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Free Dictionary API vs Mediastack

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

APIFree Dictionary APIHEALTHY90MediastackHEALTHY93
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms674449
P95 · ms21961356
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?

Both are neck-and-neck — Free Dictionary API and Mediastack each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Free Dictionary API or Mediastack?

Mediastack has the lower median latency in our checks — Free Dictionary API responds in 674 ms versus Mediastack at 449 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 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.