{
  "endpoint": "/api/tdee-estimator",
  "method": "GET",
  "description": "Calculates the Total Daily Energy Expenditure (TDEE) based on BMR and physical activity factor.",
  "parameters": {
    "bmr": { "type": "number", "required": true },
    "activityLevel": { "type": "string", "enum": ["sedentary", "light", "moderate", "active", "extreme"], "required": true }
  },
  "activity_multipliers": {
    "sedentary": 1.2,
    "light": 1.375,
    "moderate": 1.55,
    "active": 1.725,
    "extreme": 1.9
  },
  "sample_response": {
    "tdee": 2387,
    "comparisons": {
      "sedentary": 1848,
      "light": 2118,
      "moderate": 2387,
      "active": 2657
    }
  }
}