#house-edge

Casino game maths as an API, computed locally and deterministically — exact house edge, expected value and return-to-player, never a simulation. The roulette endpoint takes a wheel variant (European single-zero or American double-zero) and a bet type (straight, split, street, corner, six-line, column, dozen, red/black, odd/even, high/low, or the American basket) and returns the win probability, the payout, the expected value per unit staked and the house edge — the famous 2.70 % on every European bet, 5.26 % on American (7.89 % on the basket), and 1.35 % when the European la-partage rule is applied to even-money bets. The craps endpoint gives the exact 36-outcome dice maths for the pass line (1.41 %), don't pass (1.36 %, with its 12-push), the field (2.78 % when 12 pays 3:1) and any seven (16.67 %). The bet endpoint is fully generic: give any win probability and payout and it returns the expected value, house edge, return-to-player and the standard deviation of a unit bet — perfect for keno, slots, scratch cards or a custom wager. Everything is computed locally and deterministically, so it is instant and private. Ideal for gaming-analytics, responsible-gambling, casino-education and odds-comparison app developers, advantage-play and bankroll tools, and probability teaching. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. This is the game-odds maths; for Texas Hold'em hand equity use a poker API and for converting betting prices use an odds API.

api.oanor.com/casino-api