mcp server

json-mcp

JSON MCP Server

VadimNastoyashchy/json-mcpcommunitylistedunreviewed

Use tool

Set up

Runs on your computer. Pick your agent and operating system.

Before you start

Node.js 20 or newer

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

{
  "mcpServers": {
    "vadimnastoyashchy-json-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "json-mcp-server"
      ]
    }
  }
}

same format Cursor, GitHub Copilot CLI, Junie, JetBrains AI Assistant, Augment (Auggie CLI), Factory Droid, Kiro, Devin CLI +12

Values in angle brackets are placeholders. Restart Claude Desktop after editing its config.Claude Desktop docs

README

synced Oct 14, 2026

JSON MCP

The Model Context Protocol (MCP) server empowers LLMs to efficiently interact with JSON files. With JSON MCP, you can split, merge, and find specific data, validate within JSON files based on defined conditions.

🌟 Key Features

✅ Fast and lightweight
✅ LLM-friendly functionality

🎥 Demo

Below is a demo showcasing the split functionality:

🔧 Use Cases (Tools)

1. `split`

Split a JSON file into a specified number of objects.

Note: The file path must be provided.

Prompt Example:

Split JSON file from /Users/json-mcp/tests/merged.json
5 objects per file

2. `merge`

Merge JSON files into a one JSON file

Note: The folder path should be provided

Prompt Example:

Merge json files from /Users/json-mcp/tests

⚙️ Configuration

VS Code Manual Configuration

To configure the JSON MCP server manually in VS Code, update the User Settings (JSON) file:

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

Installation in VS Code

You can install the JSON MCP server using the VS Code CLI:

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

After installation, the JSON MCP server will be available for use with your GitHub Copilot agent in VS Code.

Claude Desktop

To install json-mcp for Claude Desktop automatically via Smithery:

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

⚙️ Installation Server

Install globally

npm install -g json-mcp-server@latest

Run after global installation

json-mcp-server

Using npx with latest version (recommended)

npx json-mcp-server@latest