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City, Toronto Open Data vs EPA

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

APICity, Toronto Open DataNEW—EPANEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — no key required (CKAN)Free — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

City, Toronto Open Data vs EPA: common questions

Which is more reliable, City, Toronto Open Data or EPA?

On our scheduled checks, EPA leads on measured uptime — City, Toronto Open Data at —% versus EPA 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, Toronto Open Data and EPA need an API key?

Neither needs a paid key — City, Toronto Open Data is callable with no signup, and EPA is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call City, Toronto Open Data and EPA from the browser?

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

Are City, Toronto Open Data and EPA free for commercial use?

City, Toronto Open Data has unclear commercial terms, and EPA 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.