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QuickChart vs Sheet2API

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

APIQuickChartNEW—Sheet2APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnoyes
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

QuickChart vs Sheet2API: common questions

Which is more reliable, QuickChart or Sheet2API?

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

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

Can I call QuickChart and Sheet2API from the browser?

Only Sheet2API is browser-friendly — it returns CORS headers over HTTPS. QuickChart needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are QuickChart and Sheet2API free for commercial use?

QuickChart 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.