Kling 3.0 Pro — API reference

Kling 3.0 Standard uses the model ID kling-video/v3.0/pro/image-to-video. Kling 3.0 Image to Video (Pro) generates videos from a single image URL with optional sound and customizable duration up to 15 seconds. It supports multi-shot sequences with multiple prompts and fine-tuning via CFG scale for creative video outputs.

1. Calling the API

Send requests to https://api.higgsfield.ai/kling-video/v3.0/pro/image-to-video 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
`sound`	`string`	No	`"on"`	Generate sound. Options: on, off.
`prompt`	`string`	No	`—`	Prompt.
`duration`	`integer`	No	`5`	Duration. Minimum: 3. Maximum: 15.
`elements`	`array[string]`	No	`—`
`cfg_scale`	`number`	No	`0.5`	CFG Scale. Minimum: 0. Maximum: 1.
`image_url`	`string`	Yes	`—`	Image URL.
`multi_shots`	`boolean`	No	`false`
`multi_prompt`	`array[object]`	No	`—`
`last_image_url`	`string`	No	`—`	Image URL.

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/v3.0/pro/image-to-video",
  {
    input: {
      "sound": "on",
      "duration": 5,
      "cfg_scale": 0.5,
      "image_url": "https://example.com/input.jpg",
      "multi_shots": false
    },
    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)