Overview
WhoAPI
Established Domain Availability & WHOIS API
WhoAPI provides domain availability checking and WHOIS lookup APIs with a focus on accuracy and bulk operations.
10,000 welcome creditsWHOISJSON
WHOIS, DNS, SSL, and availability API with a lightweight free plan
WHOISJSON packages WHOIS, DNS, SSL certificate, and availability lookups into a lightweight API for teams that need practical lookup coverage without enterprise overhead.
Free plan availablePricing Comparison
| Pricing | WhoAPI | WHOISJSON |
|---|---|---|
| Free Tier | 10,000 welcome credits | Free plan available |
| Paid Plans | From $23/month | From $10/month |
| Enterprise | Custom enterprise plans | Higher-volume plans available |
| TLD Coverage | 1,500+ TLDs | 1,500+ TLDs |
Feature Comparison
| Feature | WhoAPI | WHOISJSON |
|---|---|---|
| Free Tier | Limited | Included |
| API Access | Included | Included |
| Bulk Operations | Included | Limited |
| Real-time Data | Included | Included |
| WHOIS Data | Included | Included |
| DNS Lookup | Limited | Included |
| Domain Valuation | Not Included | Not Included |
| Brand Monitoring | Not Included | Not Included |
| MCP/AI Integration | Not Included | Not Included |
Which is Better?
Choose WhoAPI if you need
- Established since 2011
- Comprehensive WHOIS parsing
- Good for bulk availability checks
Choose WHOISJSON if you need
- Covers WHOIS, DNS, SSL, and availability in one API
- Simple entry pricing and low-friction onboarding
- Useful free tier for early testing and prototypes
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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