# PapaCasper, pay as you go: Domain WHOIS API

> Look up a domain's WHOIS registration record: registrar, creation and expiry dates, days remaining, name servers, and domain statuses, direct from the TLD registry.

PapaCasper's x402 pay per call plan for the domain WHOIS API costs $10.00 per 1,000 domains. We check each provider's docs for 9 fields. PapaCasper's docs list 5: Registrar, Created on, Expires on, Name servers, Statuses.
We haven't run PapaCasper through [our domain WHOIS API benchmark](https://datacircle.dev/best-domain-whois-api.txt) yet.
We rank 587 plans for domain WHOIS APIs by price. Half the plans cost $1.54 or less per 1,000 domains. This plan costs less per 1,000 domains than 9% of the 587 plans. PapaCasper has no free domain WHOIS API plan. [133 domain WHOIS API plans on our price sheet are free.](https://datacircle.dev/best-domain-whois-api.txt) [WhoisRequest's free plan](https://datacircle.dev/domain-whois-apis/whoisrequest/free-get-api-v1-lookup-whois-domain-name/llms.txt) scores highest of the free plans in our benchmark, at 96.9 out of 100.
[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. [UAPI's CNY 4.90 pack](https://datacircle.dev/domain-whois-apis/uapi/cny-4-90-pack/llms.txt) costs the least for 10,000 domains a month: about $0.73.
[WhoisRequest](https://datacircle.dev/domain-whois-apis/whoisrequest/free-get-api-v1-lookup-whois-domain-name/llms.txt), [thenetworkery](https://datacircle.dev/domain-whois-apis/thenetworkery/free/llms.txt) and [FluentEDI](https://datacircle.dev/domain-whois-apis/fluentedi/free/llms.txt) are the best domain WHOIS API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/domain-whois-apis/papacasper/pay-as-you-go
- [Domain WHOIS API in 2026: the best of 50+ providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://papacasper.com/mcp-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `POST https://papacasper.com/mcp/pay/whois_lookup`
- API key: not needed
- Its API docs: https://papacasper.com/mcp-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Sold by: PapaCasper (https://papacasper.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 56%
- Registrar: ✓
- Created on: ✓
- Expires on: ✓
- Name servers: ✓
- Statuses: ✓

## Price

- $ per 1,000 domains: $10.00
- Per: call
- Billing: pay as you go

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: Look up a domain's WHOIS registration record: registrar, creation and expiry dates, days remaining, name servers, and domain statuses, direct from the TLD registry.

## Data

- Freshness: live
- Keep data: no limit
- Use data: You may use our sites for lawful purposes. Please do not abuse them: no attempts to break into, overload, or disrupt the sites, the MCP Toolbelt, or the public DNS service, and no use of any of them for illegal activity.

## Plan

- Pay: per call

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain
- Method: POST
- Path: /mcp/pay/whois_lookup

## About the plan

- Plan: x402 pay per call
- Who can get it: anyone with a wallet paying each call in USDC on Base through x402, with no signup

## The 6 fields the plan's answer can hold

registrar, created date, expires date, days remaining, name servers, status

## PapaCasper's plans (3)

- [PapaCasper, pay as you go](https://datacircle.dev/domain-whois-apis/papacasper/pay-as-you-go/llms.txt): $10.00 per 1,000, 56% complete, live
- [PapaCasper, $9 monthly](https://datacircle.dev/domain-whois-apis/papacasper/9-monthly/llms.txt): $4.50 per 1,000, 56% complete, live
- [PapaCasper, $29 monthly](https://datacircle.dev/domain-whois-apis/papacasper/29-monthly/llms.txt): $2.90 per 1,000, 56% complete, live

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

- `POST /mcp/pay/whois_lookup`: [PapaCasper, pay as you go](https://datacircle.dev/domain-whois-apis/papacasper/pay-as-you-go/llms.txt)

## PapaCasper's APIs (5)

- [PapaCasper GitHub repository API pricing, 3 plans](https://datacircle.dev/github-repository-apis/papacasper/pay-as-you-go/llms.txt)
- [PapaCasper Tech stack API pricing, 3 plans](https://datacircle.dev/company-technology-apis/papacasper/pay-as-you-go/llms.txt)
- [PapaCasper Domain WHOIS API pricing, 3 plans](https://datacircle.dev/domain-whois-apis/papacasper/pay-as-you-go/llms.txt)
- [PapaCasper Email verification API pricing, 3 plans](https://datacircle.dev/validate-email-apis/papacasper/pay-as-you-go/llms.txt)
- [PapaCasper Web scraping API pricing, 3 plans](https://datacircle.dev/web-scraping-apis/papacasper/pay-as-you-go/llms.txt)

## PapaCasper: domain WHOIS API alternatives

[PapaCasper alternatives: other domain WHOIS API providers by price](https://datacircle.dev/papacasper-alternatives.txt)

We list other providers' plans closest to this plan in price per 1,000 domains. Each plan in the list gives live data.

- [Datakoot, pay as you go, x402 pay per call, POST /api/domain_intel](https://datacircle.dev/domain-whois-apis/datakoot/pay-as-you-go-x402-pay-per-call-post-api-domain-intel/llms.txt): $10.00 per 1,000, 78% complete, live
- [WhoisXML API, $24,000 yearly, Yearly subscription 1,000,000 Queries per month, GET /whoisserver/WhoisService, WHOIS API real-time](https://datacircle.dev/domain-whois-apis/whoisxml-api/24000-yearly-yearly-subscription-1000000-queries-per-month-get-whoisserver-whoisservice-whois-api-real-time/llms.txt): $10.00 per 1,000, 78% complete, live
- [Agent Data Tools, pay as you go](https://datacircle.dev/domain-whois-apis/agent-data-tools/pay-as-you-go/llms.txt): $10.00 per 1,000, 56% complete, live
- [Delx.ai, pay as you go](https://datacircle.dev/domain-whois-apis/delx-ai/pay-as-you-go/llms.txt): $10.00 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 2026-11-10.

- https://papacasper.com/guides/whois-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://papacasper.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://papacasper.com/mcp-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://papacasper.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://papacasper.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing