All Comparisons
DOMAIN DATA APIS September 11, 2026 · WhoisXML API: 95K/mo organic
DomainScan
vs
WhoisXML API

DomainScan vs WhoisXML API — Free Alternative for Domain & DNS Data

WhoisXML API sells structured WHOIS, DNS, IP, and threat intelligence data via a pay-per-call API — 44 endpoints, granular pricing, enterprise contracts. DomainScan bundles a similar API into flat plans with AI-generated analysis and an MCP endpoint for AI agents.

Verdict
WhoisXML wins on breadth of specialized endpoints (44+), historical WHOIS depth, and enterprise-grade SLAs for pure data resellers. DomainScan wins on flat pricing, unified JSON envelope across all tools, Prism AI remediation, and MCP-native access — the stronger choice for developers who want intelligence, not just raw records.

WhoisXML API has been in the domain-data-as-a-service business since 2010. Their catalog covers WHOIS lookups, reverse WHOIS, DNS records, IP geolocation, subdomain enumeration, threat intelligence feeds, and passive DNS — 44 endpoints, sold by the credit. If you’re an enterprise SOC or a threat-intelligence platform buying wholesale data, they’re a solid choice.

For most developers building on top of a domain-intelligence API, though, WhoisXML’s pricing model is confusing: different endpoints have different credit costs, some data types require enterprise contracts, and cost prediction is hard. DomainScan takes the opposite approach — a single JSON envelope across every tool, flat monthly plans, plus AI analysis wired in.

Feature Comparison

FeatureDomainScanWhoisXML API
WHOIS + RDAP lookup✅✅
Historical WHOIS recordsLimited✅ (10+ years)
Reverse WHOIS❌✅
DNS record queries (A, MX, TXT, etc.)✅✅
DNS propagation checking✅❌
Passive DNSLimited✅
SPF / DKIM / DMARC validation✅Partial
SSL certificate analysis✅Partial
Security headers audit✅❌
Blacklist / RBL checking✅✅
Subdomain enumeration✅✅
Threat intelligence feedsLimited✅ (bulk)
AI-generated analysis✅ (Prism AI)❌
MCP endpoint for AI agents✅❌
Pricing modelFlat plansPer-credit
Free tierYes500 free credits

Where WhoisXML wins

  • Historical WHOIS depth. 10+ years of archived WHOIS records — essential for threat intelligence, domain-attribution research, and litigation support.
  • Reverse WHOIS. Search domains by registrant email, name, or phone. Genuinely unique capability.
  • Passive DNS. Full historical DNS resolution data for threat hunting.
  • Enterprise scale. Bulk-data resellers, threat-intel platforms, and CTI teams get dedicated feeds.

Where DomainScan wins

  • Unified JSON envelope. Every tool returns the same response shape. Write the parser once, use it across all endpoints.
  • Flat plans, no credit math. Predictable monthly cost, no per-call cost anxiety.
  • AI analysis wired in. Prism AI reads the raw data and returns plain-English diagnosis + specific fix instructions — WhoisXML gives you the data, you write the analysis.
  • MCP native. Any AI agent (Claude, Cursor, ChatGPT with MCP) can call DomainScan tools directly. WhoisXML is REST-only.
  • Full domain-security coverage. DNS + SSL + email auth + headers + blacklist + monitoring in one platform. WhoisXML sells the data; DomainScan sells the insight.

Bottom line

If you’re building a threat-intelligence platform, running domain-attribution research, or need decade-scale historical WHOIS at bulk pricing, WhoisXML API is the specialized answer. If you’re building a product, an agent, or an internal tool that needs “is this domain healthy?” — DomainScan gives you that answer plus the fix, in one call, at one price.

Try It Now

Run a live scan on whoisxmlapi.com — see how the domain-data giant configures its own DNS, SSL, and email authentication.

Check the WHOIS glossary entry, the RDAP entry, and read the DomainScan API + MCP guide.

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