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City, Gdańsk vs FastDOL

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

APICity, GdańskNEW—FastDOLNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
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

City, Gdańsk vs FastDOL: common questions

Which is more reliable, City, Gdańsk or FastDOL?

On our scheduled checks, FastDOL leads on measured uptime — City, Gdańsk at —% versus FastDOL 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, Gdańsk and FastDOL need an API key?

City, Gdańsk needs no key, while FastDOL requires a free API key. If you want to start calling without signup, reach for City, Gdańsk first.

Can I call City, Gdańsk and FastDOL from the browser?

Only City, Gdańsk is browser-friendly — it returns CORS headers over HTTPS. FastDOL needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are City, Gdańsk and FastDOL free for commercial use?

City, Gdańsk has unclear commercial terms, and FastDOL 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.