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TCGApi vs TETR.IO

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

APITCGApiNEW—TETR.IONEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key may be required for productionFree, no API key
Rate limitUnpublishedHonor server-provided cache expiry (~60s); docs require caching
In directory since2026-07-052026-07-05
operationalpartialdownno data

TCGApi vs TETR.IO: common questions

Which is more reliable, TCGApi or TETR.IO?

On our scheduled checks, TETR.IO leads on measured uptime — TCGApi 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 TCGApi and TETR.IO need an API key?

TETR.IO needs no key, while TCGApi requires a free API key. If you want to start calling without signup, reach for TETR.IO first.

Can I call TCGApi and TETR.IO from the browser?

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

TCGApi 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.