How do I use Calculator MCP Server?

1. Click on "Install Server". 2. Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state. 3. In the chat, type @ followed by the MCP server name and your instructions, e.g., "@Calculator MCP Server what's 15% of 80 plus 25?" That's it! The server will respond to your query, and you can continue using it as needed. Here is a step-by-step guide with screenshots.

Calculator MCP Server

A Model Context Protocol (MCP) server that provides calculator tools for mathematical operations.

Features

The calculator server provides the following tools:

add: Add two or more numbers together
subtract: Subtract numbers (subtracts all subsequent numbers from the first)
multiply: Multiply two or more numbers together
divide: Divide numbers (divides first number by all subsequent numbers)
power: Raise a number to a power
sqrt: Calculate the square root of a number
evaluate: Evaluate a mathematical expression safely (supports basic math operations and functions)

Installation

Install the required dependencies:

pip install -r requirements.txt

Or install directly:

pip install mcp

Usage

Run the server:

python calculator_server.py

The server communicates via stdio and follows the MCP protocol.

Configuration

To use this server with an MCP client, add the following to your MCP client configuration:

{ "mcpServers": { "calculator": { "command": "python", "args": ["/path/to/calculator_server.py"], "transport": "stdio" } } }

Or if you're in the same directory:

{ "mcpServers": { "calculator": { "command": "python", "args": ["calculator_server.py"], "transport": "stdio" } } }

Example Tools

Add

{ "name": "add", "arguments": { "numbers": [1, 2, 3, 4] } }

Result: 10

Subtract

{ "name": "subtract", "arguments": { "numbers": [100, 20, 5] } }

Result: 75

Multiply

{ "name": "multiply", "arguments": { "numbers": [2, 3, 4] } }

Result: 24

Divide

{ "name": "divide", "arguments": { "numbers": [100, 5, 2] } }

Result: 10.0

Power

{ "name": "power", "arguments": { "base": 2, "exponent": 8 } }

Result: 256

Square Root

{ "name": "sqrt", "arguments": { "number": 16 } }

Result: 4.0

Evaluate Expression

{ "name": "evaluate", "arguments": { "expression": "2 + 2 * 3" } }

Result: 8

The evaluate tool also supports mathematical functions like sin, cos, tan, sqrt, log, exp, pi, e, etc.

Safety

The evaluate tool uses Python's compile() and eval() functions with a restricted namespace for safety. Only basic mathematical operations and functions are allowed.