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Data.parliament.uk API vs Datasette

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

APIData.parliament.uk APINEW—DatasetteNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Data.parliament.uk API vs Datasette: common questions

Which is more reliable, Data.parliament.uk API or Datasette?

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

Datasette needs no key, while Data.parliament.uk API requires a free API key. If you want to start calling without signup, reach for Datasette first.

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

Yes — both Data.parliament.uk API and Datasette send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Data.parliament.uk API and Datasette free for commercial use?

Data.parliament.uk API has unclear commercial terms, and Datasette 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.