# AgentPay Lookup, free: Domain WHOIS API

> Domain registration data (registrar, created/expires, status, nameservers) via RDAP.

AgentPay Lookup's Free trial key plan for the domain WHOIS API costs $0.00 per 1,000 domains. We check each provider's docs for 9 fields. AgentPay Lookup's docs list 5: Registrar, Created on, Expires on, Name servers, Statuses.
We haven't run AgentPay Lookup 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/agentpay-lookup/free
- [Domain WHOIS API in 2026: the best of 20+ providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://agentpay-lookup.agentpay-apis.workers.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `GET https://agentpay-lookup.agentpay-apis.workers.dev/lookup/v1/whois`
- API key: with the plan, on https://agentpay-lookup.agentpay-apis.workers.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Its API docs: https://agentpay-lookup.agentpay-apis.workers.dev/lookup/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Sold by: AgentPay Lookup (https://agentpay-lookup.agentpay-apis.workers.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-09

## 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: extract_page · lookup_dns · lookup_domain_report · lookup_ip · tools_feed · tools_pdf_text · tools_sitemap

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Domain registration data (registrar, created/expires, status, nameservers) via RDAP.

## Data

- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $0
- You get: $0.05
- Enough for: 5 calls

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain
- Method: GET
- Path: /lookup/v1/whois

## About the plan

- Plan: Free trial key
- Who can get it: anyone, one key per network per day

## The 8 fields the plan's answer can hold

domain, registered, registrar, created date, expiry date, status, name servers, data source

## AgentPay Lookup's plans (5)

- [AgentPay Lookup, free](https://datacircle.dev/domain-whois-apis/agentpay-lookup/free/llms.txt): $0.00 per 1,000, 56% complete
- [AgentPay Lookup, pay as you go](https://datacircle.dev/domain-whois-apis/agentpay-lookup/pay-as-you-go/llms.txt): $10.00 per 1,000, 56% complete
- [AgentPay Lookup, top-up from $1](https://datacircle.dev/domain-whois-apis/agentpay-lookup/top-up-from-1/llms.txt): $10.00 per 1,000, 56% complete
- [AgentPay Lookup, top-up from $5](https://datacircle.dev/domain-whois-apis/agentpay-lookup/top-up-from-5/llms.txt): $9.091 per 1,000, 56% complete
- [AgentPay Lookup, top-up from $20](https://datacircle.dev/domain-whois-apis/agentpay-lookup/top-up-from-20/llms.txt): $8.333 per 1,000, 56% complete

## AgentPay Lookup's calls for this API (1)

- `GET /lookup/v1/whois`: [AgentPay Lookup, free](https://datacircle.dev/domain-whois-apis/agentpay-lookup/free/llms.txt)

## AgentPay Lookup's APIs (2)

- [AgentPay Lookup: domain WHOIS API pricing, 5 plans](https://datacircle.dev/domain-whois-apis/agentpay-lookup/free/llms.txt)
- [AgentPay Lookup: IP company lookup API pricing, 5 plans](https://datacircle.dev/ip-company-lookup-apis/agentpay-lookup/free/llms.txt)

## AgentPay Lookup: domain WHOIS API alternatives

- [x402 Vending Machine, pay as you go](https://datacircle.dev/domain-whois-apis/x402-vending-machine/pay-as-you-go/llms.txt): $8.00 per 1,000, 22% complete, live
- [ToolCall, pay as you go](https://datacircle.dev/domain-whois-apis/toolcall/pay-as-you-go/llms.txt): $8.00 per 1,000, 11% complete
- [ScrapeWhale, $49.90 pack](https://datacircle.dev/domain-whois-apis/scrapewhale/49-90-pack/llms.txt): $8.317 per 1,000, 78% complete, 7 days
- [ViewDNS.info, $209 monthly](https://datacircle.dev/domain-whois-apis/viewdns-info/209-monthly/llms.txt): $8.36 per 1,000, 89% 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 2026-11-09.

- https://agentpay-lookup.agentpay-apis.workers.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://agentpay-lookup.agentpay-apis.workers.dev/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://agentpay-lookup.agentpay-apis.workers.dev/lookup/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://agentpay-lookup.agentpay-apis.workers.dev/lookup/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://agentpay-lookup.agentpay-apis.workers.dev/pay?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://raw.githubusercontent.com/noah-silver/agentpay/main/README.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing