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Keen IO vs NASA APOD

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

APIKeen IOUNMONITORED—NASA APODHEALTHY—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedPublic domain (US Gov)
Free tierFree tier — key may be required1,000 req/hour with free key
Rate limitUnpublishedDEMO_KEY: 30/hour, 50/day
In directory since2026-07-052026-05-02
operationalpartialdownno data

Keen IO vs NASA APOD: common questions

Which is more reliable, Keen IO or NASA APOD?

Only NASA APOD 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 Keen IO and NASA APOD need an API key?

Both ask you to authenticate — Keen IO uses an API key and NASA APOD uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call Keen IO and NASA APOD from the browser?

Only NASA APOD is browser-friendly — it returns CORS headers over HTTPS. Keen IO needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Keen IO and NASA APOD free for commercial use?

Keen IO has unclear commercial terms, and NASA APOD 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.