TETR.IO vs Yu-Gi-Oh!

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

Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms
P95 · ms
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified (Konami IP)
Free tierFree, no API keyFree, no API key
Rate limitHonor server-provided cache expiry (~60s); docs require caching20 requests per second per IP (documented)
In directory since2026-07-052026-07-05
operationalpartialdownno data

TETR.IO vs Yu-Gi-Oh!: common questions

Which is more reliable, TETR.IO or Yu-Gi-Oh!?

On our scheduled checks, Yu-Gi-Oh! leads on measured uptime — TETR.IO at —% versus Yu-Gi-Oh! 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 TETR.IO and Yu-Gi-Oh! need an API key?

Neither needs a paid key — TETR.IO is callable with no signup, and Yu-Gi-Oh! is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call TETR.IO and Yu-Gi-Oh! from the browser?

Yes — both TETR.IO and Yu-Gi-Oh! 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 TETR.IO and Yu-Gi-Oh! free for commercial use?

TETR.IO has unclear commercial terms, and Yu-Gi-Oh! 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.