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Brazil Central Bank Open Data vs City, Nantes Open Data

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

APIBrazil Central Bank Open DataNEW—City, Nantes Open DataNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Brazil Central Bank Open Data vs City, Nantes Open Data: common questions

Which is more reliable, Brazil Central Bank Open Data or City, Nantes Open Data?

On our scheduled checks, City, Nantes Open Data leads on measured uptime — Brazil Central Bank Open Data at —% versus City, Nantes Open Data 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 Brazil Central Bank Open Data and City, Nantes Open Data need an API key?

Brazil Central Bank Open Data needs no key, while City, Nantes Open Data requires a free API key. If you want to start calling without signup, reach for Brazil Central Bank Open Data first.

Can I call Brazil Central Bank Open Data and City, Nantes Open Data from the browser?

Yes — both Brazil Central Bank Open Data and City, Nantes Open Data 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 Brazil Central Bank Open Data and City, Nantes Open Data free for commercial use?

Brazil Central Bank Open Data has unclear commercial terms, and City, Nantes Open Data 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.