---
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/world-economy/use-cases/research-gdp-by-country/claude
---
# How to Research GDP by Country with Claude

Claude transforms GDP data into rigorous comparative analysis. It retrieves figures for multiple countries, calculates compound annual growth rates, adjusts for population differences, and asks follow-up questions about your analytical framework to deliver insights comparing economies through whichever lens matters most for your research.

## Setup

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

## Steps

1. Connect ToolRouter: claude mcp add toolrouter -- npx -y toolrouter-mcp
2. Ask Claude: "Get GDP data for the United States over the last 10 years using world-economy"
3. Claude retrieves the GDP time series from authoritative sources
4. Ask: "Compare US GDP with China and the EU"
5. Analyze growth rates and relative economic size

## Example Prompt

```
Compare GDP for the US, China, Japan, Germany, and India over the last 10 years. Which economy has grown the fastest? Show the data in a table.
```

## Tips

- Claude can calculate GDP growth rates and compound annual growth from the data
- Ask for GDP per capita comparisons to account for population differences
- Compare nominal vs purchasing power parity (PPP) GDP for different insights
