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Data.parliament.uk API vs GLEIF LEI API

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

APIData.parliament.uk APINEW—GLEIF LEI APINEW—
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 GLEIF LEI API: common questions

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

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

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

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

Yes — both Data.parliament.uk API and GLEIF LEI API 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 GLEIF LEI API free for commercial use?

Data.parliament.uk API has unclear commercial terms, and GLEIF LEI API 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.