# Pushbuild, free: Domain WHOIS API

> For any list of domains: registrar, creation and expiry dates, nameservers (RDAP/WHOIS), A/MX/SPF/DMARC records, email provider, SSL certificate issuer and expiry, HTTP status and detected technologies (Shopify, WordPress, HubSpot, Stripe…).

Pushbuild's domain WHOIS API on its Free plan. It costs $0.00 per 1,000 domains. Pushbuild's docs list 4 of the 9 fields on our checklist: Registrar, Created on, Expires on, Name servers.
In [our domain WHOIS API benchmark](https://datacircle.dev/best-domain-whois-api.txt), the best plan from Pushbuild scores 53.5 out of 100. Pushbuild ranks 6th 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/pushbuild/free
- [Domain WHOIS API: the 13 best providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://pushbuild.com/apis?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `POST https://api.pushbuild.com/domain-intelligence/run`
- API key: with the plan, on https://pushbuild.com/apis?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Its API docs: https://pushbuild.com/apis/domain-intelligence.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Sold by: Pushbuild (https://pushbuild.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 44%
- Registrar: ✓
- Created on: ✓
- Expires on: ✓
- Name servers: ✓

## Price

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

## Charges

- Also pays for: from the same budget: 423 other calls

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: For any list of domains: registrar, creation and expiry dates, nameservers (RDAP/WHOIS), A/MX/SPF/DMARC records, email provider, SSL certificate issuer and expiry, HTTP status and detected technologies (Shopify, WordPress, HubSpot, Stripe…).

## Data

- Keep data: no limit
- Use data: [...] we grant you a limited, revocable, non-exclusive, non-transferable, non-sublicensable license to call our APIs with the key we issue to you, for your internal business purposes. [...] You alone are responsible for ensuring that your use of any output complies with all applicable laws, regulations, third-party terms of service, robots directives, intellectual property rights, privacy and data protection laws, and contractual obligations [...] You will not use any output, including any owner, property, name or address data, as a consumer report or as a factor in determining eligibility for credit, insurance, employment, housing or tenancy [...] You will not, and will not let anyone else: (a) violate any law or third-party right, (b) reverse engineer or decompile the Site, or scrape or bulk-copy it, except through the APIs as licensed or as our robots.txt permits [...], (c) resell, sublicense, white-label or provide the APIs to third parties as a standalone service, unless we agree in writing, (d) circumvent any rate limit, key, access control or security measure, (e) interfere with or overload the Site, or introduce malware, (f) use the Site to build a competing product or service, (g) submit content that is unlawful, infringing, defamatory, or that you have no right to share, (h) misrepresent your identity or affiliation, or (i) submit protected health information, payment card data, government ID numbers, or other sensitive data [...]

## Plan

- Pay: $0
- You get: $1 a month
- Enough for: about 416 results a month

## Rate limit

- Batch: 500

## Speed

- Answer: in the call
- Median: 1.24 s

## The call

- You send: domains. Optional: maxItems
- Method: POST
- Path: /domain-intelligence/run

## About the plan

- Plan: Free
- Who can get it: anyone with an email address

## The 4 fields the plan's answer can hold

registrar, creation date, expiry date, nameservers

## Pushbuild's plans (2)

- [Pushbuild, free](https://datacircle.dev/domain-whois-apis/pushbuild/free/llms.txt): $0.00 per 1,000, 44% complete
- [Pushbuild, top-up](https://datacircle.dev/domain-whois-apis/pushbuild/top-up/llms.txt): $2.40 per 1,000, 44% complete

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

- `POST /domain-intelligence/run`: [Pushbuild, free](https://datacircle.dev/domain-whois-apis/pushbuild/free/llms.txt)

