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ClinicalTrials.gov vs RacingHub

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

APIClinicalTrials.govHEALTHY77RacingHubHEALTHY92
Uptime · 30d
Uptime · 90d99.02%99.02%
Uptime · 30d100%98.3%
P50 · ms243473
P95 · ms5743557
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedCC BY 4.0 (source data from the F1DB project)
Free tierFree — limits not publishedFree — no key required
Rate limitUnpublished100 req/window · 99 remaining · resets 60
In directory since2026-07-052026-07-05
operationalpartialdownno data

ClinicalTrials.gov vs RacingHub: common questions

Which is more reliable, ClinicalTrials.gov or RacingHub?

Both are neck-and-neck — ClinicalTrials.gov and RacingHub each measure 99.02% 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 RacingHub?

ClinicalTrials.gov has the lower median latency in our checks — ClinicalTrials.gov responds in 243 ms versus RacingHub at 473 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 RacingHub need an API key?

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

Can I call ClinicalTrials.gov and RacingHub from the browser?

Yes — both ClinicalTrials.gov and RacingHub 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 RacingHub free for commercial use?

ClinicalTrials.gov has unclear commercial terms, and RacingHub 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.