Compound Interest Calculator

Repository to test MCP server functionality

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Overview

The Compound Interest Calculator is a web-based tool designed to help users understand the growth of their investments over time by calculating compound interest with options for monthly contributions.

Enter your initial investment amount in the "Initial Principal" field.
Input your planned monthly contribution.
Set your expected annual interest rate (as a percentage).
Click "Calculate Returns" to view your investment growth projection.

Calculates compound interest including monthly investments. - Provides a 30-year investment projection. - Offers detailed year-by-year breakdowns of investment growth showing principal, interest earned, and total balance. - User-friendly interface with responsive design. - Real-time calculations displayed in a clear format.

Estimating future investment growth for retirement planning.
Understanding the impact of monthly contributions on compound interest.
Comparing different investment strategies using varying rates and contributions.

Add to your AI client

Use these steps to connect Compound Interest Calculator in Cursor, Claude, VS Code, and other MCP-compatible apps. The same JSON appears in the Use with menu above for one-click copy.

Cursor

Add this to your .cursor/mcp.json file in your project root, then restart Cursor.

.cursor/mcp.json

{
  "mcpServers": {
    "test-jamespptsr": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-test-jamespptsr"
      ]
    }
  }
}

Claude Desktop

Add this server entry to the mcpServers object in your Claude Desktop config, then restart the app.

~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows)

{
  "mcpServers": {
    "test-jamespptsr": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-test-jamespptsr"
      ]
    }
  }
}

Claude Code

Add this to your project's .mcp.json file. Claude Code will detect it automatically.

.mcp.json (project root)

{
  "mcpServers": {
    "test-jamespptsr": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-test-jamespptsr"
      ]
    }
  }
}

VS Code (Copilot)

Add this to your .vscode/mcp.json file. Requires the GitHub Copilot extension with MCP support enabled.

.vscode/mcp.json

{
  "servers": {
    "test-jamespptsr": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-test-jamespptsr"
      ]
    }
  }
}

Windsurf

Add this to your Windsurf MCP config file, then restart Windsurf.

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "test-jamespptsr": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-test-jamespptsr"
      ]
    }
  }
}

Cline

Open Cline settings, navigate to MCP Servers, and add this server configuration.

Cline MCP Settings (via UI)

{
  "mcpServers": {
    "test-jamespptsr": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-test-jamespptsr"
      ]
    }
  }
}

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