# Unstuckapi, free: Domain WHOIS API

> Look up everything about a domain: WHOIS-style registration data (registrar, creation and expiry dates via RDAP), DNS records (A, AAAA, MX, NS, TXT), email security (parsed SPF and DMARC), and the website's SSL/TLS certificate issuer and expiry date.

Unstuckapi's domain WHOIS API on its Free tries plan. It costs $0.00 per 1,000 domains. Unstuckapi's docs list 7 of the 9 fields on our checklist: Registrar, Created on, Updated on, Expires on, Name servers, Statuses, DNSSEC.
You get up to 300 calls a month.
In [our domain WHOIS API benchmark](https://datacircle.dev/best-domain-whois-api.txt), the best plan from Unstuckapi scores 49.8 out of 100. Unstuckapi ranks 9th of 13 providers.
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/unstuckapi/free
- [Domain WHOIS API: the 13 best providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://unstuckapi.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `POST https://unstuckapi.com/v1/tools/domain_info`
- API key: not needed
- Its API docs: https://unstuckapi.com/tools/domain_info?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Sold by: Unstuckapi (https://unstuckapi.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-05

## In the answer

- Completeness: 78%
- Registrar: ✓
- Created on: ✓
- Updated on: ✓
- Expires on: ✓
- Name servers: ✓
- Statuses: ✓
- DNSSEC: ✓

## Price

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

## Charges

- Also pays for: from the same budget: Read web page · Check Domain Availability · Extract Text from a PDF · CVE Vulnerability Lookup · Academic Paper Search

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Look up everything about a domain: WHOIS-style registration data (registrar, creation and expiry dates via RDAP), DNS records (A, AAAA, MX, NS, TXT), email security (parsed SPF and DMARC), and the website's SSL/TLS certificate issuer and expiry date.

## Data

- Keep data: no limit
- Use data: Do not use Unstuck for: Spam or unlawful activity. Harvesting personal data for unsolicited messages. Attacking, disrupting, or overloading websites or services. Bypassing access controls or using data without the rights or permissions you need. When using email tools, comply with applicable laws, including CAN-SPAM and GDPR where they apply. A found or verified email address is not permission to contact someone.

## Plan

- Pay: $0
- Enough for: 300 calls a month

## Rate limit

- Per day: 10
- Batch: 1

## Speed

- Answer: in the call
- Median: 0.18 s

## The call

- You send: domain
- Method: POST
- Path: /v1/tools/domain_info

## About the plan

- Plan: Free tries
- Who can get it: anyone

## The 13 fields the plan's answer can hold

domain, registrable domain, registered, created date, expiry date, updated date, registrar, registrar IANA ID, status, nameservers, DNSSEC, amount charged, remaining balance

## Unstuckapi's plans (4)

- [Unstuckapi, free](https://datacircle.dev/domain-whois-apis/unstuckapi/free/llms.txt): $0.00 per 1,000, 78% complete
- [Unstuckapi, $10 pack](https://datacircle.dev/domain-whois-apis/unstuckapi/10-pack/llms.txt): $10.00 per 1,000, 78% complete
- [Unstuckapi, $20 pack](https://datacircle.dev/domain-whois-apis/unstuckapi/20-pack/llms.txt): $10.00 per 1,000, 78% complete
- [Unstuckapi, $50 pack](https://datacircle.dev/domain-whois-apis/unstuckapi/50-pack/llms.txt): $10.00 per 1,000, 78% complete

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

- `POST /v1/tools/domain_info`: [Unstuckapi, free](https://datacircle.dev/domain-whois-apis/unstuckapi/free/llms.txt)

## Unstuckapi's APIs (12)

- [Unstuckapi: domain WHOIS API pricing, 4 plans](https://datacircle.dev/domain-whois-apis/unstuckapi/free/llms.txt)
- [Unstuckapi: web scraping API pricing, 4 plans](https://datacircle.dev/web-scraping-apis/unstuckapi/free/llms.txt)
- [Unstuckapi: keyword research API pricing, 3 plans](https://datacircle.dev/keyword-research-apis/unstuckapi/10-pack/llms.txt)
- [Unstuckapi: SERP API pricing, 3 plans](https://datacircle.dev/serp-apis/unstuckapi/10-pack/llms.txt)
- [Unstuckapi: Local business reviews API pricing, 3 plans](https://datacircle.dev/local-business-reviews-apis/unstuckapi/10-pack/llms.txt)
- [Unstuckapi: Local business search API pricing, 3 plans](https://datacircle.dev/local-business-search-apis/unstuckapi/10-pack/llms.txt)
- [Unstuckapi: Google Shopping search API pricing, 3 plans](https://datacircle.dev/google-shopping-search-apis/unstuckapi/10-pack/llms.txt)
- [Unstuckapi: Trustpilot review API pricing, 3 plans](https://datacircle.dev/trustpilot-review-apis/unstuckapi/10-pack/llms.txt)
- [Unstuckapi: company discovery API pricing, 3 plans](https://datacircle.dev/company-discovery-apis/unstuckapi/10-pack/llms.txt)
- [Unstuckapi: tech stack API pricing, 3 plans](https://datacircle.dev/company-technology-apis/unstuckapi/10-pack/llms.txt)
- [Unstuckapi: email verification API pricing, 3 plans](https://datacircle.dev/validate-email-apis/unstuckapi/10-pack/llms.txt)
- [Unstuckapi: email finder API pricing, 3 plans](https://datacircle.dev/find-email-apis/unstuckapi/10-pack/llms.txt)

## Unstuckapi: domain WHOIS API alternatives

- [IP2Location.io, $49 monthly](https://datacircle.dev/domain-whois-apis/ip2location-io/49-monthly/llms.txt): $9.80 per 1,000, 78% complete
- [ScrapeWhale, $9.90 pack](https://datacircle.dev/domain-whois-apis/scrapewhale/9-90-pack/llms.txt): $9.90 per 1,000, 78% complete, 7 days
- [ViewDNS.info, $149 monthly](https://datacircle.dev/domain-whois-apis/viewdns-info/149-monthly/llms.txt): $9.933 per 1,000, 89% complete, live
- [DomainRef, pay as you go, Pay per call, GET /v1/domain/check](https://datacircle.dev/domain-whois-apis/domainref/pay-as-you-go-pay-per-call-get-v1-domain-check/llms.txt): $10.00 per 1,000, 44% 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 2026-11-05.

- https://unstuckapi.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://unstuckapi.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://unstuckapi.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://unstuckapi.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://unstuckapi.com/refunds?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://unstuckapi.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://unstuckapi.com/tools/domain_info?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing