Macro Calculator

Calculators REST API MCP

Calculate daily calorie needs and a macronutrient split (protein, carbs, fat in grams and kcal) for weight loss, maintenance, or muscle gain. Uses Mifflin-St Jeor BMR, an activity multiplier, a +/-500 kcal goal adjustment, and goal-specific ratios.

This page documents the HTTP endpoint POST /api/tools/macro-calculator/execute. See the MCP reference →

Use in the browser View as Markdown

Call it over REST

POST https://api.findutils.com/api/tools/macro-calculator/execute · no API keys · 60 requests/min per IP

Execute — verified arguments

curl -X POST https://api.findutils.com/api/tools/macro-calculator/execute \
  -H "Content-Type: application/json" \
  -d '{
    "gender": "male",
    "age": 30,
    "weight": 70,
    "height": 175
  }'

Parameter schema for this endpoint

curl https://api.findutils.com/api/tools/macro-calculator

Interactive docs · OpenAPI 3.1 spec · All REST tools

Input schema

Argument	Type	Required	Description
gender	string (male \| female)	yes	Biological sex used by the BMR equation.
age	integer	yes	Age in years (1-120).
weight	number	yes	Body weight in kg (metric) or lbs (imperial).
height	number	yes	Height in cm (metric) or inches (imperial).
unit_system	string (metric \| imperial)	no	Unit system for weight and height. Default: "metric".
activity_level	string (sedentary \| light \| moderate \| active \| very_active)	no	Activity level: sedentary 1.2, light 1.375, moderate 1.55, active 1.725, very_active 1.9. Default: "moderate".
goal	string (lose \| maintain \| gain)	no	lose = -500 kcal with 35/35/30 split, maintain = 30/40/30, gain = +500 kcal with 25/50/25 (protein/carbs/fat). Default: "maintain".

Example arguments (verified)

{
  "gender": "male",
  "age": 30,
  "weight": 70,
  "height": 175
}

Also an MCP tool

Claude, Cursor, and any MCP client can call this tool as findutils:macro_calculator after one connect command.

Connect once

claude mcp add findutils --transport http https://mcp.findutils.com/

Open the MCP reference for Macro Calculator →

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