## Pushbuild's APIs (18)

- [Pushbuild: App Store API pricing, 2 plans](https://datacircle.dev/app-store-apis/pushbuild/free/llms.txt)
- [Pushbuild: App Store review API pricing, 2 plans](https://datacircle.dev/app-store-review-apis/pushbuild/free/llms.txt)
- [Pushbuild: Bluesky post API pricing, 2 plans](https://datacircle.dev/bluesky-post-apis/pushbuild/free/llms.txt)
- [Pushbuild: Bluesky profile API pricing, 2 plans](https://datacircle.dev/bluesky-profile-apis/pushbuild/free/llms.txt)
- [Pushbuild: GitHub repository API pricing, 2 plans](https://datacircle.dev/github-repository-apis/pushbuild/free/llms.txt)
- [Pushbuild: GitHub user repository API pricing, 2 plans](https://datacircle.dev/github-user-repository-apis/pushbuild/free/llms.txt)
- [Pushbuild: Google Ads Transparency API pricing, 2 plans](https://datacircle.dev/google-ad-apis/pushbuild/free/llms.txt)
- [Pushbuild: news API pricing, 2 plans](https://datacircle.dev/news-apis/pushbuild/free/llms.txt)
- [Pushbuild: Google Play API pricing, 2 plans](https://datacircle.dev/google-play-apis/pushbuild/free/llms.txt)
- [Pushbuild: Google Play review API pricing, 2 plans](https://datacircle.dev/google-play-review-apis/pushbuild/free/llms.txt)
- [Pushbuild: Hacker News search API pricing, 2 plans](https://datacircle.dev/hacker-news-search-apis/pushbuild/free/llms.txt)
- [Pushbuild: company open jobs API pricing, 2 plans](https://datacircle.dev/company-open-job-apis/pushbuild/free/llms.txt)
- [Pushbuild: tech stack API pricing, 2 plans](https://datacircle.dev/company-technology-apis/pushbuild/free/llms.txt)
- [Pushbuild: domain WHOIS API pricing, 2 plans](https://datacircle.dev/domain-whois-apis/pushbuild/free/llms.txt)
- [Pushbuild: email verification API pricing, 2 plans](https://datacircle.dev/validate-email-apis/pushbuild/free/llms.txt)
- [Pushbuild: phone validation API pricing, 2 plans](https://datacircle.dev/validate-phone-apis/pushbuild/free/llms.txt)
- [Pushbuild: Telegram channel post API pricing, 2 plans](https://datacircle.dev/telegram-channel-post-apis/pushbuild/free/llms.txt)
- [Pushbuild: business verification API pricing, 2 plans, POST /czech-company-registry/run](https://datacircle.dev/business-verification-apis/pushbuild/free-post-czech-company-registry-run/llms.txt)
- [Pushbuild: business verification API pricing, 2 plans, POST /finland-company-registry/run](https://datacircle.dev/business-verification-apis/pushbuild/free-post-finland-company-registry-run/llms.txt)
- [Pushbuild: business verification API pricing, 2 plans, POST /france-company-registry/run](https://datacircle.dev/business-verification-apis/pushbuild/free-post-france-company-registry-run/llms.txt)
- [Pushbuild: business verification API pricing, 2 plans, POST /norway-company-registry/run](https://datacircle.dev/business-verification-apis/pushbuild/free-post-norway-company-registry-run/llms.txt)
- [Pushbuild: business verification API pricing, 2 plans, POST /uk-companies-house/run](https://datacircle.dev/business-verification-apis/pushbuild/free-post-uk-companies-house-run/llms.txt)
- [Pushbuild: business verification API pricing, 2 plans, POST /us-small-business-lookup/run](https://datacircle.dev/business-verification-apis/pushbuild/free-post-us-small-business-lookup-run/llms.txt)
- [Pushbuild: business verification API pricing, 2 plans, POST /us-state-business-registry/run](https://datacircle.dev/business-verification-apis/pushbuild/free-post-us-state-business-registry-run/llms.txt)

## Pushbuild: domain WHOIS API alternatives

- [Be1, top-up](https://datacircle.dev/domain-whois-apis/be1/top-up/llms.txt): $2.388 per 1,000, 67% complete
- [JsonWhois, $19.36 monthly](https://datacircle.dev/domain-whois-apis/jsonwhois/19-36-monthly/llms.txt): $2.42 per 1,000, 78% complete, 1 week
- [WhoisFreaks, $1,100 pack, 450,000 API Credits, POST /v2.0/bulkwhois/live](https://datacircle.dev/domain-whois-apis/whoisfreaks/1100-pack-450000-api-credits-post-v2-0-bulkwhois-live/llms.txt): $2.444 per 1,000, 100% complete, live
- [Companyfacts, $49 monthly](https://datacircle.dev/domain-whois-apis/companyfacts/49-monthly/llms.txt): $2.45 per 1,000, 67% 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 2026-11-04.

- https://pushbuild.com/apis?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://pushbuild.com/apis/app/signup?api=google-ads-transparency&utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://pushbuild.com/apis/domain-intelligence.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://pushbuild.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing