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City, Nantes Open Data vs Istanbul (İBB) Open Data

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

APICity, Nantes Open DataNEW—Istanbul (İBB) Open DataNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified (varies per dataset)
Free tierFree tier — key may be requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

City, Nantes Open Data vs Istanbul (İBB) Open Data: common questions

Which is more reliable, City, Nantes Open Data or Istanbul (İBB) Open Data?

On our scheduled checks, Istanbul (İBB) Open Data leads on measured uptime — City, Nantes Open Data at —% versus Istanbul (İBB) 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 City, Nantes Open Data and Istanbul (İBB) Open Data need an API key?

Istanbul (İBB) 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 Istanbul (İBB) Open Data first.

Can I call City, Nantes Open Data and Istanbul (İBB) Open Data from the browser?

Only City, Nantes Open Data is browser-friendly — it returns CORS headers over HTTPS. Istanbul (İBB) Open Data needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are City, Nantes Open Data and Istanbul (İBB) Open Data free for commercial use?

City, Nantes Open Data has unclear commercial terms, and Istanbul (İBB) 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.