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Domain WHOIS API

This API allows users to look up detailed information about domains, including age, registrar, creation and expiry dates, and nameservers. It returns clean JSON data suitable for various applications such as threat intelligence and due diligence, with no authentication required for the free tier.

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AuthHTTPSNo CORSSecurity

Verified 4 days ago: 100% uptime

API key

Unconfirmed

HTTPS

Supported

Browser calls

No, needs a proxy

Status

Live · 95/100

What our checks found

Health score
95/100
Reliability
100%
Average latency
258ms

Last checked 2026-09-18. Measured independently, not self-reported by the provider.

How to call it

A starting template for Domain WHOIS API. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.

# Authentication requirement is unconfirmed. Check the documentation before relying on this.
curl -s "https://kiprio.com/ENDPOINT" \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Accept: application/json"

This API does not send CORS headers, so a browser will block a direct call from your front end. Call it from your server, or put a small proxy in front of it.

Where this listing comes from

Aggregated from one public source (freepublicapis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.

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Domain WHOIS API — common questions

Answered from what our own scheduled checks found, not from the provider's marketing.

Is Domain WHOIS API free to use?

Domain WHOIS API is listed in our free catalogue, but it requires some form of authentication, so you will need to register before your first call. Providers frequently reserve higher limits and commercial use for paid plans.

Does Domain WHOIS API need an API key?

Domain WHOIS API requires some form of authentication. Check the provider's documentation for which scheme it expects.

Can I call Domain WHOIS API from browser JavaScript?

Not directly. Domain WHOIS API did not return CORS headers when we checked, so the browser will block your page from reading the response even though the request itself succeeds. Call it from a server, or put a small proxy in front of it.

Is Domain WHOIS API still working?

Yes, as of 2026-09-18. Our automated check reached Domain WHOIS API and recorded a 100% reliability score with a median response time of 258 ms. We re-check on a schedule, and this page updates with the result.

Is Domain WHOIS API available over HTTPS?

Yes. Domain WHOIS API serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.