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MarketAux vs Voidly

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

APIMarketAuxDEAD0VoidlyHEALTHY78
Uptime · 30d
Uptime · 90d0.0%100%
Uptime · 30d0.0%100%
P50 · ms—1238
P95 · ms—3894
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedCC BY 4.0
Free tierFree tier — token requiredFree (keyless data endpoints; Hydra ML endpoints need a key)
Rate limit100 requests/day on free planUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

MarketAux vs Voidly: common questions

Which is more reliable, MarketAux or Voidly?

On our scheduled checks, Voidly leads on measured uptime — MarketAux at 0.0% versus Voidly at 100% 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 MarketAux and Voidly need an API key?

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

Can I call MarketAux and Voidly from the browser?

Only Voidly is browser-friendly — it returns CORS headers over HTTPS. MarketAux needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are MarketAux and Voidly free for commercial use?

MarketAux has unclear commercial terms, and Voidly allows commercial use on its free tier. 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.