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ClinicalTrials.gov vs FoodData Central

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

APIClinicalTrials.govNEW—FoodData CentralNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key may be required for production
Rate limitUnpublished10 req/window · 9 remaining
In directory since2026-07-052026-07-05
operationalpartialdownno data

ClinicalTrials.gov vs FoodData Central: common questions

Which is more reliable, ClinicalTrials.gov or FoodData Central?

On our scheduled checks, FoodData Central leads on measured uptime — ClinicalTrials.gov at —% versus FoodData Central 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 FoodData Central need an API key?

ClinicalTrials.gov needs no key, while FoodData Central requires a free API key. If you want to start calling without signup, reach for ClinicalTrials.gov first.

Can I call ClinicalTrials.gov and FoodData Central from the browser?

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

ClinicalTrials.gov has unclear commercial terms, and FoodData Central 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.