# Pipeworx, free, Anonymous, POST /rdap/mcp: Domain WHOIS API

> Domain registration record from RDAP — registrar, registration/expiry dates, nameservers, status, a “domain not found” answer means the name is UNREGISTERED. Keyless and authoritative (the registry’s own service, the modern replacement for WHOIS).

Pipeworx's Anonymous plan for the domain WHOIS API costs $0.00 per 1,000 domains. We check each provider's docs for 9 fields. Pipeworx's docs list 5: Registrar, Created on, Expires on, Name servers, Statuses.
We haven't run Pipeworx through [our domain WHOIS API benchmark](https://datacircle.dev/best-domain-whois-api.txt) yet.
This plan is free. We rank 400 plans for domain WHOIS APIs by price. Half the plans cost $1.50 or less per 1,000 domains. [See the best free domain WHOIS API plan.](https://datacircle.dev/best-domain-whois-api.txt)
[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.
[Enterno](https://datacircle.dev/domain-whois-apis/enterno/free-open-api/llms.txt), [IPAddress.to](https://datacircle.dev/domain-whois-apis/ipaddress-to/free/llms.txt) and [Robtex](https://datacircle.dev/domain-whois-apis/robtex/free/llms.txt) are the best domain WHOIS API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/domain-whois-apis/pipeworx/free-anonymous-post-rdap-mcp
- [Domain WHOIS API: the 19 best of 80+ providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://pipeworx.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `POST https://gateway.pipeworx.io/rdap/mcp`
- API key: not needed
- Its API docs: https://pipeworx.io/docs/reference/rdap/domain?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Sold by: Pipeworx (https://pipeworx.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-08

## In the answer

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

## Price

- $ per 1,000 domains: $0.00
- Per: call
- Billing: free

## Charges

- Also pays for: from the same budget: 7,187 other calls

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Domain registration record from RDAP — registrar, registration/expiry dates, nameservers, status, a “domain not found” answer means the name is UNREGISTERED. Keyless and authoritative (the registry’s own service, the modern replacement for WHOIS).

## Data

- Keep data: no limit
- Use data: You agree not to: Use the Service for any unlawful purpose, Attempt to gain unauthorized access to other users' data or accounts, Exceed rate limits or abuse the Service in a way that degrades performance for others, Resell or redistribute access to the Service without permission, Use the Service to send spam, phishing, or other unsolicited communications

## Plan

- Pay: $0
- You get: 50 requests a day
- Enough for: 50 calls a day

## Rate limit

- Per day: 50
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: Content-Type header "application/json", jsonrpc "2.0", id, method "tools/call", params.name "domain". Optional: params.arguments.name, params.arguments.domain, params.arguments.base
- Method: POST
- Path: /rdap/mcp

## About the plan

- Plan: Anonymous
- Who can get it: anyone, with no signup and no API key (not from a comprehensively sanctioned jurisdiction nor on a restricted-party list: terms, section 5)

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

registered, registrar, creation date, expiration date, name servers, status

## Pipeworx's plans (8)

- [Pipeworx, free, Anonymous, POST /rdap/mcp](https://datacircle.dev/domain-whois-apis/pipeworx/free-anonymous-post-rdap-mcp/llms.txt): $0.00 per 1,000, 56% complete
- [Pipeworx, free, Registered (Free), POST /rdap/mcp](https://datacircle.dev/domain-whois-apis/pipeworx/free-registered-free-post-rdap-mcp/llms.txt): $0.00 per 1,000, 56% complete
- [Pipeworx, pay as you go, Pay-per-call (x402), POST /rdap/mcp](https://datacircle.dev/domain-whois-apis/pipeworx/pay-as-you-go-pay-per-call-x402-post-rdap-mcp/llms.txt): $10.00 per 1,000, 56% complete
- [Pipeworx, $10 pack, Pay as you go: starter credit pack, POST /rdap/mcp](https://datacircle.dev/domain-whois-apis/pipeworx/10-pack-pay-as-you-go-starter-credit-pack-post-rdap-mcp/llms.txt): 56% complete
- [Pipeworx, $40 pack, Pay as you go: standard credit pack, POST /rdap/mcp](https://datacircle.dev/domain-whois-apis/pipeworx/40-pack-pay-as-you-go-standard-credit-pack-post-rdap-mcp/llms.txt): 56% complete
- [Pipeworx, $150 pack, Pay as you go: pro credit pack, POST /rdap/mcp](https://datacircle.dev/domain-whois-apis/pipeworx/150-pack-pay-as-you-go-pro-credit-pack-post-rdap-mcp/llms.txt): 56% complete
- [Pipeworx, $49 monthly, $49/month, POST /rdap/mcp](https://datacircle.dev/domain-whois-apis/pipeworx/49-monthly-49-month-post-rdap-mcp/llms.txt): 56% complete
- [Pipeworx, $99 monthly, $99/month, POST /rdap/mcp](https://datacircle.dev/domain-whois-apis/pipeworx/99-monthly-99-month-post-rdap-mcp/llms.txt): 56% complete

