Developer Playground

Every result is cryptographically verifiable. Pick a demo.

Sic Bo

3-dice Asian casino classic

VDF Entropy HMAC Derivation On-chain Anchor
Play →
7 7 7

Slots

5-reel slot machine

Weighted Symbols Multi-row Wins Deterministic Grid
Play →

Gacha

Loot box / treasure pull

Weighted Drop Rates Rarity Tiers Drop Rate Verification
Play →

How It Works

1
Each game calls api.fairseal.io to get a VDF-backed random result
2
The result includes a game_id and full cryptographic proof
3
Click "Verify" to see the complete proof chain on verify.fairseal.io
4
Every step is independently reproducible — no trust required
npm install @fairseal/commit

Integrate provably fair randomness into your own games