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Gutendex vs Quran Cloud

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

APIGutendexNEW—Quran CloudNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licensePublic domain (Project Gutenberg data)Unverified
Free tierFree, no keyFree — limits not published
Rate limitUnpublished12 req/window · 11 remaining · resets 1
In directory since2026-07-052026-07-05
operationalpartialdownno data

Gutendex vs Quran Cloud: common questions

Which is more reliable, Gutendex or Quran Cloud?

On our scheduled checks, Quran Cloud leads on measured uptime — Gutendex at —% versus Quran Cloud 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 Gutendex and Quran Cloud need an API key?

Neither needs a paid key — Gutendex is callable with no signup, and Quran Cloud is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Gutendex and Quran Cloud from the browser?

Yes — both Gutendex and Quran Cloud 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 Gutendex and Quran Cloud free for commercial use?

Gutendex has unclear commercial terms, and Quran Cloud 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.