# SiteCheck, pay as you go, x402 pay per call, GET /api/security/whois-rdap: Domain WHOIS API

> Domain registration facts via RDAP (IANA bootstrap, then the registry's own server): registration, last change and expiry dates, days left, registrar name, status flags, nameservers and DNSSEC delegation flag. Registrant contact data is usually redacted by registries and is not returned.

SiteCheck's x402 pay per call plan for the domain WHOIS API costs $2.00 per 1,000 domains. We check each provider's docs for 9 fields. SiteCheck's docs list 7: Registrar, Created on, Updated on, Expires on, Name servers, Statuses, DNSSEC.
We haven't run SiteCheck through [our domain WHOIS API benchmark](https://datacircle.dev/best-domain-whois-api.txt) yet.
We rank 495 plans for domain WHOIS APIs by price. Half the plans cost $1.575 or less per 1,000 domains. This plan costs less per 1,000 domains than 35% of the 495 plans.
[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.
[WhoisJSON](https://datacircle.dev/domain-whois-apis/whoisjson/120-monthly/llms.txt), [Enterno](https://datacircle.dev/domain-whois-apis/enterno/free-open-api/llms.txt) and [IPAddress.to](https://datacircle.dev/domain-whois-apis/ipaddress-to/free/llms.txt) are the best domain WHOIS API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/domain-whois-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-security-whois-rdap
- [Domain WHOIS API in 2026: the best of 20+ providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://api.webintel-api.workers.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `GET https://api.webintel-api.workers.dev/api/security/whois-rdap`
- API key: not needed
- Its API docs: https://api.webintel-api.workers.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing#/paths/~1api~1security~1whois-rdap
- Sold by: SiteCheck (https://api.sitecheck-api.workers.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-09

## In the answer

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

## Price

- $ per 1,000 domains: $2.00
- Per: call
- Billing: pay as you go

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: Domain registration facts via RDAP (IANA bootstrap, then the registry's own server): registration, last change and expiry dates, days left, registrar name, status flags, nameservers and DNSSEC delegation flag. Registrant contact data is usually redacted by registries and is not returned.

## Data

- Freshness: live
- Keep data: no limit
- Use data: Business use only: SiteCheck is offered to businesses, developers and professionals for use in their trade, business or profession. It is not offered to consumers. [...] SiteCheck is not a consumer reporting agency. You must not use results as a factor in decisions about a person's eligibility for credit, insurance, employment, housing or similar purposes under the US Fair Credit Reporting Act or comparable laws. Content in results that belongs to a source remains that source's. You are responsible for making sure that your use, storage and redistribution of results complies with the law (including copyright, database rights and data protection law) and with the terms of the original source. [...] Do not use SiteCheck for anything unlawful, to harass, track, stalk or discriminate against any person, to build profiles of individuals without a lawful basis, or to infringe anyone's rights. Do not attack, overload, scan for weaknesses or try to bypass payment, rate limits or other controls, and do not use the service to attack or overload third-party sources. Do not use SiteCheck if you are, or act for, a person subject to sanctions, or from a country or region where the service or the payment would be prohibited.

## Plan

- Pay: per call

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain
- Method: GET
- Path: /api/security/whois-rdap

## About the plan

- Plan: x402 pay per call
- Who can get it: anyone at least 18 acting for business purposes (not a consumer), not a person subject to sanctions or from a region where the service or the payment would be prohibited, with no account or API key, paying each call in USDC (x402)

## The 12 fields the plan's answer can hold

domain, registration date, updated date, expiry date, days until expiry, registrar name, registrar IANA ID, registry, status, name servers, DNSSEC, checked at

## SiteCheck's plans (1)

- [SiteCheck, pay as you go, x402 pay per call, GET /api/security/whois-rdap](https://datacircle.dev/domain-whois-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-security-whois-rdap/llms.txt): $2.00 per 1,000, 78% complete, live

## SiteCheck's calls for this API (2)

- `GET /api/domain`: [SiteCheck, pay as you go, x402 pay per call, GET /api/domain](https://datacircle.dev/domain-whois-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-domain/llms.txt)
- `GET /api/security/whois-rdap`: [SiteCheck, pay as you go, x402 pay per call, GET /api/security/whois-rdap](https://datacircle.dev/domain-whois-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-security-whois-rdap/llms.txt)

