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WHO Global Health Observatory API vs Open Library

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

APIWHO Global Health Observatory APIUNMONITORED—Open LibraryHEALTHY—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedMixed — mostly open
Free tierFree — limits not publishedUnlimited within courtesy limits
Rate limitUnpublishedSoft — identified UA appreciated
In directory since2026-07-052026-05-02
operationalpartialdownno data

WHO Global Health Observatory API vs Open Library: common questions

Which is more reliable, WHO Global Health Observatory API or Open Library?

Only Open Library 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 WHO Global Health Observatory API and Open Library need an API key?

Neither needs a paid key — WHO Global Health Observatory API is callable with no signup, and Open Library is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call WHO Global Health Observatory API and Open Library from the browser?

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

Are WHO Global Health Observatory API and Open Library free for commercial use?

WHO Global Health Observatory API has unclear commercial terms, and Open Library 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.