RDAP API vs urlscan.io - Domain API Comparison

Overview

RDAP API

RDAP-first domain, IP, and ASN lookup API

RDAP API centers on RDAP lookups for domains, IP ranges, and ASNs for teams that want structured registration data without buying a larger intelligence platform.

Trial access

urlscan.io

URL scanning, phishing analysis, and brand monitoring API

urlscan.io is built for scanning web pages, indexing observed infrastructure, and detecting phishing or brand abuse from captured page data.

Community plan available

Pricing Comparison

Pricing	RDAP API	urlscan.io
Free Tier	Trial access	Community plan available
Paid Plans	Usage-based API plans	Paid API and search plans
Enterprise	Higher-volume options	Business and enterprise options
TLD Coverage	RDAP-enabled registries	Scan corpus and search index coverage

Feature Comparison

Feature	RDAP API	urlscan.io
Free Tier	Limited	Included
API Access	Included	Included
Bulk Operations	Limited	Limited
Real-time Data	Included	Included
WHOIS Data	Included	Limited
DNS Lookup	Not Included	Included
Domain Valuation	Not Included	Not Included
Brand Monitoring	Not Included	Included
MCP/AI Integration	Not Included	Not Included

Which is Better?

Choose RDAP API if you need

Focused RDAP experience for domains, IPs, and ASNs
Cleaner fit for modern registration-data workflows
Good option for teams that do not need a huge platform

Choose urlscan.io if you need

Excellent page rendering and phishing investigation workflow
Strong brand-monitoring and search capabilities
Helpful for URL-centric security operations

Consider DomScan Instead

DomScan offers the best of both worlds with comprehensive features and developer-friendly pricing.

✓ Free tier: 10,000 credits/month (no credit card)
✓ 1,500+ TLDs supported
✓ MCP integration for AI assistants
✓ Domain valuation, brand monitoring, OSINT

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