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Gutendex vs Holy Bible API

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

APIGutendexDYING25Holy Bible APIHEALTHY88
Uptime · 30d
Uptime · 90d8.8%100%
Uptime · 30d8.3%100%
P50 · ms3229852
P95 · ms46902274
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licensePublic domain (Project Gutenberg data)Unverified
Free tierFree, no keyFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Gutendex vs Holy Bible API: common questions

Which is more reliable, Gutendex or Holy Bible API?

On our scheduled checks, Holy Bible API leads on measured uptime — Gutendex at 8.8% versus Holy Bible API at 100% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Gutendex or Holy Bible API?

Holy Bible API has the lower median latency in our checks — Gutendex responds in 3229 ms versus Holy Bible API at 852 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Gutendex and Holy Bible API need an API key?

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

Can I call Gutendex and Holy Bible API from the browser?

Only Gutendex is browser-friendly — it returns CORS headers over HTTPS. Holy Bible API needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Gutendex and Holy Bible API free for commercial use?

Gutendex has unclear commercial terms, and Holy Bible 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.