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Serialif Color vs staffSign

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

APISerialif ColorNEW—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

Serialif Color vs staffSign: common questions

Which is more reliable, Serialif Color or staffSign?

On our scheduled checks, staffSign leads on measured uptime — Serialif Color 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 Serialif Color and staffSign need an API key?

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

Can I call Serialif Color and staffSign from the browser?

Neither sends browser-friendly CORS headers reliably, so call Serialif Color 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 Serialif Color and staffSign free for commercial use?

Serialif Color 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.