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Free Dictionary API vs Mediastack

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

APIFree Dictionary APINEW—MediastackNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Free Dictionary API vs Mediastack: common questions

Which is more reliable, Free Dictionary API or Mediastack?

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

Free Dictionary API needs no key, while Mediastack requires a free API key. If you want to start calling without signup, reach for Free Dictionary API first.

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

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

Are Free Dictionary API and Mediastack free for commercial use?

Free Dictionary API has unclear commercial terms, and Mediastack 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.