# RDAPAPI, $9 monthly: Domain WHOIS API

> Clean JSON for any domain across 1,200+ TLDs, including the ones RDAP still doesn't cover. We find the right server, manage rate limits, and pull registrar data when it lives there.

RDAPAPI's domain WHOIS API on its Starter plan. It costs $0.30 per 1,000 domains. RDAPAPI's docs list all 9 fields on our checklist: Registrant, Registrar, Created on, Updated on, Expires on, Name servers, Statuses, DNSSEC, Abuse contact.
We haven't run RDAPAPI through [our domain WHOIS API benchmark](https://datacircle.dev/best-domain-whois-api.txt) yet.
Half of the 316 plans we rank by price cost $1.495 per 1,000 domains or less. This plan costs less per 1,000 domains than 88% of the 316 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.
[Robtex](https://datacircle.dev/domain-whois-apis/robtex/free/llms.txt), [DomScan](https://datacircle.dev/domain-whois-apis/domscan/6-monthly-starter-post-v1-whois-bulk/llms.txt) and [WhoisFreaks](https://datacircle.dev/domain-whois-apis/whoisfreaks/200-monthly-monthly-subscription-150000-api-credits-post-v2-0-bulkwhois-live/llms.txt) are the best domain WHOIS API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/domain-whois-apis/rdapapi/9-monthly
- [Domain WHOIS API: the 13 best providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://rdapapi.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `GET https://rdapapi.io/api/v1/domain/{domain}`
- API key: with the plan, on https://rdapapi.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Its API docs: https://rdapapi.io/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing#tag/domain/GET/domain/{domain}
- Sold by: RDAPAPI (https://rdapapi.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-07

## In the answer

- Completeness: 100%
- Registrant: ✓
- Registrar: ✓
- Created on: ✓
- Updated on: ✓
- Expires on: ✓
- Name servers: ✓
- Statuses: ✓
- DNSSEC: ✓
- Abuse contact: ✓

## Price

- $ per 1,000 domains: $0.30
- Per: call
- Billing: monthly
- $ a month: $9

## Charges

- Also pays for: from the same budget: IP Address Lookup · ASN Lookup · Nameserver Lookup · Entity Lookup

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.30

## In their words

- Their pitch: Clean JSON for any domain across 1,200+ TLDs, including the ones RDAP still doesn't cover. We find the right server, manage rate limits, and pull registrar data when it lives there.

## Data

- Freshness: 48 hours
- Keep data: no limit
- Use data: You agree not to: Use the Service for any unlawful purpose. Attempt to circumvent rate limits or usage quotas. Resell API access without prior written consent. Interfere with or disrupt the Service infrastructure. Use the Service to harvest personal data in violation of applicable privacy laws.

## Plan

- Pay: $9
- You get: 30,000 requests a month
- Enough for: 30,000 calls a month

## Rate limit

- Per second: 0.5
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain. Optional: follow, whois
- Method: GET
- Path: /domain/{domain}

## About the plan

- Plan: Starter
- Who can get it: anyone with an account

## The 64 fields the plan's answer can hold

domain name, Unicode domain name, domain handle, domain status, registrar name, registrar IANA ID, registrar abuse email, registrar abuse phone, registrar URL, creation date, expiration date, updated date, name servers, DNSSEC, registrant handle, registrant name, registrant organization, registrant email, registrant phone, registrant address, registrant contact URL, registrant country code, administrative handle, administrative name, administrative organization, administrative email, administrative phone, administrative address, administrative contact URL, administrative country code, technical handle, technical name, technical organization, technical email, technical phone, technical address, technical contact URL, technical country code, billing handle, billing name, billing organization, billing email, billing phone, billing address, billing contact URL, billing country code, abuse handle, abuse name, abuse organization, abuse email, abuse phone, abuse address, abuse contact URL, abuse country code, redaction details, answering server, data protocol (RDAP or WHOIS), RDAP server, raw RDAP URL, served from cache, cache expiry time, registrar contacts followed, registrar RDAP server, follow error

## RDAPAPI's plans (6)

- [RDAPAPI, $9 monthly](https://datacircle.dev/domain-whois-apis/rdapapi/9-monthly/llms.txt): $0.30 per 1,000, 100% complete, 48 hours
- [RDAPAPI, $49 monthly, Pro, GET /domain/{domain}](https://datacircle.dev/domain-whois-apis/rdapapi/49-monthly-pro-get-domain-domain/llms.txt): $0.245 per 1,000, 100% complete, 48 hours
- [RDAPAPI, $199 monthly, Business, GET /domain/{domain}](https://datacircle.dev/domain-whois-apis/rdapapi/199-monthly-business-get-domain-domain/llms.txt): $0.199 per 1,000, 100% complete, 48 hours
- [RDAPAPI, $90 yearly](https://datacircle.dev/domain-whois-apis/rdapapi/90-yearly/llms.txt): $0.25 per 1,000, 100% complete, 48 hours
- [RDAPAPI, $490 yearly, Pro, GET /domain/{domain}](https://datacircle.dev/domain-whois-apis/rdapapi/490-yearly-pro-get-domain-domain/llms.txt): $0.204 per 1,000, 100% complete, 48 hours
- [RDAPAPI, $1,990 yearly, Business, GET /domain/{domain}](https://datacircle.dev/domain-whois-apis/rdapapi/1990-yearly-business-get-domain-domain/llms.txt): $0.166 per 1,000, 100% complete, 48 hours

## RDAPAPI's calls (2)

- `GET /domain/{domain}`: [RDAPAPI, $9 monthly](https://datacircle.dev/domain-whois-apis/rdapapi/9-monthly/llms.txt)
- `POST /domains/bulk`: [RDAPAPI, $49 monthly, Pro, POST /domains/bulk](https://datacircle.dev/domain-whois-apis/rdapapi/49-monthly-pro-post-domains-bulk/llms.txt)

## RDAPAPI's APIs (1)

- [RDAPAPI: domain WHOIS API pricing, 6 plans](https://datacircle.dev/domain-whois-apis/rdapapi/9-monthly/llms.txt)

## RDAPAPI: domain WHOIS API alternatives

- [WhoisJsonAPI, $129 monthly, Premium, GET /v1/{domain}](https://datacircle.dev/domain-whois-apis/whoisjsonapi/129-monthly-premium-get-v1-domain/llms.txt): $0.258 per 1,000, 78% complete, 24 hours
- [WhoisJSON, $100 yearly](https://datacircle.dev/domain-whois-apis/whoisjson/100-yearly/llms.txt): $0.278 per 1,000, 89% complete, 3 hours
- [HackerTarget, $2,400 yearly](https://datacircle.dev/domain-whois-apis/hackertarget/2400-yearly/llms.txt): $0.329 per 1,000, 89% complete, live
- [domainIQ, $149.95 monthly, Expert, GET /api, 15,000 requests a day](https://datacircle.dev/domain-whois-apis/domainiq/149-95-monthly-expert-get-api-15000-requests-a-day/llms.txt): $0.333 per 1,000, 56% 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 2026-11-07.

- https://rdapapi.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://rdapapi.io/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://rdapapi.io/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://rdapapi.io/openapi.yaml?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://rdapapi.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://rdapapi.io/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing