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MotaWord API vs Open Notify

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

APIMotaWord APINEW—Open NotifyDYING—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedn/a
Free tierFree tier — API key requiredUnlimited (volunteer-run)
Rate limitUnpublishedPlease be gentle
In directory since2026-07-052026-05-02
operationalpartialdownno data

MotaWord API vs Open Notify: common questions

Which is more reliable, MotaWord API or Open Notify?

On our scheduled checks, Open Notify leads on measured uptime — MotaWord API at —% versus Open Notify 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 MotaWord API and Open Notify need an API key?

Open Notify needs no key, while MotaWord API requires a free API key. If you want to start calling without signup, reach for Open Notify first.

Can I call MotaWord API and Open Notify from the browser?

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

Are MotaWord API and Open Notify free for commercial use?

MotaWord API has unclear commercial terms, and Open Notify 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.