Open Library vs Florida Man

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

Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms
P95 · ms
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseMixed — mostly openMIT (repository license)
Free tierUnlimited within courtesy limitsFree — static JSON on GitHub Pages, no key
Rate limitSoft — identified UA appreciatedUnpublished (served via GitHub Pages)
In directory since2026-05-022026-07-05
operationalpartialdownno data

Open Library vs Florida Man: common questions

Which is more reliable, Open Library or Florida Man?

On our scheduled checks, Florida Man leads on measured uptime — Open Library at —% versus Florida Man 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 Open Library and Florida Man need an API key?

Neither needs a paid key — Open Library is callable with no signup, and Florida Man is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Open Library and Florida Man from the browser?

Yes — both Open Library and Florida Man 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 Open Library and Florida Man free for commercial use?

Open Library has unclear commercial terms, and Florida Man allows commercial use on its free tier. 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.