JSON MCP Server (@gongrzhe/server-json-mcp@1.0.3)

A JSON Model Context Protocol (MCP) server implementation for querying and manipulating JSON data. This server enables LLMs to interact with JSON data through a set of standardized tools.

Installation & Usage

# Using npx with specific version (recommended)
npx @gongrzhe/server-json-mcp@1.0.3

# Install specific version globally
npm install -g @gongrzhe/server-json-mcp@1.0.3

# Run after global installation
server-json-mcp

Components

Tools

query
- Query JSON data using JSONPath syntax with extended operations
- Input:
  - url (string): URL of the JSON data source
  - jsonPath (string): JSONPath expression with optional operations
filter
- Filter JSON data using conditions
- Input:
  - url (string): URL of the JSON data source
  - jsonPath (string): Base JSONPath expression
  - condition (string): Filter condition

Supported Operations

Array Operations

Slicing: $[0:5], $[-3:], $[1:4]
Sorting: $.sort(price), $.sort(-price)
Distinct: $.distinct()
Transformations:
- Map: $.map(fieldName)
- Flatten: $.flatten()
- Union: $.union([1,2,3])
- Intersection: $.intersection([1,2,3])

String Operations

Case: $.toLowerCase(), $.toUpperCase()
Tests: $.startsWith('test'), $.endsWith('test')
Search: $.contains('test'), $.matches('pattern')

Numeric Operations

Math: $.math(+10), $.pow2()
Rounding: $.round(), $.floor(), $.ceil()
Functions: $.abs(), $.sqrt()

Date Operations

Format: $.format('YYYY-MM-DD')
Check: $.isToday()
Modify: $.add(1, 'days')

Aggregation Operations

Group: $.groupBy(category)
Stats: $.sum(price), $.avg(price), $.min(price), $.max(price)

Configuration

Usage with Claude Desktop

To use this server with the Claude Desktop app, add the following configuration to your claude_desktop_config.json:

{
  "json": {
    "command": "npx",
    "args": [
      "@gongrzhe/server-json-mcp@1.0.3"
    ]
  }
}

Alternatively, you can use the node command directly if you have the package installed:

{
  "json": {
    "command": "node",
    "args": [
      "path/to/build/index.js"
    ]
  }
}

Development

Building from Source

Clone the repository
Install dependencies:
npm install
Build the project:
npm run build

Notes

All JSONPath expressions start with $ representing the root object
Array indices are zero-based
String values in operations should be wrapped in quotes
Date operations support 'days', 'months', and 'years' units
Numeric operations support basic arithmetic operators (+, -, *, /)

License

MIT