Johnserf-Seed

Fetch and analyze China Sports Lottery 竞彩足球 (Jingcai football) odds. Use when the user wants the latest 竞彩 odds, to derive implied / no-vig probabilities or 返还率 (return rate), to assess value / 凯利指数 (Kelly) against a reference set, or to compute 单关 / 过关 (parlay) payouts. Backed by the Sporttery Odds service in this repo (MCP tools + REST + pure modules).