Sample Request

curl --request POST \
     --url https://cloud.leonardo.ai/api/rest/v2/generations \
     --header 'accept: application/json' \
     --header 'authorization: Bearer <YOUR_API_KEY>' \
     --header 'content-type: application/json' \
     --data '
{
    "model": "kling-4.0",
    "public": false,
    "parameters": {
      "prompt": "A lone surfer paddles out at sunrise as waves roll toward the shore",
      "duration": 10,
      "width": 2520,
      "height": 1080,
      "motion_has_audio": true,
      "guidances": {
        "start_frame": [
          {
            "image": {
              "id": "<YOUR_START_IMAGE_ID>",
              "type": "GENERATED"
            }
          }
        ]
      }
    }
}
'

Recipe

API Request Endpoint, Headers, Parameters

Endpoint

https://cloud.leonardo.ai/api/rest/v2/generations

Headers

--header "accept: application/json" \
--header "authorization: Bearer <YOUR_API_KEY>" \
--header "content-type: application/json"

Body Parameters

Parameter	Type	Definition
duration	`number`	Length of the generated video in seconds. Set to `3` up to `30`. Defaults to `5`.
guidances.end_frame	`array`	Maximum 1 item. Each item includes image.id and image.type (`GENERATED` or `UPLOADED`).
guidances.image_reference	`array`	Array of up to 10 reference images used to guide the visual style or content of the generation. Each item includes image.id and image.type (`GENERATED` or `UPLOADED`).
guidances.start_frame	`array`	Maximum 1 item. Each item includes image.id and image.type (`GENERATED` or `UPLOADED`).
guidances.video_reference_base	`array`	Specify the video to edit. Maximum 1 item. Each item includes video.id and video.type (`GENERATED` or `UPLOADED`). The reference video must be `700` to `4553` pixels in width and height, and `3` to `30` seconds long.
height	`number`	Sets the height of the video in pixels. Defaults to `720`.
model	`string`	Required. Specifies the model used for generation. Set to `kling-4.0`.
motion_has_audio	`boolean`	Controls whether to generate audio (`true`) or not (`false`). Defaults to `true`.
prompt	`string`	Required. Text description of the video content to generate. Maximum of 2500 characters.
public	`boolean`	Controls whether the generated video is public (true) or private (false).
quantity	`number`	Number of videos to generate. Set to `1`. Defaults to `1`.
width	`number`	Sets the width of the video in pixels. Defaults to `1280`.

Dimensions

The API accepts width and height parameters in the following aspect ratio combinations:

Resolution	Aspect Ratio	Pixel Values (Width x Height)
720p	16:9	1280x720
	1:1	960x960
	9:16	720x1280
	21:9	1470x630
1080p	16:9	1920x1080
	1:1	1440x1440
	9:16	1080x1920
	21:9	2520x1080

Note: width and height must be specified together. When both are omitted, the generation defaults to 1280x720.