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Municipal Finance API vs Yahoo Finance Chart

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

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

Municipal Finance API vs Yahoo Finance Chart: common questions

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

On our scheduled checks, Yahoo Finance Chart leads on measured uptime — Municipal Finance 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 Municipal Finance API and Yahoo Finance Chart need an API key?

Neither needs a paid key — Municipal Finance API is callable with no signup, and Yahoo Finance Chart is callable with no signup. Both are quick to prototype with; rate limits still apply.

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

Only Municipal Finance 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 Municipal Finance API and Yahoo Finance Chart free for commercial use?

Municipal Finance 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.