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WhoisJSON Review

Worth it

Should I use WhoisJSON?

WHOIS, DNS, SSL & domain availability API — 1,000 free requests per month - whoisjson.com

· 1 month ago

Buy if you're a developer or small team needing WHOIS/DNS/SSL data in code — the free 1,000 requests/month makes trialing it risk-free. Skip it if you want a point-and-click UI, enterprise threat intel, or guaranteed support.

Confidence

Medium. Based on ~14 public sources; independent review coverage is thin and no named customers were found.

Ratings

  • Value for money
  • Ease of use
  • Feature depth
  • Support qualityNo support evidence in sources
  • Security posture

Pricing

Free

Basic

ModelNot disclosed
Monthly feesNot disclosed
HardwareNot disclosed
Free tierYes
Paid plansNot stated in reviewed sources

Best for

  • Developers building domain checks
  • Fraud and phishing investigation
  • Domain portfolio monitoring
  • AI agent workflows via MCP

Not for

  • Non-technical buyers — it's a raw API, no GUI
  • Enterprises needing DomainTools-grade threat intel
  • One-off lookups — free whois/DNS tools already exist
  • Guess: teams requiring SLAs or compliance attestations

Gotchas - check before you buy

medium

1,000 free calls/month disappears fast in production; growth pushes you to paid plans

medium

Expect HTTP 429 rate-limit errors — budget retry/backoff code before launch

medium

Integrately/MindCloud integrations add those platforms' own limits and pricing

low

DomainTools comparison is the vendor's own blog; independent price benchmarks are scarce

Pros and cons

Pros

  • Free tier: 1,000 requests/month, no credit card
  • All 7 endpoints included on every plan, including free
  • One API covers WHOIS, DNS, SSL, and availability
  • Positions itself well below DomainTools' $99–$500/mo
  • MCP server plus 1-click integrations for thousands of apps

Cons

  • No numeric user ratings found on major review platforms
  • Moderate 68/100 trust score from Gridinsoft
  • Rate limits cause HTTP 429 errors; you build retries
  • No-code integrations depend on third-party marketplaces

Sources & method

- 14 sources - No known vulnerabilities found in the sources reviewed.

official x7review x6security x1

Key stats

  • Value for money: 4/5

    Rating

  • Free

    Starting price

  • 14

    Sources

  • Analyzed

  • Value for money: 4/5. Free tier; undercuts DomainTools' $99–$500/mo
  • Ease of use: 4/5. JSON output, 1-click integrations, MCP server
  • Feature depth: 4/5. Seven endpoints plus domain monitoring alerts
  • Support quality. No support evidence in sources
  • Security posture: 3/5. Security page published; 68/100 trust score
  • 1,000 req/mo Free tier No credit card required
  • 7 API endpoints All included on every plan
  • 3,100+ No-code integrations Via MindCloud; also on Integrately
  • 68/100 Gridinsoft trust score Rated safe, moderate trust

Pricing

Basic

Free

  • 1,000 requests/month
  • All 7 endpoints included
  • No credit card

Paid plans

Not stated in reviewed sources

  • Scalable request volumes
  • All 7 endpoints included

Security

No known vulnerabilities found in the sources reviewed.

What users say

Independent coverage is thin, but a Reddit developer praised the free tier while building a domain monitoring tool on it.

“Domain API: WhoisJSON (1000 free calls/month)”
Reddit, r/sveltejs
Full analysis

Based on ~14 public sources; independent review coverage is thin and no named customers were found.

Cheap developer API for WHOIS/DNS/SSL with a real free tier. Great for code; wrong for GUI-lovers or enterprise intel.

Methodology

Based on ~14 public sources; independent review coverage is thin and no named customers were found.

Read how a report is made.

Sources

  1. WhoisJSON homepagewhoisjson.com
    official
  2. WhoisJSON pricingwhoisjson.com
    official
  3. Free WHOIS API — 1,000 monthly requestswhoisjson.com
    official
  4. Product security pagewhoisjson.com
    official
  5. DomainTools alternative comparisonwhoisjson.com
    official
  6. WHOIS API rate limits and 429 handlingwhoisjson.com
    official
  7. WhoisJSON API Review (2026)itechguides.com
    review
  8. Reddit: open-source domain monitoring toolreddit.com
    review
  9. Gridinsoft trust scangridinsoft.com
    security
  10. WHOISJSON alternatives and comparisonsdomscan.net
    review
  11. Integrately WhoisJSON integrationsintegrately.com
    review
  12. MindCloud WhoisJSON integrationsmindcloud.co
    review
  13. WhoisJSON MCP servermcp.so
    official
  14. APILayer marketplace listingmarketplace.apilayer.com
    review

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