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SLA Uptime Calculator vs Spoo.me

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

APISLA Uptime CalculatorHEALTHY82Spoo.meHEALTHY94
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms1373362
P95 · ms27411478
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

SLA Uptime Calculator vs Spoo.me: common questions

Which is more reliable, SLA Uptime Calculator or Spoo.me?

Both are neck-and-neck — SLA Uptime Calculator and Spoo.me each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, SLA Uptime Calculator or Spoo.me?

Spoo.me has the lower median latency in our checks — SLA Uptime Calculator responds in 1373 ms versus Spoo.me at 362 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do SLA Uptime Calculator and Spoo.me need an API key?

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

Can I call SLA Uptime Calculator and Spoo.me from the browser?

Only SLA Uptime Calculator is browser-friendly — it returns CORS headers over HTTPS. Spoo.me needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are SLA Uptime Calculator and Spoo.me free for commercial use?

SLA Uptime Calculator has unclear commercial terms, and Spoo.me 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.