Domainr (Fastly) vs WHOISJSON - Domain API Comparison

Overview

Domainr (Fastly)

Fastly-backed Domain Search API

Domainr is now part of Fastly. The original standalone API is deprecated, while Fastly and RapidAPI packages still cover search, status, and suggestion workflows.

RapidAPI: 10,000 requests/month

WHOISJSON

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 available

Pricing Comparison

Pricing	Domainr (Fastly)	WHOISJSON
Free Tier	RapidAPI: 10,000 requests/month	Free plan available
Paid Plans	High-volume plans via Fastly	From $10/month
Enterprise	Custom via Fastly	Higher-volume plans available
TLD Coverage	ICANN-accredited global coverage	1,500+ TLDs

Feature Comparison

Feature	Domainr (Fastly)	WHOISJSON
Free Tier	Included	Included
API Access	Included	Included
Bulk Operations	Limited	Limited
Real-time Data	Included	Included
WHOIS Data	Limited	Included
DNS Lookup	Not Included	Included
Domain Valuation	Not Included	Not Included
Brand Monitoring	Not Included	Not Included
MCP/AI Integration	Not Included	Not Included

Which is Better?

Choose Domainr (Fastly) if you need

Backed by Fastly infrastructure
Creative domain suggestions
Lower-volume option via RapidAPI

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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