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RandomDuck vs STAPI

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

APIRandomDuckNEW—STAPINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

RandomDuck vs STAPI: common questions

Which is more reliable, RandomDuck or STAPI?

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

Neither needs a paid key — RandomDuck is callable with no signup, and STAPI is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call RandomDuck and STAPI from the browser?

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

Are RandomDuck and STAPI free for commercial use?

RandomDuck has unclear commercial terms, and STAPI 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.