# WhoisJSON, free: Domain WHOIS API

> Enterprise-grade WHOIS lookups with sub-200ms response times. Normalized JSON or XML across 1,500+ TLDs, RDAP-ready, with bulk query support. One API key for WHOIS, DNS, SSL, availability, and monitoring.

WhoisJSON's domain WHOIS API on its Basic plan. It costs $0.00 per 1,000 domains. WhoisJSON's docs list 8 of the 9 fields on our checklist: Registrant, Registrar, Created on, Updated on, Expires on, Name servers, Statuses, DNSSEC.
We haven't run WhoisJSON through [our domain WHOIS API benchmark](https://datacircle.dev/best-domain-whois-api.txt) yet.
This plan is free. We rank 316 plans for domain WHOIS APIs by price. Half the plans cost $1.495 per 1,000 domains or less. [See the best free domain WHOIS API plan.](https://datacircle.dev/best-domain-whois-api.txt)
[Searchwire's $10 pack](https://datacircle.dev/domain-whois-apis/searchwire/10-pack/llms.txt) is the cheapest paid plan per 1,000 domains. Searchwire's domain WHOIS API costs nothing beyond the plan price.
[Robtex](https://datacircle.dev/domain-whois-apis/robtex/free/llms.txt), [DomScan](https://datacircle.dev/domain-whois-apis/domscan/6-monthly-starter-post-v1-whois-bulk/llms.txt) and [WhoisFreaks](https://datacircle.dev/domain-whois-apis/whoisfreaks/200-monthly-monthly-subscription-150000-api-credits-post-v2-0-bulkwhois-live/llms.txt) are the best domain WHOIS API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/domain-whois-apis/whoisjson/free
- [Domain WHOIS API: the 13 best providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://whoisjson.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `GET https://whoisjson.com/api/v1/whois`
- API key: with the plan, on https://whoisjson.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Its API docs: https://whoisjson.com/whois-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Sold by: WhoisJSON (https://whoisjson.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 89%
- Registrant: ✓
- Registrar: ✓
- Created on: ✓
- Updated on: ✓
- Expires on: ✓
- Name servers: ✓
- Statuses: ✓
- DNSSEC: ✓

## Price

- $ per 1,000 domains: $0.00
- Per: call
- Billing: free

## Charges

- Repeat free: 3 hours
- Also pays for: from the same budget: Reverse WHOIS · DNS Records · SSL Certificate · Domain Availability · Subdomain Discovery · Email Domain Intelligence

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Enterprise-grade WHOIS lookups with sub-200ms response times. Normalized JSON or XML across 1,500+ TLDs, RDAP-ready, with bulk query support. One API key for WHOIS, DNS, SSL, availability, and monitoring.

## Data

- Freshness: 3 hours
- Keep data: no limit
- Use data: "You agree to use the WhoisJSON API only for lawful purposes and in compliance with these Terms." [...] "Displaying API data within your products, provided you attribute the source to WhoisJSON where feasible." [...] "The following actions are strictly prohibited and will result in the immediate and permanent suspension of all associated accounts, without prior notice, warning, or refund: [...] Reselling, sublicensing, redistributing, or sharing your API key or the data obtained through the API, unless explicitly authorized under a commercial agreement. [...] Using the Service to facilitate spam, phishing, harassment, stalking, or any form of malicious activity. Conducting bulk data harvesting or scraping for the purpose of building a competing service or product."

## Plan

- Pay: $0
- You get: 1,000 requests a month
- Enough for: 1,000 calls a month
- Expires: unused requests do not carry over to the next billing period

## Rate limit

- Per second: 0.33
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain. Optional: format, _forceRefresh
- Method: GET
- Path: /whois

## About the plan

- Plan: Basic
- Who can get it: anyone at least 18 years old (or of legal majority in their jurisdiction), one account per individual or entity

## The 92 fields the plan's answer can hold

server, domain name, IDN name, status, client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited, is active, is on hold, is pending delete, is pending transfer, is in redemption period, nameservers, nameserver count, nameserver list, detected DNS providers, detected DNS provider count, unique nameserver domains, mixed infrastructure, single infrastructure, self-hosted nameservers, IP addresses, creation date, updated date, expiration date, age in days, age in months, age in years, newly registered, young domain, days until expiration, expiring soon, expired, registered, DNSSEC, WHOIS server, registrant handle, registrant type, registrant name, registrant organization, registrant email, registrant street address, registrant ZIP code, registrant city, registrant region, registrant country, registrant phone, registrant fax, registrant creation date, registrant updated date, admin handle, admin type, admin name, admin organization, admin email, admin street address, admin ZIP code, admin city, admin region, admin country, admin phone, admin fax, admin creation date, admin updated date, tech handle, tech type, tech name, tech organization, tech email, tech street address, tech ZIP code, tech city, tech region, tech country, tech phone, tech fax, tech creation date, tech updated date, registrar ID, registrar name, registrar email, registrar URL, registrar phone, raw WHOIS data, network, exception, parsed contacts, ask WHOIS server, lookup protocol

