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Randommer vs SLA Uptime Calculator

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

APIRandommerNEW—SLA Uptime CalculatorNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Randommer vs SLA Uptime Calculator: common questions

Which is more reliable, Randommer or SLA Uptime Calculator?

On our scheduled checks, SLA Uptime Calculator leads on measured uptime — Randommer at —% versus SLA Uptime Calculator 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 Randommer and SLA Uptime Calculator need an API key?

SLA Uptime Calculator needs no key, while Randommer requires a free API key. If you want to start calling without signup, reach for SLA Uptime Calculator first.

Can I call Randommer and SLA Uptime Calculator from the browser?

Yes — both Randommer and SLA Uptime Calculator send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Randommer and SLA Uptime Calculator free for commercial use?

Randommer has unclear commercial terms, and SLA Uptime Calculator 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.