Games & Comics — entry 071 of 77
TETR.IO
TETR.IO's "Tetra Channel" API, documented right on the game's own about page, exposes read-only JSON endpoints under ch.tetr.io for player stats, records, leaderboards, and server-wide totals like games played and pieces placed. No key or account is required, but a live Origin-header probe against ch.tetr.io always reflects a fixed Access-Control-Allow-Origin: https://tetr.io regardless of the requesting origin, so browser code on any other site can't read the response directly even though server-side fetches work fine.
AuthenticationNone requiredCall it straight away — no key, no signup.
HTTPSSupportedTraffic is encrypted in transit.
CORSDisabledBrowser calls need a server-side proxy.
PricingFreeNo paid tier — free for the documented use case.
FormatsJSONResponses can be requested as JSON.
GreatAPIs Score
Score74
Authentication25/25No authentication required
Pricing20/20Free to use
Docs0/20No docs or spec available
Formats9/15Single response format
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/tetr-io/"><img src="https://greatapis.com/badge/tetr-io.svg" alt="Scored 74 on greatapis.com"></a>Auth quickstart
- No key needed — call it now.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.