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Fed Treasury vs Municipal Finance API

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

APIFed TreasuryNEW—Municipal Finance APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licenseOpen U.S. Government data (public domain)Unverified
Free tierFree — no API keyFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Fed Treasury vs Municipal Finance API: common questions

Which is more reliable, Fed Treasury or Municipal Finance API?

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

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

Can I call Fed Treasury and Municipal Finance API from the browser?

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

Are Fed Treasury and Municipal Finance API free for commercial use?

Fed Treasury allows commercial use on its free tier, 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.