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Marketstack vs Municipal Finance API

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

APIMarketstackNEW—Municipal Finance APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Marketstack vs Municipal Finance API: common questions

Which is more reliable, Marketstack or Municipal Finance API?

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

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

Can I call Marketstack and Municipal Finance API from the browser?

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

Are Marketstack and Municipal Finance API free for commercial use?

Marketstack has unclear commercial terms, and Municipal Finance API 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.