# Osint, free: Domain WHOIS API

> To find out who owns a domain, enter the domain, a URL or an email address: you get the owner where the record shows it, the registrar, when it was registered and expires, and where it points - with redacted placeholders left out.

Osint's Free account plan for the domain WHOIS API costs $0.00 per 1,000 domains. We check each provider's docs for 9 fields. Osint's docs list 8: Registrant, Registrar, Created on, Updated on, Expires on, Name servers, Statuses, Abuse contact.
We haven't run Osint through [our domain WHOIS API benchmark](https://datacircle.dev/best-domain-whois-api.txt) yet.
This plan is free. We rank 400 plans for domain WHOIS APIs by price. Half the plans cost $1.50 or less per 1,000 domains. [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. [C99.nl's $25 yearly plan](https://datacircle.dev/domain-whois-apis/c99-nl/25-yearly/llms.txt) costs the least for 10,000 domains a month: $2.08.
[Enterno](https://datacircle.dev/domain-whois-apis/enterno/free-open-api/llms.txt), [IPAddress.to](https://datacircle.dev/domain-whois-apis/ipaddress-to/free/llms.txt) and [Robtex](https://datacircle.dev/domain-whois-apis/robtex/free/llms.txt) are the best domain WHOIS API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/domain-whois-apis/osint/free
- [Domain WHOIS API: the 19 best of 80+ providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://osint.foundation/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `GET https://osint.foundation/api/v1/whois/{domain}`
- API key: with the plan, on https://osint.foundation/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Its API docs: https://osint.foundation/whois-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Sold by: Osint (https://osint.foundation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-08

## In the answer

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

## Price

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

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: To find out who owns a domain, enter the domain, a URL or an email address: you get the owner where the record shows it, the registrar, when it was registered and expires, and where it points - with redacted placeholders left out.

## Data

- Freshness: live
- Keep data: no limit
- Use data: Use the service only for lawful purposes, such as security research, fraud prevention, due diligence, journalism, investigations and checking your own exposure [...] You must not use the service, or anything it returns, to: stalk, harass, threaten, dox or intimidate anyone, [...] make decisions about a person’s employment, housing, credit or insurance, or discriminate against anyone, commit or facilitate fraud, identity theft or any other crime, resell or republish raw results as a competing dataset or service without our written permission, get around rate limits, credit metering or account restrictions, scrape the website instead of using the API, or repeatedly send input the service cannot process, attack, probe or overload the service or its infrastructure.

## Plan

- Pay: $0
- You get: 3 credits a day
- Enough for: 3 calls a day

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain
- Method: GET
- Path: /v1/whois/{domain}

## About the plan

- Plan: Free account
- Who can get it: anyone aged 18 or over who can enter a binding contract, with an email-verified account

## The 14 fields the plan's answer can hold

domain, registrant name, registrant organization, registrant email, registrant country, privacy, privacy service, registrar, registrar abuse contact, creation date, expiration date, updated date, status, name servers

## Osint's plans (7)

- [Osint, free](https://datacircle.dev/domain-whois-apis/osint/free/llms.txt): $0.00 per 1,000, 89% complete, live
- [Osint, $4.20 pack](https://datacircle.dev/domain-whois-apis/osint/4-20-pack/llms.txt): $84.00 per 1,000, 89% complete, live
- [Osint, $29.99 pack](https://datacircle.dev/domain-whois-apis/osint/29-99-pack/llms.txt): $29.99 per 1,000, 89% complete, live
- [Osint, $99.99 pack](https://datacircle.dev/domain-whois-apis/osint/99-99-pack/llms.txt): $9.999 per 1,000, 89% complete, live
- [Osint, $699 pack](https://datacircle.dev/domain-whois-apis/osint/699-pack/llms.txt): $1.398 per 1,000, 89% complete, live
- [Osint, $1,999 pack](https://datacircle.dev/domain-whois-apis/osint/1999-pack/llms.txt): $0.20 per 1,000, 89% complete, live
- [Osint, contact us](https://datacircle.dev/domain-whois-apis/osint/contact-us/llms.txt): 89% complete, live

## Osint's calls for this API (1)

- `GET /v1/whois/{domain}`: [Osint, free](https://datacircle.dev/domain-whois-apis/osint/free/llms.txt)

## Osint's APIs (13)

- [Osint: Facebook page API pricing, 7 plans](https://datacircle.dev/facebook-page-apis/osint/free/llms.txt)
- [Osint: GitHub profile API pricing, 7 plans](https://datacircle.dev/github-profile-apis/osint/free/llms.txt)
- [Osint: Instagram profile API pricing, 7 plans](https://datacircle.dev/instagram-profile-apis/osint/free/llms.txt)
- [Osint: business verification API pricing, 7 plans](https://datacircle.dev/business-verification-apis/osint/free/llms.txt)
- [Osint: domain WHOIS API pricing, 7 plans](https://datacircle.dev/domain-whois-apis/osint/free/llms.txt)
- [Osint: IP company lookup API pricing, 7 plans](https://datacircle.dev/ip-company-lookup-apis/osint/free/llms.txt)
- [Osint: local business search API pricing, 7 plans](https://datacircle.dev/local-business-search-apis/osint/free/llms.txt)
- [Osint: phone validation API pricing, 7 plans](https://datacircle.dev/validate-phone-apis/osint/free/llms.txt)
- [Osint: reverse email lookup API pricing, 7 plans](https://datacircle.dev/reverse-email-lookup-apis/osint/free/llms.txt)
- [Osint: web scraping API pricing, 7 plans](https://datacircle.dev/web-scraping-apis/osint/free/llms.txt)
- [Osint: Snapchat profile API pricing, 7 plans](https://datacircle.dev/snapchat-profile-apis/osint/free/llms.txt)
- [Osint: Telegram channel API pricing, 7 plans](https://datacircle.dev/telegram-channel-apis/osint/free/llms.txt)
- [Osint: TikTok profile API pricing, 7 plans](https://datacircle.dev/tiktok-profile-apis/osint/free/llms.txt)

## Osint: domain WHOIS API alternatives

- [Enterno, ₽2,511 yearly](https://datacircle.dev/domain-whois-apis/enterno/2511-yearly/llms.txt): $0.164 per 1,000, 89% complete, live
- [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
- [Whoxy, $10,000 pack](https://datacircle.dev/domain-whois-apis/whoxy/10000-pack/llms.txt): $0.40 per 1,000, 78% 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 2026-11-08.

- https://osint.foundation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://osint.foundation/openapi.yaml?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://osint.foundation/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://osint.foundation/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://osint.foundation/whois-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing