protocol selection
- Returns parsed and raw data in JSON or XML
- Connects with security, data, and workflow platforms
Where it doesn't
- Historical WHOIS is not included
- Bulk lookup uses a separate Bulk WHOIS API
- Paid access is handled through a contact form

Our verdict on WhoisXML API WHOIS API

WhoisXML API WHOIS API is a hosted REST service for retrieving registration data about domains, IPv4 and IPv6 addresses, and email addresses. It is aimed at developers, security teams, analysts, and workflows that need programmatic lookup rather than a standalone manual search page. GET and POST requests, API-key authentication, and server-to-server OAuth support common integration patterns, while JSON and XML responses fit downstream applications and data pipelines.

The published free access includes 500 queries or calls. Paid access is handled through a contact form, so the service is better suited to teams that can engage with the vendor for expanded access than to buyers comparing transparent self-serve tiers. Lookup coverage includes registrar, registrant, registry, dates, statuses, name servers, domain availability, raw text, and parsed WHOIS output. WHOIS, RDAP, or automatic protocol selection also gives users control over how records are retrieved.

Its ecosystem is a central strength. Listed integrations include Splunk, IBM QRadar, ServiceNow, Snowflake, Postman, Maltego, OWASP Amass, Sumo Logic, Pangea, Query, Logpresso, Cyware, ProjectDiscovery, and Malfors. Bulk lookup is available through the separate Bulk WHOIS API, supporting submitted lists of domains or IPs. Choose this service when broad API coverage, flexible response formats, and security or workflow integrations matter. An alternative is more suitable for buyers who require historical WHOIS records, a single bulk-lookup product, or publicly displayed paid-tier pricing.

Your product? Our editors can test WhoisXML API WHOIS API in depth and publish a review, labelled as paid · from $149/mo →

WhoisXML API WHOIS API pricing

Plans Free planFreemium A usable free plan; paid tiers unlock the limits above. Prices checked 22 Sep 2026.

See plans on whoisxmlapi.com

WhoisXML API WHOIS API fact sheet

Free plan	Yes
Paid from	Not verified
API access	Full
Bulk lookup	Yes
Historical WHOIS	No
RDAP support	Yes
Monthly lookup limit	Not verified
Export formats	JSON, XML
Deployment	Cloud
Platforms	Web
Compliance & security	GDPR, PCI DSS
Support	Email, Phone, Docs
Built for	Small business, Mid-market, Enterprise (editorial estimate)
Integrations	14 integrations: Splunk, IBM QRadar, ServiceNow, Snowflake, Postman, Maltego … See all →
Pricing	Free plan (source)
Website	whoisxmlapi.com
Facts checked	22 Sep 2026

WhoisXML API WHOIS API integrations

WhoisXML API WHOIS API lists 14 integrations on its own site.

Splunk
IBM QRadar
ServiceNow
Snowflake
Postman
Maltego
OWASP Amass
Sumo Logic
Pangea
Query
Logpresso
Cyware
ProjectDiscovery
Malfors

See all WhoisXML API WHOIS API integrations →

Alternatives to WhoisXML API WHOIS API

See all WhoisXML API WHOIS API alternatives →

WhoisXML API WHOIS API vs the competition

Compare WhoisXML API WHOIS API with any tool side by side →

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used WhoisXML API WHOIS API for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

WhoisXML API WHOIS API is listed in our WHOIS Lookup Tools directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update