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Kanji API vs MyMemory

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

APIKanji APINEW—MyMemoryNEW—
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 limitUnpublishedRetry-After: 20637s
In directory since2026-07-052026-07-05
operationalpartialdownno data

Kanji API vs MyMemory: common questions

Which is more reliable, Kanji API or MyMemory?

On our scheduled checks, MyMemory leads on measured uptime — Kanji API at —% versus MyMemory 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 Kanji API and MyMemory need an API key?

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

Can I call Kanji API and MyMemory from the browser?

Yes — both Kanji API and MyMemory 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 Kanji API and MyMemory free for commercial use?

Kanji API has unclear commercial terms, and MyMemory 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.