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Ducks Unlimited vs GeoJS

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

APIDucks UnlimitedUNMONITORED—GeoJSNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree, no API key required
Rate limitUnpublishedUnpublished (no enforced limit stated)
In directory since2026-07-052026-07-05
operationalpartialdownno data

Ducks Unlimited vs GeoJS: common questions

Which is more reliable, Ducks Unlimited or GeoJS?

Only GeoJS 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 Ducks Unlimited and GeoJS need an API key?

Neither needs a paid key — Ducks Unlimited is callable with no signup, and GeoJS is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Ducks Unlimited and GeoJS from the browser?

Yes — both Ducks Unlimited and GeoJS 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 Ducks Unlimited and GeoJS free for commercial use?

Ducks Unlimited has unclear commercial terms, and GeoJS 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.