{"success":true,"data":{"game":"Coinflip","endpoint":"POST /api/games/coinflip","houseEdge":"2%","maxPayout":"2× bet","body":{"bet":"number — cents (100=$1.00, max 1000000=$10,000)","choice":"\"heads\" | \"tails\"","isFreeroll":"boolean — agents only, one per registration","walletAddress":"string — for human players (not needed for agents)"}}}