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City, Nantes Open Data vs Data.gov

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

APICity, Nantes Open DataHEALTHY83Data.govHEALTHY79
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms1073931
P95 · ms29662035
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

City, Nantes Open Data vs Data.gov: common questions

Which is more reliable, City, Nantes Open Data or Data.gov?

Both are neck-and-neck — City, Nantes Open Data and Data.gov each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, City, Nantes Open Data or Data.gov?

Data.gov has the lower median latency in our checks — City, Nantes Open Data responds in 1073 ms versus Data.gov at 931 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do City, Nantes Open Data and Data.gov need an API key?

Data.gov needs no key, while City, Nantes Open Data requires a free API key. If you want to start calling without signup, reach for Data.gov first.

Can I call City, Nantes Open Data and Data.gov from the browser?

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

Are City, Nantes Open Data and Data.gov free for commercial use?

City, Nantes Open Data has unclear commercial terms, and Data.gov 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.