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GLEIF LEI API vs The Guardian

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

APIGLEIF LEI APINEW—The GuardianNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree developer key — registration required
Rate limitUnpublished5000 calls/day (developer tier)
In directory since2026-07-052026-07-05
operationalpartialdownno data

GLEIF LEI API vs The Guardian: common questions

Which is more reliable, GLEIF LEI API or The Guardian?

On our scheduled checks, The Guardian leads on measured uptime — GLEIF LEI API at —% versus The Guardian 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 GLEIF LEI API and The Guardian need an API key?

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

Can I call GLEIF LEI API and The Guardian from the browser?

Yes — both GLEIF LEI API and The Guardian 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 GLEIF LEI API and The Guardian free for commercial use?

GLEIF LEI API has unclear commercial terms, and The Guardian 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.