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Clockify API vs Nationalize.io

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

APIClockify APINEW—Nationalize.ioNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredKeyless usage limited (x-rate-limit-limit: 25 observed); 2,500 names/mo with a free key
Rate limitUnpublishedKeyless cap 25 per x-rate-limit-limit header; remaining/reset exposed in response headers
In directory since2026-07-052026-07-05
operationalpartialdownno data

Clockify API vs Nationalize.io: common questions

Which is more reliable, Clockify API or Nationalize.io?

On our scheduled checks, Nationalize.io leads on measured uptime — Clockify API at —% versus Nationalize.io 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 Nationalize.io need an API key?

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

Can I call Clockify API and Nationalize.io from the browser?

Yes — both Clockify API and Nationalize.io send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Clockify API and Nationalize.io free for commercial use?

Clockify API has unclear commercial terms, and Nationalize.io 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.