## SiteCheck's APIs (29)

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- [SiteCheck: LinkedIn company data API pricing, 1 plan](https://datacircle.dev/linkedin-company-profile-apis/sitecheck/pay-as-you-go/llms.txt)
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- [SiteCheck: Reddit post API pricing, 1 plan](https://datacircle.dev/reddit-post-apis/sitecheck/pay-as-you-go/llms.txt)
- [SiteCheck: Reddit profile API pricing, 1 plan](https://datacircle.dev/reddit-profile-apis/sitecheck/pay-as-you-go/llms.txt)
- [SiteCheck: email verification API pricing, 1 plan](https://datacircle.dev/validate-email-apis/sitecheck/pay-as-you-go/llms.txt)
- [SiteCheck: Snapchat profile API pricing, 1 plan](https://datacircle.dev/snapchat-profile-apis/sitecheck/pay-as-you-go/llms.txt)
- [SiteCheck: Telegram channel API pricing, 1 plan](https://datacircle.dev/telegram-channel-apis/sitecheck/pay-as-you-go/llms.txt)
- [SiteCheck: Telegram channel post API pricing, 1 plan](https://datacircle.dev/telegram-channel-post-apis/sitecheck/pay-as-you-go/llms.txt)
- [SiteCheck: Threads post API pricing, 1 plan](https://datacircle.dev/threads-post-apis/sitecheck/pay-as-you-go/llms.txt)
- [SiteCheck: Threads profile API pricing, 1 plan](https://datacircle.dev/threads-profile-apis/sitecheck/pay-as-you-go/llms.txt)
- [SiteCheck: TikTok profile API pricing, 1 plan](https://datacircle.dev/tiktok-profile-apis/sitecheck/pay-as-you-go/llms.txt)
- [SiteCheck: Trustpilot review API pricing, 1 plan](https://datacircle.dev/trustpilot-review-apis/sitecheck/pay-as-you-go/llms.txt)
- [SiteCheck: Truth Social post API pricing, 1 plan](https://datacircle.dev/truth-social-post-apis/sitecheck/pay-as-you-go/llms.txt)
- [SiteCheck: Truth Social profile API pricing, 1 plan](https://datacircle.dev/truth-social-profile-apis/sitecheck/pay-as-you-go/llms.txt)
- [SiteCheck: YouTube channel video API pricing, 1 plan](https://datacircle.dev/youtube-channel-video-apis/sitecheck/pay-as-you-go/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/company/registry](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-company-registry/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/b2b/finland-ytj-companies](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-b2b-finland-ytj-companies/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/gov/sunbiz-florida-business](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-gov-sunbiz-florida-business/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/company/fr](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-company-fr/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/b2b/iceland-skatturinn-companies](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-b2b-iceland-skatturinn-companies/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/b2b/ireland-cro-companies](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-b2b-ireland-cro-companies/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/b2b/israel-companies-registrar](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-b2b-israel-companies-registrar/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/lei](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-lei/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/b2b/ny-business-entity](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-b2b-ny-business-entity/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/b2b/nz-companies-register](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-b2b-nz-companies-register/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/b2b/brreg-norway-companies](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-b2b-brreg-norway-companies/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/gov/rfs-russia-business-registry](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-gov-rfs-russia-business-registry/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/b2b/spain-empresia](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-b2b-spain-empresia/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/b2b/texas-sos-business](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-b2b-texas-sos-business/llms.txt)
- [SiteCheck: business verification API pricing, 1 plan, GET /api/uk-company](https://datacircle.dev/business-verification-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-uk-company/llms.txt)
- [SiteCheck: domain WHOIS API pricing, 1 plan, GET /api/security/whois-rdap](https://datacircle.dev/domain-whois-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-security-whois-rdap/llms.txt)
- [SiteCheck: news API pricing, 1 plan, GET /api/search/google-news](https://datacircle.dev/news-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-search-google-news/llms.txt)
- [SiteCheck: news API pricing, 1 plan, GET /api/search/news-across-the-web](https://datacircle.dev/news-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-search-news-across-the-web/llms.txt)
- [SiteCheck: Hacker News search API pricing, 1 plan, GET /api/search/hacker-news](https://datacircle.dev/hacker-news-search-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-search-hacker-news/llms.txt)
- [SiteCheck: Hacker News search API pricing, 1 plan, GET /api/hn/search](https://datacircle.dev/hacker-news-search-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-hn-search/llms.txt)
- [SiteCheck: IP company lookup API pricing, 1 plan, GET /api/security/ip-geolocation-asn](https://datacircle.dev/ip-company-lookup-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-security-ip-geolocation-asn/llms.txt)
- [SiteCheck: IP company lookup API pricing, 1 plan, GET /api/ip](https://datacircle.dev/ip-company-lookup-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-ip/llms.txt)
- [SiteCheck: web scraping API pricing, 1 plan, GET /api/read](https://datacircle.dev/web-scraping-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-read/llms.txt)
- [SiteCheck: web scraping API pricing, 1 plan, GET /api/search/website-content-crawler](https://datacircle.dev/web-scraping-apis/sitecheck/pay-as-you-go-x402-pay-per-call-get-api-search-website-content-crawler/llms.txt)

## SiteCheck: domain WHOIS API alternatives

- [WhoisFreaks, $2,000 pack, 1,000,000 API Credits, POST /v2.0/bulkwhois/live](https://datacircle.dev/domain-whois-apis/whoisfreaks/2000-pack-1000000-api-credits-post-v2-0-bulkwhois-live/llms.txt): $2.00 per 1,000, 100% complete, live
- [Whoxy, $10 pack](https://datacircle.dev/domain-whois-apis/whoxy/10-pack/llms.txt): $2.00 per 1,000, 78% complete, live
- [YourAITools, pay as you go](https://datacircle.dev/domain-whois-apis/youraitools/pay-as-you-go/llms.txt): $2.00 per 1,000, 44% complete, live
- [Eckari, pay as you go, x402, GET /v1/domains/{domain}/expiry](https://datacircle.dev/domain-whois-apis/eckari/pay-as-you-go-x402-get-v1-domains-domain-expiry/llms.txt): $2.00 per 1,000, 22% 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 2026-11-09.

- https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://api.sitecheck-api.workers.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://api.sitecheck-api.workers.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://api.sitecheck-api.workers.dev/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://api.webintel-api.workers.dev/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://api.webintel-api.workers.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://api.webintel-api.workers.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing