# MCP Calculator Demo

> Use this tool when you need to perform basic arithmetic operations, such as addition, subtraction, multiplication, and division, and integrate them into MCP client workflows like GitHub Copilot Agent mode. It solves problems requiring simple calculations and provides inputs for numerical values and outputs calculated results. Ideal for use cases where automated mathematical computations are necessary, such as data processing or algorithmic tasks.

Canonical page: https://skillsregistry.net/skills/istabraqruhaili-mcp-app  
JSON: https://api.skillsregistry.net/v1/skills/istabraqruhaili-mcp-app

## Description

A simple demonstration MCP server built with FastMCP that exposes basic calculator operations (add, subtract, multiply, divide) as tools for MCP clients like GitHub Copilot Agent mode.

## Trust

- **Trust score (0–1):** 0.98
- **Verification tier:** verified
- **Last scanned:** 2026-09-28

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** version-control
- **Updated:** 2026-09-28

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/wjf264e9ry)
- **Repository:** <https://github.com/istabraqruhaili/mcp-app>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "istabraqruhaili-mcp-app"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/istabraqruhaili-mcp-app` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/istabraqruhaili-mcp-app/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt