{"ok":true,"endpoints":["GET /v1/calendar?date=YYYY-MM-DD  — Gregorian↔lunar, leap month, 建除/黃黑道/六曜/紫白","GET /v1/ganzhi?date=YYYY-MM-DD&hour=H   — four pillars under BOTH year/boundary conventions","GET /v1/solar-terms?year=YYYY   — 24 term instants with ΔT and midnight margins","GET /v1/kua?date=YYYY-MM-DD&hour=H&minute=M&gender=male|female[&convention=standard|gen]  — Ming Gua + eight directions","GET /v1/flying-star?yun=1-9&sitting=<index|山名>&kind=xiagua|tigua  — nine-palace chart + patterns","GET /v1/yun?date=YYYY-MM-DD   — current San Yuan period for a date","GET /v1/rulesets   — rule sets the kernel actually implements","POST /v1/replay  — recompute a snapshot and match input_digest","POST /v1/mcp   — MCP (JSON-RPC 2.0, stateless streamable HTTP) — AI agents start here"],"auth":"none (public free tier)","idempotent":true,"docs":"https://fengshuicalculator.com/docs/api/","spec":"02-数据架构与API规范 §4.2 Wave 1"}