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Data.parliament.uk vs USAspending.gov

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

APIData.parliament.ukNEW—USAspending.govNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useyesyes
Data licenseOpen Parliament LicenceU.S. Government Work (public domain)
Free tierFree / open dataFree — no key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

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

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

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

Neither needs a paid key — Data.parliament.uk 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 Data.parliament.uk and USAspending.gov from the browser?

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

Are Data.parliament.uk and USAspending.gov free for commercial use?

Data.parliament.uk allows commercial use on its free tier, 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.