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Free Public APIs API vs MarketAux

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

APIFree Public APIs APINEW—MarketAuxNEW—
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 — token required
Rate limitUnpublished100 requests/day on free plan
In directory since2026-07-052026-07-05
operationalpartialdownno data

Free Public APIs API vs MarketAux: common questions

Which is more reliable, Free Public APIs API or MarketAux?

On our scheduled checks, MarketAux leads on measured uptime — Free Public APIs API at —% versus MarketAux 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 Free Public APIs API and MarketAux need an API key?

Free Public APIs API needs no key, while MarketAux requires a free API key. If you want to start calling without signup, reach for Free Public APIs API first.

Can I call Free Public APIs API and MarketAux from the browser?

Yes — both Free Public APIs API and MarketAux 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 Free Public APIs API and MarketAux free for commercial use?

Free Public APIs API has unclear commercial terms, and MarketAux 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.