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Quandl vs REST Countries

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

APIQuandlUNMONITORED—REST CountriesHEALTHY—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedMPL-2.0
Free tierFree — limits not publishedUnlimited
Rate limitUnpublishedNone published
In directory since2026-07-052026-05-02
operationalpartialdownno data

Quandl vs REST Countries: common questions

Which is more reliable, Quandl or REST Countries?

Only REST Countries 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 Quandl and REST Countries need an API key?

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

Can I call Quandl and REST Countries from the browser?

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

Are Quandl and REST Countries free for commercial use?

Quandl has unclear commercial terms, and REST Countries 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.