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SLA Uptime Calculator vs ipify

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

APISLA Uptime CalculatorUNMONITORED—ipifyHEALTHY—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedn/a
Free tierFree — limits not publishedUnlimited
Rate limitUnpublishedNone
In directory since2026-07-052026-05-02
operationalpartialdownno data

SLA Uptime Calculator vs ipify: common questions

Which is more reliable, SLA Uptime Calculator or ipify?

Only ipify is on our probe schedule so far (—% uptime over 90 days). The other is catalogued but not yet live-checked, so we can't compare measured reliability head-to-head — check the uncovered API's own status page for now.

Do SLA Uptime Calculator and ipify need an API key?

Neither needs a paid key — SLA Uptime Calculator is callable with no signup, and ipify is callable with no signup. Both are quick to prototype with; rate limits still apply.

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

Yes — both SLA Uptime Calculator and ipify 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 SLA Uptime Calculator and ipify free for commercial use?

SLA Uptime Calculator has unclear commercial terms, and ipify allows commercial use on its free tier. 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.