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City, Nantes Open Data vs Federal Register

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

APICity, Nantes Open DataNEW—Federal RegisterNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedUS Government work — public domain
Free tierFree tier — key may be requiredFree — no key or signup required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

City, Nantes Open Data vs Federal Register: common questions

Which is more reliable, City, Nantes Open Data or Federal Register?

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

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

Can I call City, Nantes Open Data and Federal Register from the browser?

Yes — both City, Nantes Open Data and Federal Register 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 City, Nantes Open Data and Federal Register free for commercial use?

City, Nantes Open Data has unclear commercial terms, and Federal Register allows commercial use on its free tier. 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.