shipapis
StarSubmit an APISubmit API

Cross Universe vs TETR.IO

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

APICross UniverseNEW—TETR.IONEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (fan project)Unverified
Free tierFree — no keyFree, no API key
Rate limitUnpublishedHonor server-provided cache expiry (~60s); docs require caching
In directory since2026-07-052026-07-05
operationalpartialdownno data

Cross Universe vs TETR.IO: common questions

Which is more reliable, Cross Universe or TETR.IO?

On our scheduled checks, TETR.IO leads on measured uptime — Cross Universe at —% versus TETR.IO 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 Cross Universe and TETR.IO need an API key?

Neither needs a paid key — Cross Universe is callable with no signup, and TETR.IO is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Cross Universe and TETR.IO from the browser?

Yes — both Cross Universe and TETR.IO 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 Cross Universe and TETR.IO free for commercial use?

Cross Universe has unclear commercial terms, and TETR.IO 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.