# FiatDock, pay as you go: Domain WHOIS API

> Everything about a domain in one call: registrar, creation and expiry dates and age from the registry's own RDAP, live DNS (A/AAAA/MX/NS), email authentication (SPF, DMARC policy) and the TLS certificate it serves (issuer, validity, days left, whether it covers the name).

FiatDock's x402 pay per call plan for the domain WHOIS API costs $4.50 per 1,000 domains. We check each provider's docs for 9 fields. FiatDock's docs list 4: Registrar, Name servers, Statuses, DNSSEC.
We haven't run FiatDock 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 24% 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/fiatdock/pay-as-you-go
- [Domain WHOIS API in 2026: the best of 20+ providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://fiatdock.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `POST https://fiatdock.com/v1/domain/intel`
- API key: not needed
- Its API docs: https://fiatdock.com/tools/domain_intel?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Sold by: FiatDock (https://fiatdock.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-09

## In the answer

- Completeness: 44%
- Registrar: ✓
- Name servers: ✓
- Statuses: ✓
- DNSSEC: ✓

## Price

- $ per 1,000 domains: $4.50
- Per: call
- Billing: pay as you go

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $4.50

## In their words

- Their pitch: Everything about a domain in one call: registrar, creation and expiry dates and age from the registry's own RDAP, live DNS (A/AAAA/MX/NS), email authentication (SPF, DMARC policy) and the TLS certificate it serves (issuer, validity, days left, whether it covers the name).

## Data

- Freshness: live
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: per call

## Rate limit

- Per second: 2
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: nothing required. Optional: domain
- Method: POST
- Path: /v1/domain/intel

## About the plan

- Plan: x402 pay per call
- Who can get it: anyone aged 18 or over (or an entity they lawfully represent), with no account or API key, paying each call in USDC on Base or Solana (x402), its terms and footer say it is not available in the restricted jurisdictions they list

## The 35 fields the plan's answer can hold

domain, registered domain, exists, registrar, created at, expires at, updated at, domain age, days to expiry, status, name servers, DNSSEC, registration note, A records, AAAA records, MX records, NS records, TXT record count, DNS resolved, SPF record, DMARC record, DMARC policy, TLS valid, TLS error, TLS issuer, TLS subject, TLS valid from, TLS valid to, TLS days remaining, TLS SAN count, TLS covers domain, TLS protocol, checked at, sources, note

## FiatDock's plans (1)

- [FiatDock, pay as you go](https://datacircle.dev/domain-whois-apis/fiatdock/pay-as-you-go/llms.txt): $4.50 per 1,000, 44% complete, live

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

- `POST /v1/domain/intel`: [FiatDock, pay as you go](https://datacircle.dev/domain-whois-apis/fiatdock/pay-as-you-go/llms.txt)

## FiatDock's APIs (4)

- [FiatDock: domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/fiatdock/pay-as-you-go/llms.txt)
- [FiatDock: email verification API pricing, 1 plan](https://datacircle.dev/validate-email-apis/fiatdock/pay-as-you-go/llms.txt)
- [FiatDock: web scraping API pricing, 1 plan](https://datacircle.dev/web-scraping-apis/fiatdock/pay-as-you-go/llms.txt)
- [FiatDock: Hacker News search API pricing, 1 plan](https://datacircle.dev/hacker-news-search-apis/fiatdock/pay-as-you-go/llms.txt)

## FiatDock: domain WHOIS API alternatives

- [WhoisFreaks, $60 pack, 15,000 API Credits, GET /v2.0/whois/live](https://datacircle.dev/domain-whois-apis/whoisfreaks/60-pack-15000-api-credits-get-v2-0-whois-live/llms.txt): $4.00 per 1,000, 100% complete, live
- [WhoAPI, $4,990 yearly, Business yearly, GET /, Live Whois API](https://datacircle.dev/domain-whois-apis/whoapi/4990-yearly-business-yearly-get-live-whois-api/llms.txt): $4.158 per 1,000, 78% complete, live
- [How.is, pay as you go](https://datacircle.dev/domain-whois-apis/how-is/pay-as-you-go/llms.txt): $5.00 per 1,000, 56% complete, live
- [fetcher.cloud, pay as you go](https://datacircle.dev/domain-whois-apis/fetcher-cloud/pay-as-you-go/llms.txt): $5.00 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 2026-11-09.

- https://fiatdock.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://fiatdock.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://fiatdock.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://fiatdock.com/privacy.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://fiatdock.com/terms.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://fiatdock.com/tools?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://fiatdock.com/tools/domain_intel?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing