Design

Image Rounded Corners

Add rounded corner effects to images with adjustable radius and corner selection

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-rounded-corners' \
  -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-rounded-corners' \
  -F 'imageFile=/path/to/file.ext' \
  -F 'radius=10' \
  -F 'cornerMode=all' \
  -F 'topLeft=0' \
  -F 'topRight=0' \
  -F 'bottomLeft=0' \
  -F 'bottomRight=0' \
  -F 'backgroundColor=#ffffff' \
  -F 'format=original' \
  -F 'quality=90'

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-rounded-corners

Parameters

Name	Type	Required	Description
imageFile	fileupload required	Yes	Upload any image file (JPEG, PNG, WebP, GIF, BMP, TIFF) to apply rounded corners
radius	number	No	Radius of rounded corners. Will be limited to image dimensions
cornerMode	select	Yes	Choose which corners to apply rounded effect to
topLeft	number	No	Radius for top left corner. Used only in custom mode
topRight

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-rounded-corners": {
      "name": "image-rounded-corners",
      "description": "Add rounded corner effects to images with adjustable radius and corner selection",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=image-rounded-corners",
      "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-rounded-corners",
    "arguments": {
  "imageFile": "https://example.com/file.ext",
  "radius": 10,
  "cornerMode": "all",
  "topLeft": 0,
  "topRight": 0,
  "bottomLeft": 0,
  "bottomRight": 0,
  "backgroundColor": "#ffffff",
  "format": "original",
  "quality": 90
}
  }
}

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]