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ClinicalTrials.gov vs COVID-19 Tracker Sri Lanka

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

APIClinicalTrials.govNEW—COVID-19 Tracker Sri LankaNEW—
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 COVID-19 Tracker Sri Lanka: common questions

Which is more reliable, ClinicalTrials.gov or COVID-19 Tracker Sri Lanka?

On our scheduled checks, COVID-19 Tracker Sri Lanka leads on measured uptime — ClinicalTrials.gov at —% versus COVID-19 Tracker Sri Lanka 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 COVID-19 Tracker Sri Lanka need an API key?

Neither needs a paid key — ClinicalTrials.gov is callable with no signup, and COVID-19 Tracker Sri Lanka is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call ClinicalTrials.gov and COVID-19 Tracker Sri Lanka from the browser?

Only ClinicalTrials.gov is browser-friendly — it returns CORS headers over HTTPS. COVID-19 Tracker Sri Lanka needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are ClinicalTrials.gov and COVID-19 Tracker Sri Lanka free for commercial use?

ClinicalTrials.gov has unclear commercial terms, and COVID-19 Tracker Sri Lanka 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.