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Numverify vs SampleAPIs

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

APINumverifyHEALTHY93SampleAPIsHEALTHY94
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms449471
P95 · ms1488984
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?

Both are neck-and-neck — Numverify and SampleAPIs each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Numverify or SampleAPIs?

Numverify has the lower median latency in our checks — Numverify responds in 449 ms versus SampleAPIs at 471 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.