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Numverify vs SampleAPIs

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

APINumverifyHEALTHY96SampleAPIsHEALTHY95
Uptime · 30d
Uptime · 90d100%99.44%
Uptime · 30d100%98.3%
P50 · ms292347
P95 · ms14881747
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree — limits not published
Rate limitUnpublished5000 req/window · 3876 remaining · resets 1783516346
In directory since2026-07-052026-07-05
operationalpartialdownno data

Numverify vs SampleAPIs: common questions

Which is more reliable, Numverify or SampleAPIs?

On our scheduled checks, Numverify leads on measured uptime — Numverify at 100% versus SampleAPIs at 99.44% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Numverify or SampleAPIs?

Numverify has the lower median latency in our checks — Numverify responds in 292 ms versus SampleAPIs at 347 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Numverify and SampleAPIs need an API key?

SampleAPIs needs no key, while Numverify requires a free API key. If you want to start calling without signup, reach for SampleAPIs first.

Can I call Numverify and SampleAPIs from the browser?

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

Are Numverify and SampleAPIs free for commercial use?

Numverify has unclear commercial terms, and SampleAPIs has unclear commercial terms. 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.