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Data.parliament.uk vs FastDOL

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

APIData.parliament.ukNEW—FastDOLNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licenseOpen Parliament LicenceUnverified
Free tierFree / open dataFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Data.parliament.uk vs FastDOL: common questions

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

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

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

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

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

Are Data.parliament.uk and FastDOL free for commercial use?

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