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ReqRes vs UUID Generator

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

APIReqResNEW—UUID GeneratorNEW—
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 limitUnpublished60 req/window · 59 remaining
In directory since2026-07-052026-07-05
operationalpartialdownno data

ReqRes vs UUID Generator: common questions

Which is more reliable, ReqRes or UUID Generator?

On our scheduled checks, UUID Generator leads on measured uptime — ReqRes at —% versus UUID Generator 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 ReqRes and UUID Generator need an API key?

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

Can I call ReqRes and UUID Generator from the browser?

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

Are ReqRes and UUID Generator free for commercial use?

ReqRes has unclear commercial terms, and UUID Generator 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.