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C99.nl pricing: domain WHOIS API

C99.nl's siteThis page as plain textDomain WHOIS API: the 13 best providers comparedC99.nl: domain WHOIS API alternatives

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0% complete: none of the 9 fields on our checklistSee the 9 fields
$0.033per 1,000 domainsWe ran C99.nl in our domain WHOIS API benchmark. We didn't score any C99.nl plan.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 95% of the 316 plans.Searchwire's $10 pack is the cheapest paid plan per 1,000 domains. Searchwire's domain WHOIS API costs nothing beyond the plan price.Robtex, DomScan and WhoisFreaks are the best domain WHOIS API providers in the Datacircle benchmark.
Type a number to see the cheapest C99.nl plan for that many domains. The table below then sorts the other plans by what each costs.
Plan: Monthly one of C99.nl's 3 plans
Call: GET /whois C99.nl's only call
API: Domain WHOIS API C99.nl's only API

About this item

  • Freshness. We don't know how fresh this plan's data is.
  • Returns none of the 9 fields on our checklist: Registrant, Registrar, Created on, Updated on and 5 more.
  • A monthly subscription. You pay $5 a month for 150,000 requests.
  • One call. You send domain to GET /whois. The call returns the domain's WHOIS record.
  • Anyone can get it. Keep data: no limit. Use data: with conditions.

C99.nl: domain WHOIS API alternatives

C99.nl alternatives: other domain WHOIS API providers by price

We list other providers' plans closest to this plan in price per 1,000 domains.

This planC99.nl, $5 monthlyGuGuData, CNY 49 monthlySugra API, $588 yearly, Pro (billed annually), GET /api/v1/network/domain/{host}/whoisEnterno, ₽12,516 yearlyWhoisJSON, $500 yearly
$ per 1,000 domains$0.033$0.00057$0.032$0.041$0.042
Completeness0%89%78%89%89%
Billingmonthlymonthlyyearlyyearlyyearly
Pay$5CNY 49$588₽12,516$500
Enough for150,000 calls a month12,960,000 calls a month50,000 calls a day10,000 calls a day1,000,000 calls a month
Freshnessunknownunknownunknownlive3 hours
Who can get itanyoneanyone with a GuGuData account, a person or an organizationindividuals and companies, at least 18 years old and not subject to U.S. sanctionsanyone with an accountanyone at least 18 years old (or of legal majority in their jurisdiction), one account per individual or entity

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-04.

  1. api.c99.nl
  2. api.c99.nl/documentation
  3. api.c99.nl/documentation?spec=json
  4. api.c99.nl/faq
  5. api.c99.nl/shop
  6. api.c99.nl/tos

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • Registrant, not in the answer
  • Registrar, not in the answer
  • Created on, not in the answer
  • Updated on, not in the answer
  • Expires on, not in the answer
  • Name servers, not in the answer
  • Statuses, not in the answer
  • DNSSEC, not in the answer
  • Abuse contact, not in the answer
Price
$ per 1,000 domains$0.033
Percall
Billingmonthly
$ a month$5
Charges
Also pays forfrom the same budget: Subdomain Finder · IP Reputation/Malicious IP Checker · Phone Number Lookup · Firewall Detector · Get Hostname · DNS Checker · Gets the IP behind a host · IP to Domains · GeoIP Lookup · Up or Down Checker · URL Reputation Checker · Get HTTP Headers · Link Backup (Archive.org) · Dictionary Lookup · Email Validator · Disposable Email Checker · IP Address Validator · Tor Exit Node Checker · Translate Text · Random Person Generator · YouTube Video Details · View IP Loggers · View IP Logger Logs · Bitcoin Address Balance · Currency Converter · Currency Rates · Currencies · Weather Information · QR Code Generator · Password Generator · License Key Generator · Random Number Generator · Search GIFs
In their words
Their pitchRetrieves WHOIS registration data for a given domain name.
Data
Keep datano limit
Use data"We grant you a limited, non-exclusive, non-transferable, and revocable license to use the C99.nl API for its intended purposes, subject to your compliance with these Terms of Service." [...] "You agree not to engage in any of the following activities: Sharing API Keys: Do not share your API key with others. Your API key is unique to your account and is intended for your use only. Abuse of the API: Do not abuse the API in ways that could disrupt the service for other users. This includes, but is not limited to, excessive requests, spamming, or any activity that places an unreasonable load on our infrastructure. Competitive Use: Do not use the API to create or support any service that directly competes with C99.nl or its offerings. Interception of Connections: Do not use the API key in software or environments where outgoing connections can be intercepted. Illegal Activities: Do not use the API for any illegal, fraudulent, or malicious purposes. Reverse Engineering: Do not attempt to reverse engineer, decompile, or disassemble the API or any part of the Service. Bypassing Restrictions: Do not attempt to bypass any rate limits, security measures, or access controls implemented by C99.nl." [...] "Compliance: You agree to comply with all applicable laws, regulations, and third-party agreements in your use of the API."
Plan
Pay$5
You get150,000 requests a month
Enough for150,000 calls a month
Rate limit
Batch1
Speed
Answerin the call
The call
You senddomain
MethodGET
Path/whois
About the plan
PlanMonthly
Who can get itanyone
The 2 fields the plan's answer can hold

raw WHOIS record, split WHOIS record

Best GTM APIs