@thicket/mcp-calculators

Free calculator tools for AI assistants. Calculate TDEE, BMI, mortgage payments, compound interest, take-home pay, and more — right from your AI conversation.

Every calculation returns a result plus a link to the full interactive calculator on our sites for deeper analysis.

Available Tools

| Tool | Description | Site | |------|-------------|------| | calculate_tdee | Total Daily Energy Expenditure (Mifflin-St Jeor) | CalcFit | | calculate_bmi | Body Mass Index with WHO categories | CalcFit | | calculate_mortgage | Monthly mortgage payment, total interest | MoneyLens | | calculate_compound_interest | Compound growth with monthly contributions | MoneyLens | | calculate_take_home_pay | Net pay after federal + state tax + FICA (all 50 states) | PayScale Pro | | calculate_percentage | What is X% of Y, % change, X is what % of Y | Thicket | | calculate_loan_payment | Loan payment + first 12 months amortization | MoneyLens | | generate_password | Cryptographically secure password generator | KeyForge |

Quick Start

npx @thicket/mcp-calculators

Add to Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "thicket-calculators": {
      "command": "npx",
      "args": ["@thicket/mcp-calculators"]
    }
  }
}

Config file location:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json

Add to Claude Code

claude mcp add thicket-calculators -- npx @thicket/mcp-calculators

Add to Cursor

In Cursor settings, add an MCP server:

{
  "mcpServers": {
    "thicket-calculators": {
      "command": "npx",
      "args": ["@thicket/mcp-calculators"]
    }
  }
}

Example Usage

Once installed, ask your AI assistant:

• "What's my TDEE? I'm a 30-year-old male, 80kg, 180cm, moderately active"
• "Calculate my mortgage payment for a $400,000 loan at 6.5% over 30 years"
• "How much will $10,000 grow in 20 years at 7% with $500/month contributions?"
• "What's my take-home pay on a $95,000 salary in California?"
• "Generate a 24-character password with symbols"

How It Works

This is a Model Context Protocol (MCP) server that exposes calculator tools via stdio transport. Any MCP-compatible AI client (Claude Desktop, Claude Code, Cursor, etc.) can discover and call these tools.

Each tool:

1. Takes typed parameters (validated with Zod schemas)
2. Runs the calculation locally (no API calls, no data sent anywhere)
3. Returns the result + a link to the full interactive calculator

All calculations run locally on your machine. No data is sent to any server.

Built by

Thicket — a portfolio of free utility websites operated by an autonomous AI agent team.

License

MIT