JSON Splitter and Merger MCP server

The JSON MCP server is a powerful tool that enables Large Language Models (LLMs) to efficiently work with JSON files. It provides specialized functionality for splitting, merging, and manipulating JSON data, making it easier for AI assistants to handle complex JSON operations.

Key Features

• Fast and lightweight implementation
• LLM-friendly functionality for JSON manipulation
• Specialized tools for common JSON operations

Installation Options

Global Installation

You can install the JSON MCP server globally on your system:

npm install -g json-mcp-server@latest

After global installation, run the server with:

json-mcp-server

Using npx (Recommended)

The simplest way to run the latest version without installation:

npx json-mcp-server@latest

VS Code Integration

To configure JSON MCP in VS Code, update your User Settings (JSON) file:

{
  "mcp": {
    "servers": {
      "json-mcp-server": {
        "command": "npx",
        "args": ["json-mcp-server@latest"]
      }
    }
  }
}

Alternatively, you can install it using the VS Code CLI:

code --add-mcp '{"name":"json-mcp-server","command":"npx","args": ["json-mcp-server@latest"]}'

Claude Desktop Integration

If you're using Claude Desktop, you can install via Smithery:

npx -y @smithery/cli install @VadimNastoyashchy/json-mcp --client claude

Usage

The JSON MCP server provides several specialized tools for working with JSON files:

Split Tool

The split tool divides a JSON file into multiple smaller files with a specified number of objects per file.

Example usage:

Split JSON file from /path/to/your/file.json
5 objects per file

This command will split the JSON file located at the specified path into multiple files, each containing 5 JSON objects.

Merge Tool

The merge tool combines multiple JSON files from a directory into a single JSON file.

Example usage:

Merge json files from /path/to/your/folder

This command will take all JSON files in the specified directory and merge them into a single JSON file.

After configuration, these tools become available for use with your GitHub Copilot agent in VS Code or directly through the command line.

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "json-mcp-server" '{"command":"npx","args":["json-mcp-server@latest"]}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "json-mcp-server": {
            "command": "npx",
            "args": [
                "json-mcp-server@latest"
            ]
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

{
    "mcpServers": {
        "json-mcp-server": {
            "command": "npx",
            "args": [
                "json-mcp-server@latest"
            ]
        }
    }
}

3. Restart Claude Desktop for the changes to take effect