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Attack on Titan API vs Demon Slayer API

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

APIAttack on Titan APINEW—Demon Slayer APINEW—
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

Attack on Titan API vs Demon Slayer API: common questions

Which is more reliable, Attack on Titan API or Demon Slayer API?

On our scheduled checks, Demon Slayer API leads on measured uptime — Attack on Titan API at —% versus Demon Slayer 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 Attack on Titan API and Demon Slayer API need an API key?

Neither needs a paid key — Attack on Titan API is callable with no signup, and Demon Slayer API is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Attack on Titan API and Demon Slayer API from the browser?

Yes — both Attack on Titan API and Demon Slayer 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 Attack on Titan API and Demon Slayer API free for commercial use?

Attack on Titan API has unclear commercial terms, and Demon Slayer 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.