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Create a Custom Server MCP Server

@JustVarunsai

リポジトリ

基本情報

カテゴリ

その他

ライセンス

MIT

トランスポート

stdio

作者

JustVarunsai

Create a Custom Server MCP Server について

A custom MCP server that provides arithmetic calculation tools and fast mathematical operations for AI assistants.

#mathgpt#math-solver#math-assistant

Create a Custom Server MCP Server の設定

以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。

{
  "mcpServers": {
    "create-mcp-server-justvarunsai": {
      "command": "uv",
      "args": [
        "init",
        "calculator"
      ]
    }
  }
}

Create a Custom Server MCP Server のツール

ツール一覧はまだありません

この掲載には表示できるツール一覧がまだありません。サーバーにツールがないという意味ではありません。対応機能はプロジェクトのドキュメントをご確認ください。

ツールは README から自動的に抽出されます。メンテナーは ## Tools という見出しの下に記載することで、このタブに反映できます。

概要

What is Create a Custom Server?

A tutorial that guides developers on building a simple Model Context Protocol (MCP) server using Python and FastMCP, then connecting it to a desktop host like Claude for Desktop. It demonstrates creating four arithmetic tools—add, subtract, multiply, divide—to extend AI assistants with custom capabilities.

How to use Create a Custom Server?

Install uv, create a Python project, activate a virtual environment, add mcp[cli] dependency, write a calculator.py script using FastMCP and tool decorators, run with uv run calculator.py, then configure the server’s absolute path in Claude for Desktop’s claude_desktop_config.json under mcpServers.

Key features of Create a Custom Server

  • Step-by-step guide to building an MCP server from scratch.
  • Implements four arithmetic tools: add, subtract, multiply, divide.
  • Uses Python MCP SDK (FastMCP) and uv for environment management.
  • Connects to Claude for Desktop (desktop hosts only).
  • Requires Python 3.10+ and MCP SDK 1.2.0+.
  • Server runs locally via stdio transport.

Use cases of Create a Custom Server

  • Extending Claude with custom arithmetic calculations during conversations.
  • Learning the fundamentals of building and configuring MCP servers.
  • Developing custom tools for AI assistants in local desktop environments.
  • Creating a foundation for more complex MCP servers (weather, finance, etc.).

よくある質問

1

What is MCP?

MCP (Model Context Protocol) is a protocol that allows developers to extend AI assistants like Claude with custom tools and servers, giving the assistant extra powers during a conversation.

2

What are the prerequisites for this tutorial?

Familiarity with Python and LLMs like Claude is required. You need Python 3.10 or higher and the Python MCP SDK version 1.2.0 or higher.

3

How do I connect the server to Claude for Desktop?

Edit Claude for Desktop’s configuration file (`claude_desktop_config.json`) and add the server under `mcpServers` with the `uv` command, an absolute path to the project directory, and the script name.

4

Why can’t I use Claude.ai instead of Claude for Desktop?

Because servers are run locally; MCP currently only supports desktop hosts, not web‑based clients.

5

What capabilities can an MCP server provide beyond tools?

MCP servers can also provide **Resources** (file‑like data readable by clients) and **Prompts** (pre‑written templates for tasks). This tutorial focuses on tools.

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