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CheapShark API vs MarketAux

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

APICheapShark APIHEALTHY88MarketAuxDEAD0
Uptime · 30d
Uptime · 90d99.02%0.0%
Uptime · 30d98.3%0.0%
P50 · ms804—
P95 · ms2483—
AuthnoneapiKey
CORSnono
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

CheapShark API vs MarketAux: common questions

Which is more reliable, CheapShark API or MarketAux?

On our scheduled checks, CheapShark API leads on measured uptime — CheapShark API at 99.02% versus MarketAux at 0.0% 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 CheapShark API and MarketAux need an API key?

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

Can I call CheapShark API and MarketAux from the browser?

Neither sends browser-friendly CORS headers reliably, so call CheapShark API and MarketAux from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are CheapShark API and MarketAux free for commercial use?

CheapShark 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.