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

- `POST /domains/mcp`: [Pipeworx, free, Anonymous, POST /domains/mcp](https://datacircle.dev/domain-whois-apis/pipeworx/free-anonymous-post-domains-mcp/llms.txt)
- `POST /rdap/mcp`: [Pipeworx, free, Anonymous, POST /rdap/mcp](https://datacircle.dev/domain-whois-apis/pipeworx/free-anonymous-post-rdap-mcp/llms.txt)

## Pipeworx's APIs (5)

- [Pipeworx: web scraping API pricing, 8 plans](https://datacircle.dev/web-scraping-apis/pipeworx/free-anonymous/llms.txt)
- [Pipeworx: business verification API pricing, 8 plans, POST /ares-cz/mcp](https://datacircle.dev/business-verification-apis/pipeworx/free-anonymous-post-ares-cz-mcp/llms.txt)
- [Pipeworx: business verification API pricing, 8 plans, POST /brreg-no/mcp](https://datacircle.dev/business-verification-apis/pipeworx/free-anonymous-post-brreg-no-mcp/llms.txt)
- [Pipeworx: business verification API pricing, 8 plans, POST /cro-ireland/mcp](https://datacircle.dev/business-verification-apis/pipeworx/free-anonymous-post-cro-ireland-mcp/llms.txt)
- [Pipeworx: business verification API pricing, 8 plans, POST /estonia-business-register/mcp](https://datacircle.dev/business-verification-apis/pipeworx/free-anonymous-post-estonia-business-register-mcp/llms.txt)
- [Pipeworx: business verification API pricing, 8 plans, POST /gleif/mcp, GLEIF get_lei](https://datacircle.dev/business-verification-apis/pipeworx/free-anonymous-post-gleif-mcp-gleif-get-lei/llms.txt)
- [Pipeworx: business verification API pricing, 8 plans, POST /gleif/mcp, GLEIF search_lei](https://datacircle.dev/business-verification-apis/pipeworx/free-anonymous-post-gleif-mcp-gleif-search-lei/llms.txt)
- [Pipeworx: news API pricing, 8 plans, POST /bing-news/mcp](https://datacircle.dev/news-apis/pipeworx/free-anonymous-post-bing-news-mcp/llms.txt)
- [Pipeworx: news API pricing, 8 plans, POST /gdelt/mcp](https://datacircle.dev/news-apis/pipeworx/free-anonymous-post-gdelt-mcp/llms.txt)
- [Pipeworx: domain WHOIS API pricing, 8 plans, POST /rdap/mcp](https://datacircle.dev/domain-whois-apis/pipeworx/free-anonymous-post-rdap-mcp/llms.txt)
- [Pipeworx: IP company lookup API pricing, 8 plans, POST /hackertarget/mcp](https://datacircle.dev/ip-company-lookup-apis/pipeworx/free-anonymous-post-hackertarget-mcp/llms.txt)
- [Pipeworx: IP company lookup API pricing, 8 plans, POST /ipinfo/mcp](https://datacircle.dev/ip-company-lookup-apis/pipeworx/free-anonymous-post-ipinfo-mcp/llms.txt)
- [Pipeworx: IP company lookup API pricing, 8 plans, POST /ipquery/mcp](https://datacircle.dev/ip-company-lookup-apis/pipeworx/free-anonymous-post-ipquery-mcp/llms.txt)

## Pipeworx: domain WHOIS API alternatives

- [Unstuckapi, $10 pack](https://datacircle.dev/domain-whois-apis/unstuckapi/10-pack/llms.txt): $10.00 per 1,000, 78% complete
- [DomainDrift, pay as you go](https://datacircle.dev/domain-whois-apis/domaindrift/pay-as-you-go/llms.txt): $10.00 per 1,000, 56% complete, 102 days
- [DomainRef, pay as you go, Pay per call, GET /v1/domain/check](https://datacircle.dev/domain-whois-apis/domainref/pay-as-you-go-pay-per-call-get-v1-domain-check/llms.txt): $10.00 per 1,000, 44% complete, live
- [DomainHelp, pay as you go, Pay per call with x402, 1 to 9 domains a request, GET /api/v1/domain/{domain}](https://datacircle.dev/domain-whois-apis/domainhelp/pay-as-you-go-pay-per-call-with-x402-1-to-9-domains-a-request-get-api-v1-domain-domain/llms.txt): $10.00 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 2026-11-08.

- https://pipeworx.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://pipeworx.io/docs/guides/rate-limits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://pipeworx.io/docs/reference/rdap?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://pipeworx.io/docs/reference/rdap/domain?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://pipeworx.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://pipeworx.io/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing