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Fixer vs Municipal Finance API

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

APIFixerNEW—Municipal Finance APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
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

Fixer vs Municipal Finance API: common questions

Which is more reliable, Fixer or Municipal Finance API?

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

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

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

Yes — both Fixer and Municipal Finance API send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Fixer and Municipal Finance API free for commercial use?

Fixer 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.