# Agent Extraction API, free: Domain WHOIS API

> Domain registration lookup via RDAP (the official whois successor, IANA bootstrap): registered or not, registrar + IANA id + abuse email, created / updated / expiry dates, days to expiry, domain age, EPP status codes, nameservers, DNSSEC.

Agent Extraction API's Free call plan for the domain WHOIS API costs $0.00 per 1,000 domains. We check each provider's docs for 9 fields. Agent Extraction API's docs list 6: Registrant, Registrar, Name servers, Statuses, DNSSEC, Abuse contact.
You get $1 of credit. You spend the credit on Agent Extraction API's other calls. This call is free for up to 1 call in all.
We haven't run Agent Extraction API through [our domain WHOIS API benchmark](https://datacircle.dev/best-domain-whois-api.txt) yet.
This plan is free. We rank 495 plans for domain WHOIS APIs by price. Half the plans cost $1.575 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.
[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/agent-extraction-api/free
- [Domain WHOIS API in 2026: the best of 20+ providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://freetier-agent-api.pages.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `GET https://freetier-agent-api.pages.dev/api/domain-whois`
- API key: not needed
- Its API docs: https://freetier-agent-api.pages.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing#/paths/~1api~1domain-whois
- Sold by: Agent Extraction API (https://freetier-agent-api.pages.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-09

## In the answer

- Completeness: 67%
- Registrant: ✓
- Registrar: ✓
- Name servers: ✓
- Statuses: ✓
- DNSSEC: ✓
- Abuse contact: ✓

## Price

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

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Domain registration lookup via RDAP (the official whois successor, IANA bootstrap): registered or not, registrar + IANA id + abuse email, created / updated / expiry dates, days to expiry, domain age, EPP status codes, nameservers, DNSSEC.

## Data

- Keep data: no limit
- Use data: Data is provided as is, for information. Each response names its sources and their licenses.

## Plan

- Pay: $0
- You get: $1
- Enough for: 1 call, once
- Expires: never

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain
- Method: GET
- Path: /api/domain-whois

## About the plan

- Plan: Free call
- Who can get it: anyone, no wallet or account

## The 18 fields the plan's answer can hold

domain, registered, handle, registrar name, registrar IANA ID, registrar abuse email, created, updated, expires, days to expiry, age in days, status, nameservers, DNSSEC, registrant, RDAP server, checked at, sources

## Agent Extraction API's plans (5)

- [Agent Extraction API, free](https://datacircle.dev/domain-whois-apis/agent-extraction-api/free/llms.txt): $0.00 per 1,000, 67% complete
- [Agent Extraction API, pay as you go](https://datacircle.dev/domain-whois-apis/agent-extraction-api/pay-as-you-go/llms.txt): $5.00 per 1,000, 67% complete
- [Agent Extraction API, $3 pack](https://datacircle.dev/domain-whois-apis/agent-extraction-api/3-pack/llms.txt): $15.00 per 1,000, 67% complete
- [Agent Extraction API, $12 pack](https://datacircle.dev/domain-whois-apis/agent-extraction-api/12-pack/llms.txt): $12.00 per 1,000, 67% complete
- [Agent Extraction API, $40 pack](https://datacircle.dev/domain-whois-apis/agent-extraction-api/40-pack/llms.txt): $10.00 per 1,000, 67% complete

## Agent Extraction API's calls for this API (1)

- `GET /api/domain-whois`: [Agent Extraction API, free](https://datacircle.dev/domain-whois-apis/agent-extraction-api/free/llms.txt)

## Agent Extraction API's APIs (6)

- [Agent Extraction API: tech stack API pricing, 5 plans](https://datacircle.dev/company-technology-apis/agent-extraction-api/free/llms.txt)
- [Agent Extraction API: domain WHOIS API pricing, 5 plans](https://datacircle.dev/domain-whois-apis/agent-extraction-api/free/llms.txt)
- [Agent Extraction API: news API pricing, 5 plans](https://datacircle.dev/news-apis/agent-extraction-api/free/llms.txt)
- [Agent Extraction API: company enrichment API pricing, 5 plans, GET /api/company-batch](https://datacircle.dev/company-enrichment-apis/agent-extraction-api/free-call-get-api-company-batch/llms.txt)
- [Agent Extraction API: company enrichment API pricing, 5 plans, GET /api/company-profile](https://datacircle.dev/company-enrichment-apis/agent-extraction-api/free-call-get-api-company-profile/llms.txt)
- [Agent Extraction API: email verification API pricing, 5 plans, GET /api/email-verify-quick](https://datacircle.dev/validate-email-apis/agent-extraction-api/free-call-get-api-email-verify-quick/llms.txt)
- [Agent Extraction API: email verification API pricing, 5 plans, GET /api/email-verify-batch](https://datacircle.dev/validate-email-apis/agent-extraction-api/free-call-get-api-email-verify-batch/llms.txt)
- [Agent Extraction API: email verification API pricing, 5 plans, GET /api/email-verify](https://datacircle.dev/validate-email-apis/agent-extraction-api/free-call-get-api-email-verify/llms.txt)
- [Agent Extraction API: web scraping API pricing, 5 plans, GET /api/page-rag](https://datacircle.dev/web-scraping-apis/agent-extraction-api/free-call-get-api-page-rag/llms.txt)
- [Agent Extraction API: web scraping API pricing, 5 plans, GET /api/page-markdown](https://datacircle.dev/web-scraping-apis/agent-extraction-api/free-call-get-api-page-markdown/llms.txt)

## Agent Extraction API: domain WHOIS API alternatives

- [How.is, pay as you go](https://datacircle.dev/domain-whois-apis/how-is/pay-as-you-go/llms.txt): $5.00 per 1,000, 56% complete, live
- [fetcher.cloud, pay as you go](https://datacircle.dev/domain-whois-apis/fetcher-cloud/pay-as-you-go/llms.txt): $5.00 per 1,000, 44% complete, live
- [AgentUtility, pay as you go, Pay per call (x402), POST /whois](https://datacircle.dev/domain-whois-apis/agentutility/pay-as-you-go-pay-per-call-x402-post-whois/llms.txt): $5.00 per 1,000, 67% complete
- [Agent402 Tools, pay as you go](https://datacircle.dev/domain-whois-apis/agent402-tools/pay-as-you-go/llms.txt): $5.00 per 1,000, 56% 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://api.cdp.coinbase.com/platform/v2/x402/discovery/resources?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://freetier-agent-api.pages.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://freetier-agent-api.pages.dev/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://freetier-agent-api.pages.dev/llms-full.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://freetier-agent-api.pages.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing