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ClinicalTrials.gov vs Football-Data.org

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

APIClinicalTrials.govNEW—Football-Data.orgNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ClinicalTrials.gov vs Football-Data.org: common questions

Which is more reliable, ClinicalTrials.gov or Football-Data.org?

On our scheduled checks, Football-Data.org leads on measured uptime — ClinicalTrials.gov at —% versus Football-Data.org at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do ClinicalTrials.gov and Football-Data.org need an API key?

Neither needs a paid key — ClinicalTrials.gov is callable with no signup, and Football-Data.org is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call ClinicalTrials.gov and Football-Data.org from the browser?

Only ClinicalTrials.gov is browser-friendly — it returns CORS headers over HTTPS. Football-Data.org needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are ClinicalTrials.gov and Football-Data.org free for commercial use?

ClinicalTrials.gov has unclear commercial terms, and Football-Data.org 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.