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Quandl vs Wikipedia REST

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

APIQuandlUNMONITORED—Wikipedia RESTHEALTHY—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedCC BY-SA 4.0
Free tierFree — limits not publishedUnlimited within etiquette
Rate limitUnpublished200/sec global courtesy cap
In directory since2026-07-052026-05-09
operationalpartialdownno data

Quandl vs Wikipedia REST: common questions

Which is more reliable, Quandl or Wikipedia REST?

Only Wikipedia REST 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 Wikipedia REST need an API key?

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

Can I call Quandl and Wikipedia REST from the browser?

Only Wikipedia REST 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 Wikipedia REST free for commercial use?

Quandl has unclear commercial terms, and Wikipedia REST 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.