# StableDomains, free: Domain WHOIS API

> GET /api/v1/tools/whois?domain= returns the same data as JSON, free and with no key. It is rate-limited to keep it fair for everyone.

StableDomains's Free plan for the domain WHOIS API costs $0.00 per 1,000 domains. We check each provider's docs for 9 fields. StableDomains's docs list 5: Registrant, Registrar, Name servers, Statuses, DNSSEC.
StableDomains limits how many calls you get but gives no number.
In [our domain WHOIS API benchmark](https://datacircle.dev/best-domain-whois-api.txt), this plan scores 83.3 out of 100. StableDomains ranks 8th of 38 providers.
We rank 589 plans for domain WHOIS APIs by price. Half the plans cost $1.67 or less per 1,000 domains. This plan and 29 others tie for the lowest price per 1,000 domains of the 589 plans. [See the best free domain WHOIS API plan.](https://datacircle.dev/best-domain-whois-api.txt)
[thenetworkery](https://datacircle.dev/domain-whois-apis/thenetworkery/free/llms.txt), [FluentEDI](https://datacircle.dev/domain-whois-apis/fluentedi/free/llms.txt) and [DomainDetails](https://datacircle.dev/domain-whois-apis/domaindetails/9-99-monthly-alerts-get-api-rdap/llms.txt) are the best domain WHOIS API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/domain-whois-apis/stabledomains/free
- [Domain WHOIS API in 2026: the best of 30+ providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://stabledomains.net/tools/whois?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `GET https://stabledomains.net/api/v1/tools/whois`
- API key: not needed
- Its API docs: https://stabledomains.net/tools/whois?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Sold by: StableDomains (https://stabledomains.net?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 56%
- Registrant: ✓
- Registrar: ✓
- Name servers: ✓
- Statuses: ✓
- DNSSEC: ✓

## Score

- Overall score: 83.3
- Price score: 100
- Accuracy score: 87
- Cost to get started score: 100
- Bundle score: 0
- Performance score: 67

## Price

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

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000 calls that find nothing: $0.00

## In their words

- Their pitch: GET /api/v1/tools/whois?domain= returns the same data as JSON, free and with no key. It is rate-limited to keep it fair for everyone.

## Data

- Keep data: no limit
- Use data: Requests are rate-limited per API key or IP address. [...] Do not try to get around limits, overload the Service, scrape it in ways that degrade it, or reach data or accounts that are not yours.

## Plan

- Pay: $0

## Rate limit

- Batch: 1

## Speed

- Answer: in the call
- Median: 0.15 s

## The call

- You send: domain
- Method: GET
- Path: /api/v1/tools/whois

## About the plan

- Plan: Free
- Who can get it: anyone, with no account and no API key

## The 10 fields the plan's answer can hold

registrar, created, updated, expires, age, status, nameservers, DNSSEC, registrant, RDAP source

## StableDomains's plans (1)

- [StableDomains, free](https://datacircle.dev/domain-whois-apis/stabledomains/free/llms.txt): $0.00 per 1,000, 56% complete

## StableDomains's calls (1)

- `GET /api/v1/tools/whois`: [StableDomains, free](https://datacircle.dev/domain-whois-apis/stabledomains/free/llms.txt)

## StableDomains's APIs (1)

- [StableDomains: domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/stabledomains/free/llms.txt)

## StableDomains: domain WHOIS API alternatives

- [thenetworkery, free](https://datacircle.dev/domain-whois-apis/thenetworkery/free/llms.txt): $0.00 per 1,000, 100% complete, live
- [FluentEDI, free](https://datacircle.dev/domain-whois-apis/fluentedi/free/llms.txt): $0.00 per 1,000, 67% complete, live
- [DomainDetails, free, GET /api/rdap](https://datacircle.dev/domain-whois-apis/domaindetails/free-get-api-rdap/llms.txt): $0.00 per 1,000, 67% complete
- [DC5 WHOIS, free, Public instance, GET /api/v1/domain](https://datacircle.dev/domain-whois-apis/dc5-whois/free-public-instance-get-api-v1-domain/llms.txt): $0.00 per 1,000, 78% complete
- [ManyLives, free](https://datacircle.dev/domain-whois-apis/manylives/free/llms.txt): $0.00 per 1,000, 44% complete

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-10.

- https://stabledomains.net?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://stabledomains.net/api/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://stabledomains.net/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://stabledomains.net/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://stabledomains.net/tools/whois?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing