Kling 2.6 — API reference

Kling 2.6 uses the model ID kling-video/motion-control/pro. Kling 2.6 Motion Control (Pro) generates videos by animating a source image using the motion from a provided video. Users can control character orientation and choose to retain the original video's sound for customized video creation.

1. Calling the API

Send requests to https://api.higgsfield.ai/kling-video/motion-control/pro with a JSON body matching the parameters below.

Install

Install an official server-side SDK. cURL needs no package.

npm install @higgsfield/client

Setup

Keep credentials in server-side environment variables. The SDKs accept the same KEY_ID:KEY_SECRET value under their documented variable names.

export HF_CREDENTIALS="YOUR_KEY_ID:YOUR_KEY_SECRET" # TypeScript
export HF_KEY="YOUR_KEY_ID:YOUR_KEY_SECRET"         # Python and cURL

Request parameters

Parameter	Type	Required	Default	Description
`prompt`	`string`	No	`""`	Prompt.
`image_url`	`string`	Yes	`—`	Image URL.
`video_url`	`string`	Yes	`—`	Video URL.
`keep_original_sound`	`string`	No	`"yes"`	Keep original sound. Options: yes, no.
`character_orientation`	`string`	No	`"video"`	Generate the orientation of the characters in the video, which can be selected to match the image or the video. Options: image, video.

2. Authentication

The official SDKs read credentials from the server environment and send the required Authorization: Key KEY_ID:KEY_SECRET header.

API Key

Never expose the secret in browser-side code or commit it to source control. The TypeScript SDK is server-side only. For direct HTTP calls, use:

Authorization: Key $HF_KEY

3. Queue

subscribe submits the asynchronous request and waits for a terminal result. The TypeScript SDK polls automatically when withPolling: true; the Python SDK's synchronous subscribe call also waits. A completed request returns the generated file in the video field.

Submit and wait

import { config, higgsfield } from "@higgsfield/client/v2";

config({
  credentials: process.env.HF_CREDENTIALS,
});

const result = await higgsfield.subscribe(
  "kling-video/motion-control/pro",
  {
    input: {
      "prompt": "",
      "image_url": "https://example.com/input.jpg",
      "video_url": "https://example.com/input.mp4",
      "keep_original_sound": "yes",
      "character_orientation": "video"
    },
    withPolling: true,
  },
);

console.log(result);

Explicit lifecycle control

Use the Python SDK when a worker needs explicit status, result, or cancellation control for an existing request. The TypeScript v2 client currently exposes automatic polling through subscribe.

import higgsfield_client

request_id = "{request_id}"
status = higgsfield_client.status(request_id=request_id)
result = higgsfield_client.result(request_id=request_id)
higgsfield_client.cancel(request_id=request_id)