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Free Dictionary API vs OpenSanctions

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

APIFree Dictionary APINEW—OpenSanctionsNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Free Dictionary API vs OpenSanctions: common questions

Which is more reliable, Free Dictionary API or OpenSanctions?

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

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

Can I call Free Dictionary API and OpenSanctions from the browser?

Yes — both Free Dictionary API and OpenSanctions 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 Free Dictionary API and OpenSanctions free for commercial use?

Free Dictionary API has unclear commercial terms, and OpenSanctions 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.