ClinicalTrials.gov vs Data Dragon API

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

Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms13860
P95 · ms35331428
Authnonenone
CORSyesyes
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 Data Dragon API: common questions

Which is more reliable, ClinicalTrials.gov or Data Dragon API?

Both are neck-and-neck — ClinicalTrials.gov and Data Dragon API each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, ClinicalTrials.gov or Data Dragon API?

Data Dragon API has the lower median latency in our checks — ClinicalTrials.gov responds in 138 ms versus Data Dragon API at 60 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do ClinicalTrials.gov and Data Dragon API need an API key?

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

Can I call ClinicalTrials.gov and Data Dragon API from the browser?

Yes — both ClinicalTrials.gov and Data Dragon API send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are ClinicalTrials.gov and Data Dragon API free for commercial use?

ClinicalTrials.gov has unclear commercial terms, and Data Dragon API 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.