Design
Add corner watermarks to images with customizable positioning, size, opacity, and multiple corner options
Call this tool from your code in three languages.
# 1) Request a presigned URL → returns { uploadUrl, storageKey }
curl -X POST 'https://api.elysiatools.com/api/upload/presign/image-watermark-corner' \
-H 'Content-Type: application/json' \
-d '{"filename":"imageFile.ext","contentType":"application/octet-stream","size":12345}'
curl -X POST 'https://api.elysiatools.com/api/upload/presign/image-watermark-corner' \
-H 'Content-Type: application/json' \
-d '{"filename":"watermarkImageFile.ext","contentType":"application/octet-stream","size":12345}'
# 2) PUT the file bytes directly to the presigned uploadUrl
curl -X PUT '<presigned uploadUrl>' \
--data-binary @/path/to/file.ext
# 3) Call the tool, passing the returned storageKey for each file field
curl -X POST 'https://api.elysiatools.com/en/api/tools/image-watermark-corner' \
-F 'imageFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
-F 'watermarkImageFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
-F 'cornerPositions=bottom-right' \
-F 'scale=0.2' \
-F 'opacity=0.7' \
-F 'rotation=0' \
-F 'margin=20' \
-F 'offsetX=0' \
-F 'offsetY=0' \
-F 'blendMode=over' \
-F 'mirrorCorners=false' \
-F 'rotateCorners=false' \
-F 'autoSize=false'Send a POST request with your inputs as JSON. File parameters require a separate upload first.
POST https://api.elysiatools.com/en/api/tools/image-watermark-corner| Name | Type | Required | Description |
|---|---|---|---|
| imageFile | fileupload required | Yes | — |
| watermarkImageFile | fileupload required | Yes | — |
| cornerPositions | select | Yes | — |
| scale | number | No | — |
| opacity | number | No | — |
| rotation | number | No | — |
| margin | number | No | — |
| offsetX | number | No | — |
| offsetY | number | No | — |
| blendMode | select | No | — |
| mirrorCorners | checkbox | No | — |
| rotateCorners | checkbox | No | — |
| autoSize | checkbox | No | — |
File result
{
"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)"
}Add this tool to your Model Context Protocol server so AI agents can list and call it.
Add this block to your MCP client configuration:
{
"mcpServers": {
"elysiatools-image-watermark-corner": {
"name": "image-watermark-corner",
"description": "Add corner watermarks to images with customizable positioning, size, opacity, and multiple corner options",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=image-watermark-corner",
"command": "",
"args": [],
"env": {},
"isActive": true,
"type": "sse"
}
}
}After connecting to the SSE endpoint, list the exposed tools:
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/list"
}Invoke the tool by its id, passing arguments built from its parameters:
{
"jsonrpc": "2.0",
"id": 2,
"method": "tools/call",
"params": {
"name": "image-watermark-corner",
"arguments": {
"imageFile": "https://example.com/file.ext",
"watermarkImageFile": "https://example.com/file.ext",
"cornerPositions": [
"bottom-right"
],
"scale": 0.2,
"opacity": 0.7,
"rotation": 0,
"margin": 20,
"offsetX": 0,
"offsetY": 0,
"blendMode": "over",
"mirrorCorners": false,
"rotateCorners": false,
"autoSize": false
}
}
}Questions or issues? Contact [email protected]