@mcpx-digital/json-tools

MCP server for everyday JSON/JSONC work on local files and strings.

Validate JSON or JSONC, get/set values with jq-like paths, pretty-print or minify, validate against JSON Schema (Ajv), and diff two documents — from Cursor or any MCP client.

Local only. Tools accept file paths or inline strings. They do not fetch URLs, scrape the web, or call external APIs.

Install (MCPX / npx)

npx -y @mcpx-digital/json-tools

Prepared for npm as @mcpx-digital/json-tools. Until published, run from a local clone.

Related MCP server: Universal JSON Agent MCP

Cursor mcp.json example

{
  "mcpServers": {
    "json-tools": {
      "command": "npx",
      "args": ["-y", "@mcpx-digital/json-tools"]
    }
  }
}

Local clone:

{
  "mcpServers": {
    "json-tools": {
      "command": "node",
      "args": ["/absolute/path/to/json-tools-mcp/index.js"]
    }
  }
}

Tools

Example prompts

• “Validate this JSONC config and pretty-print it”

• “Get .dependencies.react from package.json”

• “Diff these two API response fixtures”

• “Validate data.json against schema.json”

Development

git clone https://github.com/TheoryofShadows/json-tools-mcp.git
cd json-tools-mcp
npm install
npm test
node index.js

Sell / list on MCPX

Suggested listing price: $7.

Install command: npx -y @mcpx-digital/json-tools

License

MIT © TheoryofShadows