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Clockify API vs staffSign

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

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

Clockify API vs staffSign: common questions

Which is more reliable, Clockify API or staffSign?

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

Both ask you to authenticate — Clockify API uses an API key and staffSign 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 Clockify API and staffSign from the browser?

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

Are Clockify API and staffSign free for commercial use?

Clockify API has unclear commercial terms, and staffSign 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.