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Istanbul (İBB) Open Data vs Neotimo DGFiP Mirror

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

APIIstanbul (İBB) Open DataNEW—Neotimo DGFiP MirrorNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (varies per dataset)Unverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Istanbul (İBB) Open Data vs Neotimo DGFiP Mirror: common questions

Which is more reliable, Istanbul (İBB) Open Data or Neotimo DGFiP Mirror?

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

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

Can I call Istanbul (İBB) Open Data and Neotimo DGFiP Mirror from the browser?

Only Neotimo DGFiP Mirror 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 Istanbul (İBB) Open Data and Neotimo DGFiP Mirror free for commercial use?

Istanbul (İBB) Open Data has unclear commercial terms, and Neotimo DGFiP Mirror 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.