WhoisXML API WHOIS API vs WhoisJSON API

WhoisXML API WHOIS API9.2Visit WhoisJSON API8.8Visit

Higher score WhoisXML API WHOIS API #2 in WHOIS Lookup Tools 9.2/10 Free plan Free plan✓ 2 of 3 features Visit WhoisXML API

vs

WhoisJSON API #4 in WHOIS Lookup Tools 8.8/10 Free plan Free plan✓ 0 of 3 features Visit WhoisJSON

• WhoisXML API WHOIS API fits best

  API users needing broad lookup and integrations

• WhoisJSON API fits best

  API users needing WHOIS plus domain intelligence

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature	WhoisXML API WHOIS API 9.2/10 Visit ↗	WhoisJSON API 8.8/10 Visit ↗
At a glance
Editor score	9.2	8.8
Ranking	#2 in WHOIS Lookup Tools	#4 in WHOIS Lookup Tools
Best for	API users needing broad lookup and integrations	API users needing WHOIS plus domain intelligence
Pricing model	Free plan + paid	Free plan + paid
Starting price	Free plan	$10/mo
Free plan	✓	✓
Free trial	—	—
Deployment	Cloud	Cloud
Support	Email, Phone, Docs	Docs
Compliance	GDPR, PCI DSS	GDPR
Integrations	14 integrations	6 integrations
Built for	Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features WhoisXML API WHOIS API 2/3 · WhoisJSON API 0/3
Bulk lookup	✓ (best)	Not checked yet
Historical WHOIS	—	Not checked yet
RDAP support	✓ (best)	Not checked yet
Specs
API access	Full	Not checked yet
Monthly lookup limit	Not checked yet	Not checked yet
Export formats	JSON, XML	Not checked yet
Our review
Pros	Supports WHOIS, RDAP, or automatic protocol selection Returns parsed and raw data in JSON or XML Connects with security, data, and workflow platforms	Combines WHOIS, DNS, SSL, availability, and monitoring endpoints Adds subdomain discovery and email-domain signup risk scoring Supports JSON output with integrations for PHP, Python, and Node.js
Cons	Historical WHOIS is not included Bulk lookup uses a separate Bulk WHOIS API Paid access is handled through a contact form	It is an API service rather than a conventional API client XML support is limited to qualifying plans Higher-volume access requires moving through multiple paid tiers
Our verdict	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… Read the review →	WhoisJSON API is a hosted REST API for developers and businesses that need structured domain intelligence. Its endpoints cover WHOIS and RDAP registration lookups, DNS record resolution, SSL/TLS certificate validation, real-time domain… Read the review →

Strengths and trade-offs

• WhoisXML API WHOIS API — 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

• WhoisJSON API — where it wins

  • Combines WHOIS, DNS, SSL, availability, and monitoring endpoints
  • Adds subdomain discovery and email-domain signup risk scoring
  • Supports JSON output with integrations for PHP, Python, and Node.js

  Where it doesn't

  • It is an API service rather than a conventional API client
  • XML support is limited to qualifying plans
  • Higher-volume access requires moving through multiple paid tiers

• WhoisXML API WHOIS API9.2/10 · Free plan

  A broad lookup API with RDAP, parsed data, integrations, and a free tier.

  Visit WhoisXML APIFull verdict →
• WhoisJSON API8.8/10 · Free plan

  A focused domain-intelligence API with a free tier and plans from $10/month.

  Visit WhoisJSONFull verdict →