Calculator MCP Server

by slettmayer Your server? Claim it

local only

Calculator runs on your own machine — the client starts it, so there is no endpoint to ping. 257 installs a week from pypi. Last commit 18 Sep 2026.

Exact arithmetic: one calculator tool over an AST allowlist, with integers exact at any size.

Installs per day peak 665 · avg 100 · -61% w/w

a month agotoday

257

Installs / week

pypi · calc-mcp-server

Stars

0 open issues

18 Sep 2026

Last commit

0 releases in 90 days

MIT

License

Python

What the code does

We read the source, 20 h ago · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

File ships in the package but is absent from the source [пакет] src/calc_mcp_server/_version.py:1

этот файл ставится пользователю, но в репозитории его нет

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add calc-mcp-server -- uvx calc-mcp-server

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "calc-mcp-server": {
      "args": [
        "calc-mcp-server"
      ],
      "command": "uvx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.calc-mcp-server]
command = "uvx"
args = ["calc-mcp-server"]

.cursor/mcp.json

{
  "mcpServers": {
    "calc-mcp-server": {
      "args": [
        "calc-mcp-server"
      ],
      "command": "uvx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "calc-mcp-server": {
      "args": [
        "calc-mcp-server"
      ],
      "command": "uvx"
    }
  }
}

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Calculator — questions

Answers built from our own checks of this server.

Why is there no uptime for Calculator?

Calculator runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the pypi package calc-mcp-server was installed 257 times last week.

How do I connect Calculator?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls calc-mcp-server straight from pypi; nothing to host, nothing to sign up for.

How many people use Calculator?

The pypi package calc-mcp-server was installed 257 times in the last week. Week over week that is -61%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Calculator open source?

Yes — it is published under the MIT licence, written in Python and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.