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Kroki vs Sheet2API

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

APIKrokiNEW—Sheet2APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Kroki vs Sheet2API: common questions

Which is more reliable, Kroki or Sheet2API?

On our scheduled checks, Sheet2API leads on measured uptime — Kroki 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 Kroki and Sheet2API need an API key?

Kroki needs no key, while Sheet2API requires a free API key. If you want to start calling without signup, reach for Kroki first.

Can I call Kroki and Sheet2API from the browser?

Yes — both Kroki and Sheet2API 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 Kroki and Sheet2API free for commercial use?

Kroki 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.