Domain API Reviews

API Provider

WhoAPI →

Established Domain Availability & WHOIS API

Rating: ★★★½ 3.8/5 • From From $23/month

API Provider

Domainr (Fastly) →

Fastly-backed Domain Search API

Rating: ★★★½ 3.7/5 • From High-volume plans via Fastly

API Provider

DNSimple →

Registrar API with DNS Hosting & Automation

Rating: ★★★★ 4.2/5 • From Teams: $29/month + $0.50/zone

API Provider

WhoisXML API →

Enterprise Domain, IP & DNS Intelligence

Rating: ★★★★ 4.3/5 • From Product-specific subscriptions

API Provider

DomainTools →

Enterprise Domain Intelligence & Threat Research

Rating: ★★★★ 4/5 • From Custom enterprise contracts

API Provider

JsonWhois →

Simple WHOIS API

Rating: ★★★½ 3.5/5 • From From $9/month

API Provider

WhoisFreaks →

WHOIS & DNS Intelligence API

Rating: ★★★★ 4.2/5 • From From $19/month

API Provider

IP2WHOIS →

WHOIS API with IP2Location Integration

Rating: ★★★½ 3.8/5 • From Paid plans from $39/month

API Provider

Host.io →

Domain Intelligence and Technology Detection API

Rating: ★★★★ 4/5 • From Plans from $99/month

API Provider

Whoxy →

WHOIS history, reverse WHOIS, and bulk lookup API

• From Pay-as-you-go from $2

API Provider

WHOISJSON →

WHOIS, DNS, SSL, and availability API with a lightweight free plan

• From From $10/month

API Provider

Atom Connect →

Domain valuation, trademark screening, and discovery APIs

• From Partner pricing

API Provider

BuiltWith →

Website technology intelligence and historical stack data API

• From Commercial API plans

API Provider

Wappalyzer →

Technology lookup, company enrichment, and alerts API

• From API plans for enrichment and alerts

API Provider

urlscan.io →

URL scanning, phishing analysis, and brand monitoring API

• From Paid API and search plans

API Provider

FullHunt →

External attack surface, subdomain, and typo-monitoring API

• From Commercial plans

API Provider

Netlas →

Internet-wide scanning, DNS, SSL, and WHOIS datasets

• From Paid API and dataset plans

API Provider

Robtex →

Passive DNS, domain reputation, and infrastructure lookup API

• From Premium API plans

API Provider

RDAP API →

RDAP-first domain, IP, and ASN lookup API

• From Usage-based API plans

API Provider

SecurityTrails →

DNS & Domain Intelligence for Security Research

• From Usage-based plans via sales

API Provider

Censys →

Internet Intelligence and Attack Surface Platform

• From Individual plans from $100/month

API Provider

Shodan →

Internet Exposure Search for Devices and Services

• From Membership $49 one-time, subscriptions from $69/month

API Provider

VirusTotal →

Domain & URL Threat Intelligence

• From Contact sales

API Provider

ViewDNS →

DNS, WHOIS, and Reverse Lookup Toolkit

• From API plans from $25/month

API Provider

MxToolBox →

Email Security & DNS Diagnostic Tools

• From From $99/month

API Provider

HackerTarget →

Security Testing & DNS Reconnaissance

• From From $20/month

API Provider

DNSlytics →

Reverse DNS Analytics and Tracking Code Discovery

• From Premium pay-as-you-go API

Registrar

GoDaddy API →

Domain Registrar API

Rating: ★★★ 3.2/5 • From Included with domain purchases

Registrar

Namecheap API →

Domain Registrar API

Rating: ★★★½ 3.5/5 • From Production: Account qualification

Registrar

Name.com API →

Domain Registrar REST API

Rating: ★★★★ 4/5 • From Pay per registration

Registrar

Dynadot API →

Registrar API for Bulk Investors and Resellers

Rating: ★★★½ 3.8/5 • From Bulk: $500+/year spend

Registrar

Gandi API →

European Registrar API with LiveDNS

Rating: ★★★½ 3.9/5 • From Graduated A-E price rates

Registrar

Cloudflare Registrar →

At-Cost Registrar with Beta API Workflows

Rating: ★★★★ 4.3/5 • From Registrar API beta for supported domains

Registrar

Porkbun API →

Low-cost registrar API with DNS and SSL automation

• From Included with registrar account

Registrar

OpenSRS →

Reseller-focused domain API for large portfolios

• From Reseller pricing