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Numverify vs Sheet2API

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

APINumverifyNEW—Sheet2APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Numverify vs Sheet2API: common questions

Which is more reliable, Numverify or Sheet2API?

On our scheduled checks, Sheet2API leads on measured uptime — Numverify at —% versus Sheet2API at —% 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 Numverify and Sheet2API need an API key?

Both ask you to authenticate — Numverify uses an API key and Sheet2API 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 Numverify and Sheet2API from the browser?

Only Sheet2API 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 Sheet2API free for commercial use?

Numverify has unclear commercial terms, and Sheet2API 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.