MxToolBox vs RDAP API: API Comparison

Overview

MxToolBox

Email Security & DNS Diagnostic Tools

MxToolBox specializes in email deliverability tools including MX lookups, blacklist monitoring, SPF/DKIM/DMARC validation, and DNS diagnostics.

Free weekly blacklist monitoring for one domain

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.

Seven-day free trial on every plan

Pricing Comparison

Pricing	MxToolBox	RDAP API
Free Tier	Free weekly blacklist monitoring for one domain	Seven-day free trial on every plan
Paid Plans	$129/month Delivery Center	$9/month Starter plan
Enterprise	$399/month Delivery Center Plus	$199/month Business plan
TLD Coverage	All domains supported	RDAP-enabled registries

Feature Comparison

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

Which is Better?

Choose MxToolBox if you need

Best-in-class email diagnostics
Blacklist monitoring
SPF/DKIM/DMARC validation

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

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)
✓ 1,100+ TLDs supported
✓ MCP integration for AI assistants
✓ Domain valuation, brand monitoring, OSINT

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