# Add Watermark - Core.Today AI API

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

- **Provider**: FullJourney
- **Model ID**: charlesmccarthy/addwatermark
- **Category**: Video Generation
- **Credits**: 1 per video
- **Speed**: Fast
- **Quality**: Standard

## Features
- Text watermark on any video
- Adjustable size
- 2 credits per video

## Use Cases
- Branding generated videos
- Preview/draft watermarking
- Copyright marking for UGC

## API Endpoint

Base URL: https://api.core.today/v1
Create Prediction: POST /predictions
Get Status: GET /predictions/{job_id}

## Authentication
Header: X-API-Key: YOUR_API_KEY

## Input Parameters

### Required
- **video**: string - Video to watermark

### Optional
- **size**: integer (default: 40) - Watermark font size (1-500)
- **watermark**: string (default: FULLJOURNEY.AI) - Watermark text to overlay

## Examples

### Brand a Generated Video
Stamp your brand on an AI-generated clip
```json
{
  "model": "charlesmccarthy/addwatermark",
  "input": {
    "video": "https://example.com/generated.mp4",
    "watermark": "CORE.TODAY",
    "size": 48
  }
}
```

## Response Format
```json
{
  "job_id": "abc123",
  "status": "pending | processing | completed | failed",
  "result": "URL or data (when completed)"
}
```

## Usage Flow
1. POST /predictions with model and input -> receive job_id
2. GET /predictions/{job_id} -> poll until status is completed or failed
3. Result contains output URL(s)

## Tips
- Chain after video generation to deliver branded previews
- Use a smaller size (24-32) for subtle corner marks

## Documentation
https://replicate.com/charlesmccarthy/addwatermark