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Nexmo API vs The Calendar

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

APINexmo APIHEALTHY93The CalendarHEALTHY90
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms567588
P95 · ms12213550
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified (US federal list per 5 U.S.C. § 6103)
Free tierFree tier — API key requiredFree, no auth (per site)
Rate limit10, 120;w=60;name="crd|generic_key^nexmo-gloo.sanity-service-remote-address-120-rpm|remote_address", 10;w=1;name="crd|generic_key^nexmo-gloo.sanity-service-remote-address-10-rps|remote_address" req/window · 9 remaining · resets 1None stated (site advertises no rate limit)
In directory since2026-07-052026-07-05
operationalpartialdownno data

Nexmo API vs The Calendar: common questions

Which is more reliable, Nexmo API or The Calendar?

Both are neck-and-neck — Nexmo API and The Calendar 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, Nexmo API or The Calendar?

Nexmo API has the lower median latency in our checks — Nexmo API responds in 567 ms versus The Calendar at 588 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 Nexmo API and The Calendar need an API key?

The Calendar needs no key, while Nexmo API requires a free API key. If you want to start calling without signup, reach for The Calendar first.

Can I call Nexmo API and The Calendar from the browser?

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

Are Nexmo API and The Calendar free for commercial use?

Nexmo API has unclear commercial terms, and The Calendar 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.