x4021.987659876.xyz is a single-endpoint on-chain lottery API deployed on Base that charges 0.10 USDC per play (/lottery). Each play has a 5% chance to win 1 USDC — the expected payout per play is 0.05 USDC, so the game has a negative expected value of about -0.05 USDC. This provider is best suited for lightweight gamification, promotions, and experiments; verify contract custody and randomness guarantees before production use.