# SupaMarketers, free: Domain WHOIS API

> Inspect domain technologies and registration intelligence.

SupaMarketers's Free sign-up Credits plan for the domain WHOIS API costs $0.00 per 1,000 domains. We check each provider's docs for 9 fields: Registrant, Registrar, Created on, Updated on and 5 more. SupaMarketers's docs list none of the 9.
We haven't run SupaMarketers 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/supamarketers/free
- [Domain WHOIS API: the 19 best of 80+ providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://www.supamarketers.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: Docs behind sign-up
- API key: with the plan, on https://www.supamarketers.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Its API docs: https://www.supamarketers.com/mcp/tools/data/domain-intelligence?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Sold by: SupaMarketers (https://www.supamarketers.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-09

## In the answer

- Completeness: 0%

## Price

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

## Charges

- Also pays for: from the same budget: AI Search Data · App Intelligence call · App Store Data call · Backlink Data · Commerce Data · Competitor Data · Content Analysis · Image Generation · Keyword Data · Local Business Data · Market Data · Media Analysis · Page Extract · Page Extract Batch · Product Intelligence · Search Ads Data · Search Results · Site Audit · Site Map · Social Facebook Search · Social Google Maps Search · Social LinkedIn Search · Social Reddit Community Research · Social Reddit Search · Social Reddit VOC Search · Trend Data · Video Generation · Web Search · YouTube Data

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Inspect domain technologies and registration intelligence.

## Data

- Keep data: no limit
- Use data: You agree not to: Violate applicable laws or regulations. Infringe intellectual property, privacy, publicity, or other rights. Attempt to bypass authentication, authorization, Credits, payment, rate limits, or access controls. Interfere with or disrupt the security, integrity, or performance of the service. Use the service to send spam, malware, deceptive content, or other harmful material. Reverse engineer private APIs, internal prompts, hidden system behavior, or non-public service infrastructure.

## Plan

- Pay: $0
- You get: 1,000 credits
- Enough for: 500 calls

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: Docs behind sign-up

## About the plan

- Plan: Free sign-up Credits
- Who can get it: anyone with a verified email

## The 2 fields the plan's answer can hold

domain, registration details

## SupaMarketers's plans (4)

- [SupaMarketers, free](https://datacircle.dev/domain-whois-apis/supamarketers/free/llms.txt): $0.00 per 1,000, 0% complete
- [SupaMarketers, $19 monthly](https://datacircle.dev/domain-whois-apis/supamarketers/19-monthly/llms.txt): $47.50 per 1,000, 0% complete
- [SupaMarketers, $49 monthly](https://datacircle.dev/domain-whois-apis/supamarketers/49-monthly/llms.txt): $32.667 per 1,000, 0% complete
- [SupaMarketers, $149 monthly](https://datacircle.dev/domain-whois-apis/supamarketers/149-monthly/llms.txt): $29.80 per 1,000, 0% complete

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

- Docs behind sign-up: [SupaMarketers, free](https://datacircle.dev/domain-whois-apis/supamarketers/free/llms.txt)

## SupaMarketers's APIs (17)

- [SupaMarketers: App Store API pricing, 4 plans](https://datacircle.dev/app-store-apis/supamarketers/free/llms.txt)
- [SupaMarketers: App Store review API pricing, 4 plans](https://datacircle.dev/app-store-review-apis/supamarketers/free/llms.txt)
- [SupaMarketers: App Store search API pricing, 4 plans](https://datacircle.dev/app-store-search-apis/supamarketers/free/llms.txt)
- [SupaMarketers: Facebook post API pricing, 4 plans](https://datacircle.dev/facebook-post-apis/supamarketers/free/llms.txt)
- [SupaMarketers: LinkedIn company search API pricing, 4 plans](https://datacircle.dev/linkedin-company-search-apis/supamarketers/free/llms.txt)
- [SupaMarketers: Reddit post API pricing, 4 plans](https://datacircle.dev/reddit-post-apis/supamarketers/free/llms.txt)
- [SupaMarketers: backlink API pricing, 4 plans](https://datacircle.dev/backlink-apis/supamarketers/free/llms.txt)
- [SupaMarketers: tech stack API pricing, 4 plans](https://datacircle.dev/company-technology-apis/supamarketers/free/llms.txt)
- [SupaMarketers: domain WHOIS API pricing, 4 plans](https://datacircle.dev/domain-whois-apis/supamarketers/free/llms.txt)
- [SupaMarketers: keyword research API pricing, 4 plans](https://datacircle.dev/keyword-research-apis/supamarketers/free/llms.txt)
- [SupaMarketers: local business reviews API pricing, 4 plans](https://datacircle.dev/local-business-reviews-apis/supamarketers/free/llms.txt)
- [SupaMarketers: local business search API pricing, 4 plans](https://datacircle.dev/local-business-search-apis/supamarketers/free/llms.txt)
- [SupaMarketers: ranked keywords API pricing, 4 plans](https://datacircle.dev/ranked-keywords-apis/supamarketers/free/llms.txt)
- [SupaMarketers: SERP API pricing, 4 plans](https://datacircle.dev/serp-apis/supamarketers/free/llms.txt)
- [SupaMarketers: web scraping API pricing, 4 plans](https://datacircle.dev/web-scraping-apis/supamarketers/free/llms.txt)
- [SupaMarketers: web search API pricing, 4 plans](https://datacircle.dev/web-search-apis/supamarketers/free/llms.txt)
- [SupaMarketers: video search API pricing, 4 plans](https://datacircle.dev/video-search-apis/supamarketers/free/llms.txt)

## SupaMarketers: domain WHOIS API alternatives

- [SecurityTrails, $500 monthly](https://datacircle.dev/domain-whois-apis/securitytrails/500-monthly/llms.txt): $25.00 per 1,000, 67% complete
- [ViewDNS.info, $149 pack](https://datacircle.dev/domain-whois-apis/viewdns-info/149-pack/llms.txt): $29.80 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
- [Qonoro, pay as you go](https://datacircle.dev/domain-whois-apis/qonoro/pay-as-you-go/llms.txt): $30.00 per 1,000, 44% complete
- [Cedula 360, contact us](https://datacircle.dev/domain-whois-apis/cedula-360/contact-us/llms.txt): $31.478 per 1,000, 33% 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 2026-11-09.

- https://www.supamarketers.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://www.supamarketers.com/help?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://www.supamarketers.com/mcp?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://www.supamarketers.com/mcp/servers/data?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://www.supamarketers.com/mcp/tools/data/domain-intelligence?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://www.supamarketers.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://www.supamarketers.com/refund-policy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://www.supamarketers.com/terms-of-service?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing