Best WHOIS JSON API Alternatives ranked by AI · updated Aug 2026

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Whois JSON API is a REST service that returns parsed domain-registration and WHOIS data in JSON format. It is designed for developers building domain lookup, monitoring, availability, and enrichment workflows.

Developer: WhoisJSON Price: N/A 🎯 whoisjsonapi.com

🛠️ Developer Tools 🔌 API Whois domain lookup

Top 6 WHOIS JSON API alternatives

WhoisXML API

💡 Pick it for richer domain intelligence, historical WHOIS, and reverse-WHOIS capabilities.

WhoisXML API supplies WHOIS, DNS, IP, domain reputation, and threat-intelligence data for developers, security teams, and data analysts. Its standout capability is...

Pros

Broader API catalog than WhoisFreaks for enrichment and threat analysis
Supports automated lookups, monitoring, and bulk data workflows
Provides structured outputs that integrate readily with security platforms

Cons

Pricing and product selection can be complex for small projects
Some datasets and request volumes are restricted to higher tiers
Individual API products may require separate evaluation for coverage

Freemium, paid plans available

Alternatives to WhoisXML API → Visit site

Whois API

💡 Choose it for a focused, lower-cost WHOIS lookup API with minimal extra intelligence features.

Whois API provides domain data in real-time with a focus on domain availability, ownership, and contact information.

Pros

Affordable pricing
Real-time domain data

Cons

Limited historical data

Starting from $9.95/month

Alternatives to Whois API →

WhoisFreaks

💡 Pick it when historical WHOIS and DNS data matter alongside ordinary domain lookups.

WhoisFreaks is a domain and IP intelligence platform for developers, security teams, and researchers. It provides WHOIS, historical WHOIS, DNS, reverse WHOIS,...

Pros

Combines current and historical WHOIS data with DNS and IP intelligence
Offers APIs suited to automated domain-monitoring workflows
Generally more accessible for smaller teams than enterprise domain-intelligence platforms

Cons

Smaller ecosystem and brand footprint than DomainTools or SecurityTrails
Coverage and historical depth can vary by TLD and registrar
Enterprise investigation and collaboration features are less extensive than premium competitors

Freemium, paid plans from $10/mo

Alternatives to WhoisFreaks → Visit site

Whois API by APILayer

APILayer

💡 Choose it for marketplace billing and a familiar API platform rather than specialized domain intelligence.

Whois API by APILayer provides domain-registration information through a managed REST API distributed via the APILayer marketplace. It is intended for developers...

Pros

Convenient marketplace-based signup and API-key management
Easy fit for teams already using other APILayer services
Provides structured responses suitable for web and backend applications

Cons

Marketplace abstraction can provide less control than a dedicated WHOIS vendor
Pricing and quotas depend on the selected marketplace plan
Usually offers less domain intelligence depth than specialist providers

Freemium, paid plans vary

Alternatives to Whois API by APILa... → Visit site

SecurityTrails

💡 Pick it when WHOIS lookups must be combined with DNS history and threat-intelligence context.

SecurityTrails offers a platform where you can search and monitor domain registrations, DNS records, IP history, and other cybersecurity-related data.

Pros

Rich DNS and IP data
Historical data tracking

Cons

Focused more on DNS and IP data than domain investigations

Starting from $49/month

Alternatives to SecurityTrails →

DomainTools

💡 Choose it for enterprise-grade domain investigations and extensive historical relationship data.

DomainTools offers a comprehensive suite of domain research and monitoring tools to help companies with domain investigations and domain-related threat intelligence.

Custom pricing based on requirements

Alternatives to DomainTools → Visit site

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