Build a 0DTE Options Dashboard with One API Call

If you've tried building a 0DTE options dashboard from raw market data, you know the pain: intraday chain snapshots, Greeks recomputation every few minutes, pin risk models, gamma aggregation, and infrastructure that needs to run reliably during market hours. One endpoint replaces all of it: GET /v1/exposure/zero-dte/{symbol} . Pin risk scoring, expected move, gamma acceleration, dealer hedging scenarios, vol context, flow data, and per-strike breakdown. One JSON response. Why 0DTE Is a Different Engineering Problem Longer-dated options are stable. Greeks change slowly, hedging flows are predictable, and polling every 15-30 minutes is fine. 0DTE breaks every one of these assumptions. Property 7DTE 0DTE (Morning) 0DTE (Last Hour) ATM Gamma 1x (baseline) 2-3x 8-15x Theta Decay / Hour Slow, linear Moderate 4-5x morning rate Expected Move Stable Shrinks 30-40% by 2 PM Shrinks 70-80% by 3:30 PM Pin Risk Negligible Building Dominant Dealer Hedging per $1 Move Moderate Large Massive Everythin