Design

Image Difference

Calculate the difference between two images to identify changes or create comparison masks

file· File resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

# 1) Upload each file first → returns { filePath }
curl -X POST 'https://api.elysiatools.com/upload/image-difference' \
  -F 'file=@/path/to/imageFile1.ext'
curl -X POST 'https://api.elysiatools.com/upload/image-difference' \
  -F 'file=@/path/to/imageFile2.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/image-difference' \
  -F 'imageFile1=/path/to/file.ext' \
  -F 'imageFile2=/path/to/file.ext' \
  -F 'differenceMode=absolute' \
  -F 'format=png' \
  -F 'quality=95'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/image-difference

Parameters

Name	Type	Required	Description
imageFile1	fileupload required	Yes	First image for comparison
imageFile2	fileupload required	Yes	Second image for comparison
differenceMode	select	No	How to calculate the difference between images
format	select	No	Output format for the result image (PNG recommended for accuracy)
quality	number	No	Output quality for lossy formats

File-type parameters must be uploaded first via POST /upload/image-difference, then the returned filePath is passed to the corresponding file field.

Response format

File result

JSON

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-image-difference": {
      "name": "image-difference",
      "description": "Calculate the difference between two images to identify changes or create comparison masks",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=image-difference",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "image-difference",
    "arguments": {
  "imageFile1": "https://example.com/file.ext",
  "imageFile2": "https://example.com/file.ext",
  "differenceMode": "absolute",
  "format": "png",
  "quality": 95
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

File parameters accept a public file URL only (https://…). Local paths, data: URIs, and Base64 strings are not supported.

Questions or issues? Contact [email protected]