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Yahoo Finance Chart vs YNAB

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

APIYahoo Finance ChartNEW—YNABNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Yahoo Finance Chart vs YNAB: common questions

Which is more reliable, Yahoo Finance Chart or YNAB?

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

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

Can I call Yahoo Finance Chart and YNAB from the browser?

Only YNAB 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 Yahoo Finance Chart and YNAB free for commercial use?

Yahoo Finance Chart has unclear commercial terms, and YNAB 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.