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RandomDuck vs RescueGroups

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

APIRandomDuckNEW—RescueGroupsNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnono
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 RescueGroups: common questions

Which is more reliable, RandomDuck or RescueGroups?

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

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

Can I call RandomDuck and RescueGroups from the browser?

Neither sends browser-friendly CORS headers reliably, so call RandomDuck and RescueGroups from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are RandomDuck and RescueGroups free for commercial use?

RandomDuck has unclear commercial terms, and RescueGroups 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.