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JSON MCP

JSON MCP

Local
npmjs.comDeveloper Tools15Updated 74w ago
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About JSON MCP

JSON MCP is an MCP server for LLMs to work with JSON files. Its documented tools split and merge files and find or validate data against conditions.

Key features

  1. 01Split JSON files
  2. 02Merge JSON files
  3. 03Find data in JSON
  4. 04Validate data by conditions

Use cases

  1. 01Divide a JSON file into object groups
  2. 02Combine JSON files from a folder
  3. 03Find specific JSON data
  4. 04Check JSON data against conditions

MCP support

It exposes JSON file operations as tools for MCP clients, including splitting and merging; the README also describes finding and validating data.

#json#mcp

Configuration

Local server config is the same for every client. Copy it into your client’s MCP config file.

mcp.json · Universal config
{
  "mcpServers": {
    "json": {
      "command": "npx",
      "args": [
        "-y",
        "json-mcp-server"
      ]
    }
  }
}
Run commandnpx -y json-mcp-server

Local servers need a runtime on your machine (e.g. Node.js 18+). Config file locations differ by client; see your client’s docs.

Packages
npmjson-mcp-server

Tools

2

Saved tool list · updated 3w ago

This tool takes no parameters.

Details

From the project README

JSON MCP

Smithery Badge

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.

README image

🌟 Key Features

✅ Fast and lightweight
✅ LLM-friendly functionality

🎥 Demo

Below is a demo showcasing the split functionality:

Demo: Split JSON

🔧 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

Install in VS Code

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

Comments

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New to MCP?

From what the protocol is to installing your first server, these answers cover most first questions.

An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.