---
title: ToolRouter — Agent Use Case Guide
description: Step-by-step guide for completing a task with a specific AI agent using ToolRouter.
url: https://toolrouter.com/tools/nutrition-data/use-cases/build-nutrition-labels/claude
---
# How to Build Nutrition Labels with Claude

Claude builds nutrition labels through an iterative recipe conversation. List your ingredients and quantities, let Claude look up each one, then refine serving sizes and adjust for cooking losses through follow-up questions. The result is a complete nutrition facts panel you can tweak by swapping ingredients and immediately seeing how the label changes.

## Setup

claude mcp add toolrouter -- npx -y toolrouter-mcp

## Steps

1. Connect ToolRouter: claude mcp add toolrouter -- npx -y toolrouter-mcp
2. Ask Claude: "Look up nutrition for each ingredient in this recipe and create a nutrition label: 400g chicken, 200g rice, 100g peppers, 30ml olive oil"
3. Claude looks up each ingredient and aggregates the totals
4. Ask: "Format this as a standard nutrition facts panel for 4 servings"
5. Use the generated label for your product or recipe

## Example Prompt

```
I need a nutrition label for my granola recipe: 200g oats, 50g honey, 30g coconut oil, 50g almonds, 30g dried cranberries. This makes 10 servings. Calculate per-serving nutrition facts.
```

## Tips

- Always specify the number of servings to get accurate per-serving values
- Ask Claude to format the output matching FDA nutrition label standards
- Include all ingredients, even small amounts of oil or seasoning -- they add up
