# CrowdSpark, pay as you go, x402 pay per call, POST /v1/domain/lookup/batch: Domain WHOIS API

> Batch domain intelligence for due diligence and lead lists: up to 10 domains per call, 60% cheaper than singles. JSON body {domains:[...]}. Each item returns registrar, dates, DNS, SPF, DMARC and HTTPS reachability. Bad items return per-item errors.

CrowdSpark's x402 pay per call plan for the domain WHOIS API costs $1.20 per 1,000 domains. We check each provider's docs for 9 fields. CrowdSpark's docs list 3: Registrar, Created on, Expires on.
We haven't run CrowdSpark 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 79% 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/crowdspark/pay-as-you-go-x402-pay-per-call-post-v1-domain-lookup-batch
- [Domain WHOIS API in 2026: the best of 20+ providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://agents.crowdspark.me/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `POST https://agents.crowdspark.me/v1/domain/lookup/batch`
- API key: not needed
- Its API docs: https://agents.crowdspark.me/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing#/paths/~1v1~1domain~1lookup~1batch
- Sold by: CrowdSpark (https://crowdspark.me?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-09

## In the answer

- Completeness: 33%
- Registrar: ✓
- Created on: ✓
- Expires on: ✓

## Price

- $ per 1,000 domains: $1.20
- Per: result
- Billing: pay as you go

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: Batch domain intelligence for due diligence and lead lists: up to 10 domains per call, 60% cheaper than singles. JSON body {domains:[...]}. Each item returns registrar, dates, DNS, SPF, DMARC and HTTPS reachability. Bad items return per-item errors.

## Data

- Keep data: no limit
- Use data: No unlawful use, no attempts to attack or overload the service or upstream sources, no scraping that breaks a target site's terms. We may rate-limit or block abusive traffic.

## Plan

- Pay: per call

## Rate limit

- Batch: 10

## Speed

- Answer: in the call

## The call

- You send: domains
- Method: POST
- Path: /v1/domain/lookup/batch

## 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 18 fields the plan's answer can hold

count, succeeded, failed, input, ok, registered, registrar, created date, expiry date, A record, AAAA record, MX record, NS record, TXT record, SPF record, DMARC record, HTTPS reachable, HTTPS status

## CrowdSpark's plans (1)

- [CrowdSpark, pay as you go, x402 pay per call, POST /v1/domain/lookup/batch](https://datacircle.dev/domain-whois-apis/crowdspark/pay-as-you-go-x402-pay-per-call-post-v1-domain-lookup-batch/llms.txt): $1.20 per 1,000, 33% complete

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

- `GET /v1/domain/lookup`: [CrowdSpark, pay as you go, x402 pay per call, GET /v1/domain/lookup](https://datacircle.dev/domain-whois-apis/crowdspark/pay-as-you-go-x402-pay-per-call-get-v1-domain-lookup/llms.txt)
- `POST /v1/domain/lookup/batch`: [CrowdSpark, pay as you go, x402 pay per call, POST /v1/domain/lookup/batch](https://datacircle.dev/domain-whois-apis/crowdspark/pay-as-you-go-x402-pay-per-call-post-v1-domain-lookup-batch/llms.txt)

## CrowdSpark's APIs (4)

- [CrowdSpark: domain WHOIS API pricing, 1 plan, POST /v1/domain/lookup/batch](https://datacircle.dev/domain-whois-apis/crowdspark/pay-as-you-go-x402-pay-per-call-post-v1-domain-lookup-batch/llms.txt)
- [CrowdSpark: email verification API pricing, 1 plan, GET /v1/email/check](https://datacircle.dev/validate-email-apis/crowdspark/pay-as-you-go-x402-pay-per-call-get-v1-email-check/llms.txt)
- [CrowdSpark: email verification API pricing, 1 plan, POST /v1/email/check/batch](https://datacircle.dev/validate-email-apis/crowdspark/pay-as-you-go-x402-pay-per-call-post-v1-email-check-batch/llms.txt)
- [CrowdSpark: email verification API pricing, 1 plan, GET /v1/email/full](https://datacircle.dev/validate-email-apis/crowdspark/pay-as-you-go-x402-pay-per-call-get-v1-email-full/llms.txt)
- [CrowdSpark: IP company lookup API pricing, 1 plan, GET /v1/ip/lookup](https://datacircle.dev/ip-company-lookup-apis/crowdspark/pay-as-you-go-x402-pay-per-call-get-v1-ip-lookup/llms.txt)
- [CrowdSpark: IP company lookup API pricing, 1 plan, POST /v1/ip/lookup/batch](https://datacircle.dev/ip-company-lookup-apis/crowdspark/pay-as-you-go-x402-pay-per-call-post-v1-ip-lookup-batch/llms.txt)
- [CrowdSpark: web scraping API pricing, 1 plan, GET /v1/web/safe-read](https://datacircle.dev/web-scraping-apis/crowdspark/pay-as-you-go-x402-pay-per-call-get-v1-web-safe-read/llms.txt)
- [CrowdSpark: web scraping API pricing, 1 plan, GET /v1/web/read](https://datacircle.dev/web-scraping-apis/crowdspark/pay-as-you-go-x402-pay-per-call-get-v1-web-read/llms.txt)
- [CrowdSpark: web scraping API pricing, 1 plan, GET /v1/web/markdown](https://datacircle.dev/web-scraping-apis/crowdspark/pay-as-you-go-x402-pay-per-call-get-v1-web-markdown/llms.txt)

## CrowdSpark: domain WHOIS API alternatives

- [Whoxy, $300 pack](https://datacircle.dev/domain-whois-apis/whoxy/300-pack/llms.txt): $1.20 per 1,000, 78% complete, live
- [jbarkules, pay as you go, x402 pay per call, POST /v1/domain/lookup/batch](https://datacircle.dev/domain-whois-apis/jbarkules/pay-as-you-go-x402-pay-per-call-post-v1-domain-lookup-batch/llms.txt): $1.20 per 1,000, 44% complete
- [SnoopScan, $12 monthly](https://datacircle.dev/domain-whois-apis/snoopscan/12-monthly/llms.txt): $1.20 per 1,000, 44% complete
- [Vee3, $20 monthly, Pro, GET /v1/domains/rdap](https://datacircle.dev/domain-whois-apis/vee3/20-monthly-pro-get-v1-domains-rdap/llms.txt): $1.20 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://agents.crowdspark.me/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://agents.crowdspark.me/llms-full.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://agents.crowdspark.me/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://agents.crowdspark.me/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://crowdspark.me?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing