Calculator MCP Server

@githejie

Basic information

About Calculator MCP Server

A Model Context Protocol server for calculating.

Calculator MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "mcp-server-calculator": {
      "command": "python",
      "args": [
        "-m",
        "mcp_server_calculator"
      ]
    }
  }
}

Calculator MCP Server tools

Calculates/evaluates the given expression.

Overview

What is Calculator MCP Server?

A Model Context Protocol server that enables LLMs to perform precise numerical calculations by evaluating mathematical expressions. It provides a single tool for calculating expressions.

How to use Calculator MCP Server?

Install it via uvx (recommended) or pip install mcp-server-calculator. Then add the following configuration to your MCP client settings: for uvx use "command": "uvx", "args": ["mcp-server-calculator"]; for pip use "command": "python", "args": ["-m", "mcp_server_calculator"].

Key features of Calculator MCP Server

Provides a single calculate tool for expression evaluation.
Accepts a required expression string parameter.
Designed for integration with any MCP‑compatible client.
No persistent storage or external dependencies beyond Python.
Licensed under the MIT License for free use and modification.

Use cases of Calculator MCP Server

An LLM performing arithmetic or algebraic calculations during a conversation.
Validating complex numerical expressions before presenting results.
Offloading exact computation to a dedicated tool to reduce errors.
Embedding precise mathematical capabilities into AI assistants.

Frequently asked questions

What tool does the Calculator MCP Server provide?

It exposes a single tool called `calculate` that takes an `expression` (string, required) and evaluates it.

How do I install the Calculator MCP Server?

You can install it using `uvx` (no separate install needed) or via `pip install mcp-server-calculator`. After pip installation, run `python -m mcp_server_calculator`.

How do I configure the Calculator MCP Server with my MCP client?

Add a JSON block to your client’s settings: for `uvx` use `"command": "uvx", "args": ["mcp-server-calculator"]`; for `pip` use `"command": "python", "args": ["-m", "mcp_server_calculator"]`.

Does the Calculator MCP Server require any specific runtime?

It requires Python and the MCP client. When using `uvx`, the `uv` tool handles the runtime automatically.

Is the Calculator MCP Server open source?

Yes, it is licensed under the MIT License, allowing free use, modification, and distribution.

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