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Plaid API vs Yahoo Finance Chart

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

APIPlaid APINEW—Yahoo Finance ChartNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Plaid API vs Yahoo Finance Chart: common questions

Which is more reliable, Plaid API or Yahoo Finance Chart?

On our scheduled checks, Yahoo Finance Chart leads on measured uptime — Plaid API at —% versus Yahoo Finance Chart 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 Plaid API and Yahoo Finance Chart need an API key?

Yahoo Finance Chart needs no key, while Plaid API requires a free API key. If you want to start calling without signup, reach for Yahoo Finance Chart first.

Can I call Plaid API and Yahoo Finance Chart from the browser?

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

Are Plaid API and Yahoo Finance Chart free for commercial use?

Plaid API has unclear commercial terms, and Yahoo Finance Chart 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.