Design

Image Sobel Edge Detection

Apply Sobel operator for edge detection to highlight boundaries and contours in images

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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-sobel' \
  -F 'file=@/path/to/imageFile.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/image-sobel' \
  -F 'imageFile=/path/to/file.ext' \
  -F 'direction=both' \
  -F 'threshold=0' \
  -F 'outputMode=grayscale' \
  -F 'normalize=true'

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-sobel

Parameters

Name	Type	Required	Description
imageFile	fileupload required	Yes	Image to apply Sobel edge detection
direction	select	No	Direction of edge detection to apply
threshold	number	No	Threshold for edge detection (0-255). Higher values detect only strong edges
outputMode	select	No	How to render the edge detection results
normalize	checkbox

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-sobel": {
      "name": "image-sobel",
      "description": "Apply Sobel operator for edge detection to highlight boundaries and contours in images",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=image-sobel",
      "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-sobel",
    "arguments": {
  "imageFile": "https://example.com/file.ext",
  "direction": "both",
  "threshold": 0,
  "outputMode": "grayscale",
  "normalize": true
}
  }
}

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).

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