## WhoisJSON's plans (17)

- [WhoisJSON, free](https://datacircle.dev/domain-whois-apis/whoisjson/free/llms.txt): $0.00 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $10 monthly](https://datacircle.dev/domain-whois-apis/whoisjson/10-monthly/llms.txt): $0.333 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $30 monthly](https://datacircle.dev/domain-whois-apis/whoisjson/30-monthly/llms.txt): $0.20 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $50 monthly](https://datacircle.dev/domain-whois-apis/whoisjson/50-monthly/llms.txt): $0.05 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $80 monthly](https://datacircle.dev/domain-whois-apis/whoisjson/80-monthly/llms.txt): $0.018 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $120 monthly](https://datacircle.dev/domain-whois-apis/whoisjson/120-monthly/llms.txt): $0.014 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $200 monthly](https://datacircle.dev/domain-whois-apis/whoisjson/200-monthly/llms.txt): $0.015 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $399 monthly](https://datacircle.dev/domain-whois-apis/whoisjson/399-monthly/llms.txt): $0.015 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $600 monthly](https://datacircle.dev/domain-whois-apis/whoisjson/600-monthly/llms.txt): $0.015 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $100 yearly](https://datacircle.dev/domain-whois-apis/whoisjson/100-yearly/llms.txt): $0.278 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $300 yearly](https://datacircle.dev/domain-whois-apis/whoisjson/300-yearly/llms.txt): $0.167 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $500 yearly](https://datacircle.dev/domain-whois-apis/whoisjson/500-yearly/llms.txt): $0.042 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $800 yearly](https://datacircle.dev/domain-whois-apis/whoisjson/800-yearly/llms.txt): $0.015 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $1,200 yearly](https://datacircle.dev/domain-whois-apis/whoisjson/1200-yearly/llms.txt): $0.012 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $2,000 yearly](https://datacircle.dev/domain-whois-apis/whoisjson/2000-yearly/llms.txt): $0.013 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $3,990 yearly](https://datacircle.dev/domain-whois-apis/whoisjson/3990-yearly/llms.txt): $0.013 per 1,000, 89% complete, 3 hours
- [WhoisJSON, $6,000 yearly](https://datacircle.dev/domain-whois-apis/whoisjson/6000-yearly/llms.txt): $0.013 per 1,000, 89% complete, 3 hours

## WhoisJSON's calls (1)

- `GET /whois`: [WhoisJSON, free](https://datacircle.dev/domain-whois-apis/whoisjson/free/llms.txt)

## WhoisJSON's APIs (1)

- [WhoisJSON: domain WHOIS API pricing, 17 plans](https://datacircle.dev/domain-whois-apis/whoisjson/free/llms.txt)

## WhoisJSON: domain WHOIS API alternatives

- [Enterno, ₽33,516 yearly](https://datacircle.dev/domain-whois-apis/enterno/33516-yearly/llms.txt): $0.011 per 1,000, 89% complete, live
- [WhoisJsonAPI, $2,990 yearly, Enterprise, GET /v1/{domain}](https://datacircle.dev/domain-whois-apis/whoisjsonapi/2990-yearly-enterprise-get-v1-domain/llms.txt): $0.125 per 1,000, 78% complete, 24 hours
- [HackerTarget, $2,400 yearly](https://datacircle.dev/domain-whois-apis/hackertarget/2400-yearly/llms.txt): $0.329 per 1,000, 89% complete, live
- [domainIQ, $149.95 monthly, Expert, GET /api, 15,000 requests a day](https://datacircle.dev/domain-whois-apis/domainiq/149-95-monthly-expert-get-api-15000-requests-a-day/llms.txt): $0.333 per 1,000, 56% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-04.

- https://whoisjson.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://whoisjson.com/bulk-whois-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://whoisjson.com/documentation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://whoisjson.com/faq?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://whoisjson.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://whoisjson.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://whoisjson.com/terms-of-service?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://whoisjson.com/whois-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing