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Data.gov vs Data.parliament.uk

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

APIData.govNEW—Data.parliament.ukNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedOpen Parliament Licence
Free tierFree — limits not publishedFree / open data
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Data.gov vs Data.parliament.uk: common questions

Which is more reliable, Data.gov or Data.parliament.uk?

On our scheduled checks, Data.parliament.uk leads on measured uptime — Data.gov at —% versus Data.parliament.uk 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 Data.gov and Data.parliament.uk need an API key?

Neither needs a paid key — Data.gov is callable with no signup, and Data.parliament.uk is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Data.gov and Data.parliament.uk from the browser?

Only Data.parliament.uk 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 Data.gov and Data.parliament.uk free for commercial use?

Data.gov has unclear commercial terms, and Data.parliament.uk 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.