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Poptin API vs staffSign

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

APIPoptin APIREACHABLE100staffSignDEAD0
Uptime · 30d
Uptime · 90d100%0.0%
Uptime · 30d100%0.0%
P50 · ms698—
P95 · ms1705—
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified
Free tierFree tier — API key required
Rate limit120 req/window · 119 remainingUnpublished
In directory since2026-10-042026-07-05
operationalpartialdownno data

Poptin API vs staffSign: common questions

Which is more reliable, Poptin API or staffSign?

On our scheduled checks, Poptin API leads on measured uptime — Poptin API at 100% versus staffSign at 0.0% 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 Poptin API and staffSign need an API key?

Both ask you to authenticate — Poptin API uses an API key and staffSign uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call Poptin API and staffSign from the browser?

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

Are Poptin API and staffSign free for commercial use?

Poptin API 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.