Json Diff

Data REST API MCP

Returns the semantic differences between two JSON documents as a list of added, removed and modified paths with their old and new values, plus counts. Compares structure and values, not text lines; key order is ignored by default.

This page documents the MCP tool findutils:json_diff. See the REST reference →

Use in the browser View as Markdown

Call it over MCP

Tool name findutils:json_diff · no API keys · 120 requests/min per IP

Claude Code

claude mcp add findutils --transport http https://mcp.findutils.com/

Claude Desktop — claude_desktop_config.json

{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/"
    }
  }
}

Raw JSON-RPC (any MCP client) — verified example

curl -X POST https://mcp.findutils.com/ \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "json_diff",
      "arguments": {
        "left": "{\"a\":1,\"b\":2}",
        "right": "{\"a\":1,\"b\":3}"
      }
    }
  }'

Input schema

Argument	Type	Required	Description
left	string	yes	The original JSON document (text).
right	string	yes	The changed JSON document (text).
ignore_key_order	boolean	no	Sort object keys before comparing so key order does not count as a change. Default: true. Default: true.
include_unchanged	boolean	no	Also list unchanged leaf paths. Default: false. Default: false.

Example arguments (verified)

{
  "left": {
    "a": 1,
    "b": 2
  },
  "right": {
    "a": 1,
    "b": 3
  }
}

Arguments that carry JSON as a string are shown decoded for readability. The Copy button copies the exact wire arguments.

Also a REST endpoint

The same tool answers plain HTTP at POST /api/tools/json-diff/execute — no key, 60 requests/min.

Open the REST reference for Json Diff →

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