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ReqRes vs staffSign

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

APIReqResNEW—staffSignNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnono
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

ReqRes vs staffSign: common questions

Which is more reliable, ReqRes or staffSign?

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

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

Can I call ReqRes and staffSign from the browser?

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

Are ReqRes and staffSign free for commercial use?

ReqRes has unclear commercial terms, and staffSign 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.