Add Number MCP Server

@haojiasheng

Basic information

About Add Number MCP Server

Add Two Number

Add Number MCP Server config

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

{
  "mcpServers": {
    "add-number-server": {
      "command": "npx",
      "args": [
        "-y",
        "add-number-server"
      ]
    }
  }
}

Add Number MCP Server tools

Create new text notes

Overview

What is Add Number?

Add Number is a TypeScript-based MCP server that implements a simple notes system. It demonstrates core MCP concepts by providing resources for text notes, tools for creating new notes, and prompts for generating summaries of notes.

How to use Add Number?

Install dependencies with npm install, build with npm run build, and add the server configuration to Claude Desktop's config file. The server can be run directly or debugged using the MCP Inspector.

Key features of Add Number

Resources represent text notes with URIs and metadata
Tools allow creating new notes (create_note)
Prompts generate summaries of stored notes (summarize_notes)
TypeScript-based with simple development setup

Use cases of Add Number

Store and retrieve text notes with unique note:// URIs
Create new notes using the create_note tool
Generate structured prompts for LLM summarization of all notes

Frequently asked questions

What does Add Number do?

It implements a simple notes system with resources, tools, and prompts, demonstrating core MCP concepts.

How do I install and build Add Number?

Run `npm install` to install dependencies, then `npm run build` to compile. For auto-rebuild during development, use `npm run watch`.

How do I configure Add Number with Claude Desktop?

Add the server configuration to the Claude Desktop config file, pointing to the built `index.js` file. The config file is located at `~/Library/Application Support/Claude/claude_desktop_config.json` on macOS and `%APPDATA%/Claude/claude_desktop_config.json` on Windows.

How can I debug Add Number?

Use the MCP Inspector by running `npm run inspector`. It provides a URL to access debugging tools in your browser.

Where are notes stored?

Notes are stored in the server’s in-memory state; they are not persisted to disk.

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