{"name":"health-metrics-api","version":"1.0.0","description":"Deterministic body-composition & fitness math: BMR, TDEE, BMI, body fat, macros, ideal weight, heart-rate zones, calorie goals, water, 1-RM. Metric or imperial. Peer-reviewed equations, no DB, byte-reproducible.","units":"Every endpoint accepts metric (weight_kg, height_cm) or imperial (weight_lb, height_ft+height_in). sex = male|female.","endpoints":{"POST /bmr":"Basal Metabolic Rate (Mifflin-St Jeor, Harris-Benedict, Katch-McArdle)","POST /tdee":"Total Daily Energy Expenditure + goal calorie targets","POST /bmi":"BMI + WHO category + healthy weight range","POST /body-fat":"US-Navy circumference + Deurenberg body-fat estimate","POST /macros":"Protein/carb/fat grams for calories + diet","POST /ideal-weight":"Devine/Robinson/Miller/Hamwi ideal weight","POST /heart-rate":"Max HR + Karvonen training zones","POST /calorie-goal":"Daily deficit/surplus for a target rate","POST /water":"Daily water intake (weight + exercise)","POST /one-rep-max":"1-RM (Epley/Brzycki/Lombardi) + %-table"},"example":"POST /tdee {\"weight_kg\":75,\"height_cm\":180,\"age\":30,\"sex\":\"male\",\"activity\":\"moderate\"}"}