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.
Limited free lookupsRDAP 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 accessPricing Comparison
| Pricing | MxToolBox | RDAP API |
|---|---|---|
| Free Tier | Limited free lookups | Trial access |
| Paid Plans | From $99/month | Usage-based API plans |
| Enterprise | Enterprise plans available | Higher-volume options |
| 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)
- ✓ 1,500+ TLDs supported
- ✓ MCP integration for AI assistants
- ✓ Domain valuation, brand monitoring, OSINT
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