# Blackwood State, pay as you go: Domain WHOIS API

> Returns JSON with domain intelligence: WHOIS/RDAP registration, DNS records (A, AAAA, MX, NS, TXT, CAA), SPF and DMARC, and TLS certificates from certificate transparency logs.

Blackwood State's x402 pay per call plan for the domain WHOIS API costs $20.00 per 1,000 domains. We check each provider's docs for 9 fields. Blackwood State's docs list 7: Registrar, Created on, Updated on, Expires on, Name servers, Statuses, DNSSEC.
We haven't run Blackwood State 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 4% 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/blackwood-state/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://x402-gateway.blackwoodstate8.workers.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `POST https://x402-gateway.blackwoodstate8.workers.dev/v1/domain-intel`
- API key: not needed
- Its API docs: https://x402-gateway.blackwoodstate8.workers.dev/services/domain-intel?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Sold by: Blackwood State (https://x402-gateway.blackwoodstate8.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: $20.00
- Per: call
- Billing: pay as you go

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: Returns JSON with domain intelligence: WHOIS/RDAP registration, DNS records (A, AAAA, MX, NS, TXT, CAA), SPF and DMARC, and TLS certificates from certificate transparency logs.

## Data

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

## Plan

- Pay: per call

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain. Optional: certificates
- Method: POST
- Path: /v1/domain-intel

## About the plan

- Plan: x402 pay per call
- Who can get it: anyone with a wallet paying each call in USDC on Base (x402), with no account or API key

## The 25 fields the plan's answer can hold

domain, registered, registrar, created date, updated date, expiry date, status, name servers, DNSSEC, RDAP server, A records, AAAA records, MX records, NS records, TXT records, CAA records, SPF record, DMARC record, DMARC policy, TLS certificate count, certificate issuer, certificate common name, certificate valid from, certificate valid until, partial sections

## Blackwood State's plans (4)

- [Blackwood State, pay as you go](https://datacircle.dev/domain-whois-apis/blackwood-state/pay-as-you-go/llms.txt): $20.00 per 1,000, 78% complete
- [Blackwood State, $5 pack](https://datacircle.dev/domain-whois-apis/blackwood-state/5-pack/llms.txt): $20.00 per 1,000, 78% complete
- [Blackwood State, $20 pack](https://datacircle.dev/domain-whois-apis/blackwood-state/20-pack/llms.txt): $18.00 per 1,000, 78% complete
- [Blackwood State, $100 pack](https://datacircle.dev/domain-whois-apis/blackwood-state/100-pack/llms.txt): $16.00 per 1,000, 78% complete

## Blackwood State's calls for this API (1)

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

## Blackwood State's APIs (4)

- [Blackwood State: domain WHOIS API pricing, 4 plans](https://datacircle.dev/domain-whois-apis/blackwood-state/pay-as-you-go/llms.txt)
- [Blackwood State: news API pricing, 4 plans](https://datacircle.dev/news-apis/blackwood-state/pay-as-you-go/llms.txt)
- [Blackwood State: web scraping API pricing, 4 plans](https://datacircle.dev/web-scraping-apis/blackwood-state/pay-as-you-go/llms.txt)
- [Blackwood State: email verification API pricing, 4 plans, POST /v1/email-batch](https://datacircle.dev/validate-email-apis/blackwood-state/pay-as-you-go-x402-pay-per-call-post-v1-email-batch/llms.txt)
- [Blackwood State: email verification API pricing, 4 plans, POST /v1/email-check](https://datacircle.dev/validate-email-apis/blackwood-state/pay-as-you-go-x402-pay-per-call-post-v1-email-check/llms.txt)

## Blackwood State: domain WHOIS API alternatives

- [AgentsTools, pay as you go](https://datacircle.dev/domain-whois-apis/agentstools/pay-as-you-go/llms.txt): $15.00 per 1,000, 56% complete
- [ViewDNS.info, $49 monthly](https://datacircle.dev/domain-whois-apis/viewdns-info/49-monthly/llms.txt): $19.60 per 1,000, 89% complete, live
- [SouthPow Media, pay as you go](https://datacircle.dev/domain-whois-apis/southpow-media/pay-as-you-go/llms.txt): $20.00 per 1,000, 67% complete
- [Kadec0, pay as you go, x402 pay per call, GET /v1/domain-info](https://datacircle.dev/domain-whois-apis/kadec0/pay-as-you-go-x402-pay-per-call-get-v1-domain-info/llms.txt): $20.00 per 1,000, 44% complete
- [AgentBIT, pay as you go](https://datacircle.dev/domain-whois-apis/agentbit/pay-as-you-go/llms.txt): $20.00 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://api.cdp.coinbase.com/platform/v2/x402/discovery/resources?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://x402-gateway.blackwoodstate8.workers.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://x402-gateway.blackwoodstate8.workers.dev/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://x402-gateway.blackwoodstate8.workers.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://x402-gateway.blackwoodstate8.workers.dev/services/domain-intel?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing