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Archive.org vs Free Dictionary API

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

APIArchive.orgNEW—Free Dictionary APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (rights vary per item)Unverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Archive.org vs Free Dictionary API: common questions

Which is more reliable, Archive.org or Free Dictionary API?

On our scheduled checks, Free Dictionary API leads on measured uptime — Archive.org at —% versus Free Dictionary 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 Archive.org and Free Dictionary API need an API key?

Neither needs a paid key — Archive.org is callable with no signup, and Free Dictionary API is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Archive.org and Free Dictionary API from the browser?

Yes — both Archive.org and Free Dictionary 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 Archive.org and Free Dictionary API free for commercial use?

Archive.org has unclear commercial terms, and Free Dictionary 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.