This guide shows how to generate images using Kling 2.6 models via the Leonardo.AI REST API.

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-2.6",
    "public": false,
    "parameters": {
      "prompt": "The woman plays with the cat",
      "guidances": {
        "start_frame": [
          {
            "image": {
              "id": "<YOUR_START_IMAGE_ID>",
              "type": "GENERATED"
            }
          }
        ]
      },
      "duration": 5,
      "width": 1080,
      "height": 1920
    }
}
'

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. Set to `5` or `10`.
guidances.start_frame	`array`	Maximum 1 item. Each item includes image.id and image.type (`GENERATED` or `UPLOADED`).
height	`number`	Sets the height of the output video in pixels.
model	`string`	Specifies the model used for generation. Set to `kling-2.6`.
prompt	`string`	Text description of the video content to generate. Maximum of 1500 characters.
public	`boolean`	Controls whether the generated video is public (true) or private (false).
width	`number`	Sets the width of the output video in pixels.

Height and Width Combinations

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

Aspect Ratio	Width	Height
16:9 (Landscape)	1920	1080
1:1 (Square)	1440	1440
9:16 (Portrait)	1080	1920