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City, Gdynia vs Istanbul (İBB) Open Data

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

APICity, GdyniaNEW—Istanbul (İBB) Open DataNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified (varies per dataset)
Free tierFree / open dataFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

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

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

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

Neither needs a paid key — City, Gdynia is callable with no signup, and Istanbul (İBB) Open Data is callable with no signup. Both are quick to prototype with; rate limits still apply.

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

Neither sends browser-friendly CORS headers reliably, so call City, Gdynia and Istanbul (İBB) Open Data from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

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

City, Gdynia 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.