FullJourneyFastStandard

Add Watermark

Add a text watermark to any video — simple, fast brand protection for generated or user content at 2 credits per video.

1 credits

per video

Text watermark on any video

Adjustable size

2 credits per video

Run it right now

Test this model instantly in the Console Playground — no code required

Use with AI Assistant

Copy usage instructions for Claude, ChatGPT, or other AI

llms.txtllms.txt ↗

Quick Start

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "charlesmccarthy/addwatermark",
  "input": {
    "video": "https://example.com/generated.mp4",
    "watermark": "CORE.TODAY",
    "size": 48
  }
}'

Parameters

Parameter	Type	Required	Default	Description
`video`	string	Yes	-	Video to watermark
`size`	integer	No	40	Watermark font size (1-500)
`watermark`	string	No	FULLJOURNEY.AI	Watermark text to overlay

How to Provide File Input

There are 3 ways to provide files for the video parameter:

Recommended

Direct Upload (Multipart)

Attach files directly to POST /v1/predictions/upload. No separate upload step needed.

curl -X POST "https://api.core.today/v1/predictions/upload" \
  -H "X-API-Key: cdt_your_api_key" \
  -F "model=charlesmccarthy/addwatermark" \
  -F 'input={"prompt":"your prompt here"}' \
  -F "file:video=@your_file.png"

Image URL

Pass a publicly accessible URL directly. You can also use file_url from the Storage API.

{
  "model": "charlesmccarthy/addwatermark",
  "input": {
    "prompt": "your prompt here",
    "video": "https://example.com/image.jpg"
  }
}

See the File Upload docs for more upload methods including Presigned URLs.

Common Parameters

Common parameters used when calling POST /v1/predictions.

Parameter	Type	Required	Default	Description
`model`	string	Yes	-	Model identifier
`input`	object	Yes	-	Object containing the model-specific parameters from the table above
`output_folder`	string	No	-	Folder path for output files (max 256 chars, '..' not allowed)
`webhook_url`	string	No	-	Webhook URL to call on completion
`is_public`	boolean	No	false	If true, output files are also available via permanent public URLs

Examples

Brand a Generated Video

Stamp your brand on an AI-generated clip

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "charlesmccarthy/addwatermark",
  "input": {
    "video": "https://example.com/generated.mp4",
    "watermark": "CORE.TODAY",
    "size": 48
  }
}'