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Istanbul (İBB) Open Data vs USAspending.gov

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

APIIstanbul (İBB) Open DataNEW—USAspending.govNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverified (varies per dataset)U.S. Government Work (public domain)
Free tierFree — limits not publishedFree — no key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Istanbul (İBB) Open Data vs USAspending.gov: common questions

Which is more reliable, Istanbul (İBB) Open Data or USAspending.gov?

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

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

Can I call Istanbul (İBB) Open Data and USAspending.gov from the browser?

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

Are Istanbul (İBB) Open Data and USAspending.gov free for commercial use?

Istanbul (İBB) Open Data has unclear commercial terms, and USAspending.gov 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.