# githejie/mcp-server-calculator [Health: Active]

**Category:** 🛠️ Other Tools and Integrations  
**Repository:** https://github.com/githejie/mcp-server-calculator  
**GitHub Stars:** 160  
**Views:** 4  
**Installs:** 0  
**Upvotes:** 0  
**Directory Page:** https://allmcps.com/mcp/githejie-mcp-server-calculator

## Description
This server enables LLMs to use calculator for precise numerical calculations

## Tools
Capabilities this server exposes over MCP:

- **calculate** — Calculates/evaluates the given expression.

## Claude Desktop Quick Installation
Install path detected from listing signals. Uses `uvx` (confidence: high):

```json
"mcpServers": {
  "mcp-server-calculator": {
    "command": "uvx",
    "args": ["mcp-server-calculator"]
  }
}
```

## Documentation

## What githejie/mcp-server-calculator MCP server does

githejie/mcp-server-calculator MCP server gives an MCP-compatible client access to a calculator for evaluating numerical expressions. It is intended for cases where an LLM needs a calculation performed explicitly and returned as a tool result.

The server exposes one documented capability: `calculate`. Its required input is `expression`, represented as a string. The project documentation does not describe additional tools, data sources, external integrations, authentication, or persistent state.

## How it works

The server is started as a local process that an MCP client can invoke. The client sends an expression to the `calculate` tool, and the server evaluates it. This keeps the calculation step separate from the model’s conversational response and gives the model a tool for numerical work.

There are two documented ways to launch it:

- Use `uvx` to run the package without a separate package installation.
- Install the package with pip and start it with Python’s module runner.

The repository does not document a network endpoint, API key, configuration file beyond the MCP client entry, or environment variables.

## Setup and configuration

For the recommended `uv` approach, install `uv` with the project’s provided installation command, then register a server entry that runs `uvx` with `mcp-server-calculator` as its argument. The corresponding client configuration uses `command: "uvx"` and passes the package name through `args`.

With pip, install the package named `mcp-server-calculator`. Configure the MCP client to run `python` with `-m mcp_server_calculator`. These two launch methods are the only setup paths documented by the project.

No environment variables are required by the documented configuration.

## Tools and capabilities

The documented tool is:

- `calculate`: evaluates the supplied expression.

Its input is one required field:

- `expression` — a string containing the expression to calculate.

The package is a focused choice for numerical expression evaluation. It does not document tools for files, databases, web requests, code execution, or unit conversion, so those use cases are outside the stated scope.

## Limitations and notes

githejie/mcp-server-calculator MCP server has a narrow interface: one tool and one required input. Validate expressions and result handling in the target client if those details matter to your workflow.

The documented client configuration launches the server locally, so deployment details beyond local process startup are not covered. The project is licensed under MIT, allowing use, modification, and distribution subject to that license’s terms.

_Full upstream README: https://allmcps.com/mcp/githejie-mcp-server-calculator/readme_