The fairest casino on earth.
Provably.

Every card and spin is a cryptographic commit-reveal that you co-generate. Every payout is enforced by smart contracts on Arbitrum. We couldn't cheat you if we tried — and you can verify that yourself.

House Float (on-chain)
Channel Escrow
~300 ms
Settlement Speed
1.25%
Fee on losses only

🎰 Trending Games

All games settle on RAIN Risk Markets — instant, provably fair.

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Blackjack BJ 3:2
Blackjack
provably fair
Roulette 36×
Roulette
provably fair
Coin Flip 1.96×
Coin Flip
provably fair
Dice Custom
Dice
provably fair
Wheel 36×
Wheel
provably fair
Slots 36×
Slots
provably fair
Crash cash out
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provably fair
Plinko 36×
Plinko
provably fair

Your Recent Activity

GameMultiplierProfit
Your game history lives inside each game page.
Head to Blackjack, Roulette, Coin Flip or Dice and every result you generate is permanently recorded — no fake activity, no invented winners.

New to MAY? Claim your free RUSD.

Every wallet gets demo tokens from the faucet — no deposit needed. Play with house money and see how provably fair really works.

Why MAY is the fairest casino in the world

Not "trust us" fair. Mathematically, verifiably, on-chain fair.

🎲

You co-generate every outcome

Each card and spin is a mutual commit-reveal. Your browser and the house both commit hash-chains before play. Neither side can predict or bias a single result — not even us.

⚖️

Payouts enforced by contracts

Every game state is dual-signed and enforceable on Arbitrum One. If we tried to stiff you, the on-chain rules verifier proves the cheat and the chain pays you anyway.

Instant settlement

State channels give you ~300 ms results with zero gas per hand or spin. One transaction opens a session, one closes it — everything in between is instant and free.

🔐

Self-custody, always

Your funds sit in an escrow contract, never with us. If the house stalls, forceClose guarantees your exit — and you're compensated from the house bond.

Verify it yourself

Paste any revealed hash chain into our live verifier and recompute every card and number client-side. No API, no trust — just math in your browser.

Honest contrast: "provably fair" elsewhere usually isn't

Typical crypto casinos use a server seed they generate and hold. You get a hash up front and must trust their server to reveal honestly, keep custody of your deposit, and actually pay withdrawals. At MAY there is no server seed to trust: outcomes need your reveal, funds stay in your escrow, and payouts are enforced by the chain — even against us.