Whois API for Looking up Accurate Domain Data.
Effortlessly retrieve accurate WHOIS details for any domain with our REST API. Perform bulk WHOIS queries and check URL availability in real time, all in a structured JSON format for seamless integration into your applications.
Engineered for High-Performance Teams
Our infrastructure handles millions of queries so you can focus on building your product without worrying about rate limits or parsing logic.
High Availability
Redundant server clusters across 4 global regions ensure your services never experience downtime.
Global Coverage
Support for legacy TLDs, gTLDs, and ccTLDs with normalized data fields across all extensions.
JSON-First Output
Stop parsing messy text records. Get clean, structured JSON every single time for easy integration.
Powering the next generation of domain tools
security Cybersecurity
Detect malicious domains and track cybercriminal infrastructure in real-time.
verified Brand Protection
Monitor trademark infringements and unauthorized usage of your brand assets.
insights Market Intelligence
Analyze domain ownership trends and industry shifts for competitive advantage.
payments Domain Investing
Track expiration dates and availability for high-value domain names.
Global Reliability & Speed
Low latency access from anywhere in the world with our globally distributed edge nodes.
Integrate in Minutes
Our API is designed to be as simple as possible. Get started with just a few lines of code.
curl -X GET "https://whoisjsonapi.com/v1/example.com" \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Accept: application/json"
import requests
response = requests.get(
"https://whoisjsonapi.com/v1/example.com",
headers={
"Authorization": "Bearer YOUR_API_KEY",
"Accept": "application/json",
},
)
print(response.json())
const response = await fetch("https://whoisjsonapi.com/v1/example.com", {
headers: {
Authorization: "Bearer YOUR_API_KEY",
Accept: "application/json",
},
});
const data = await response.json();
console.log(data);
package main
import (
"fmt"
"io"
"net/http"
)
func main() {
req, err := http.NewRequest("GET", "https://whoisjsonapi.com/v1/example.com", nil)
if err != nil {
panic(err)
}
req.Header.Set("Authorization", "Bearer YOUR_API_KEY")
req.Header.Set("Accept", "application/json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
panic(err)
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
panic(err)
}
fmt.Println(string(body))
}
Simple, Transparent Pricing
Choose the plan that's right for your scale. No hidden fees.
Basic
Best for solo entrepreneurs and small startups
- check_circle 2,000,000 requests / mo
- check_circle 7 days trial period
- check_circle Cancel anytime
- check_circle Check over 500 million domain names
- check_circle Domain availability API
- check_circle Regular support
- cancel Bulk WHOIS API
Premium
Good for small companies who works with a large number of domains
- check_circle 5,000,000 requests / mo
- check_circle 7 days trial period
- check_circle Cancel anytime
- check_circle Check over 500 million domain names
- check_circle Bulk WHOIS API
- check_circle Domain availability API
- check_circle Priority support
Enterprise
Best for enterprise level companies and projects
- check_circle 15,000,000 requests / mo
- check_circle 7 days trial period
- check_circle Cancel anytime
- check_circle Check over 500 million domain names
- check_circle Bulk WHOIS API
- check_circle Domain availability API
- check_circle Priority support
Frequently Asked Questions
Everything you need to know about our domain data services.
How accurate is your WHOIS data?
We query the source registries in real-time. Our advanced parsing engine normalizes disparate data formats from over 2,000 TLDs into a single, reliable JSON structure with 99.9% accuracy.
Do you support private WHOIS records?
Yes, we return exactly what is available in the public record. If a domain has privacy protection, the API will reflect the proxy details provided by the registrar.
What is the rate limit for free accounts?
Free accounts get 500 requests per month. If you need more, you can upgrade to our Pro or Enterprise plans which offer higher limits and priority infrastructure.
Can I monitor domains for changes?
Absolutely. Our monitoring service can alert you via webhooks whenever a domain's status, expiration date, or ownership details change (coming soon).
Still have questions?
Contact Support TeamReady to scale your domain tools?
Join 10,000+ developers building with WhoisJsonAPI today. Start for free, no credit card required.