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Covid Tracking Project vs MedlinePlus Genetics

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

APICovid Tracking ProjectNEW—MedlinePlus GeneticsNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licenseCC BY 4.0U.S. National Library of Medicine (see NLM terms)
Free tierFree — no key required (archived dataset)Free — no key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Covid Tracking Project vs MedlinePlus Genetics: common questions

Which is more reliable, Covid Tracking Project or MedlinePlus Genetics?

On our scheduled checks, MedlinePlus Genetics leads on measured uptime — Covid Tracking Project at —% versus MedlinePlus Genetics 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 Covid Tracking Project and MedlinePlus Genetics need an API key?

Neither needs a paid key — Covid Tracking Project is callable with no signup, and MedlinePlus Genetics is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Covid Tracking Project and MedlinePlus Genetics from the browser?

Yes — both Covid Tracking Project and MedlinePlus Genetics 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 Covid Tracking Project and MedlinePlus Genetics free for commercial use?

Covid Tracking Project allows commercial use on its free tier, and MedlinePlus Genetics 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.