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 HTTP endpoint POST /api/tools/json-diff/execute. See the MCP reference →

Use in the browser View as Markdown

Call it over REST

POST https://api.findutils.com/api/tools/json-diff/execute · no API keys · 60 requests/min per IP

Execute — verified arguments

curl -X POST https://api.findutils.com/api/tools/json-diff/execute \
  -H "Content-Type: application/json" \
  -d '{
    "left": "{\"a\":1,\"b\":2}",
    "right": "{\"a\":1,\"b\":3}"
  }'

Parameter schema for this endpoint

curl https://api.findutils.com/api/tools/json-diff

Interactive docs · OpenAPI 3.1 spec · All REST tools

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 an MCP tool

Claude, Cursor, and any MCP client can call this tool as findutils:json_diff after one connect command.

Connect once

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

Open the MCP reference for Json Diff →

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