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Complete Criminal Checks vs SniffCat

Same instrument, two spec sheets — measured, not claimed.

APIComplete Criminal ChecksDEAD0SniffCatREACHABLE83
Uptime · 30d
Uptime · 90d0.0%83.3%
Uptime · 30d0.0%83.3%
P50 · ms—290
P95 · ms—598
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverified
Free tierFree tier — API key required
Rate limitUnpublishedRetry-After: 24s
In directory since2026-07-052026-08-19
operationalpartialdownno data

Complete Criminal Checks vs SniffCat: common questions

Which is more reliable, Complete Criminal Checks or SniffCat?

On our scheduled checks, SniffCat leads on measured uptime — Complete Criminal Checks at 0.0% versus SniffCat at 83.3% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Complete Criminal Checks and SniffCat need an API key?

Both ask you to authenticate — Complete Criminal Checks uses an API key and SniffCat uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call Complete Criminal Checks and SniffCat from the browser?

Only Complete Criminal Checks is browser-friendly — it returns CORS headers over HTTPS. SniffCat needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Complete Criminal Checks and SniffCat free for commercial use?

Complete Criminal Checks has unclear commercial terms, and SniffCat allows commercial use on its free tier. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.