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# Kling 2.6 Motion Control

POST https://api.beatapi.io/v1/videos/tasks
Content-Type: application/json

Transfer motion from one uploaded MP4/MOV video to one uploaded character image at 720p or 1080p; image orientation supports up to 10 seconds and video orientation up to 30 seconds.

### Supported modes

| Mode            | Required input                        | Rules                                                                                                                                                             |
| --------------- | ------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Motion transfer | `model`, `images`, `reference_videos` | Upload both assets through `/v1/files`; image orientation supports up to 10 seconds, video orientation up to 30 seconds, and BeatAPI bills the detected duration. |

**Async flow:** Create the task, save `data.id`, then [poll the Task](/quick-guide#get-task-status) with `GET /v1/tasks/{task_id}`. On `succeeded`, read `data.output.media`. On `failed`, read `data.error_code` and `data.error_message`, then follow the [error and retry policy](/quick-guide#errors-and-retry-policy).

**Using a local file?** [upload a local input](/quick-guide#upload-an-input-file) first and pass the returned `data.url`.

Reference: https://docs.beatapi.io/api-reference/video-api/kling-2-6-motion-control

## Authentication

- `Authorization` header (bearer token, required) — Send your API key as `Authorization: Bearer <BEATAPI_API_KEY>`.

## Request

### Headers

- `Idempotency-Key` (string, optional)

### Body (application/json)

This endpoint expects a Kling26MotionControlVideoRequest.

- `model` ("kling-2.6-motion-control", required) — Must be `kling-2.6-motion-control`.
- `images` (list of string, required) — Exactly one character-image URL returned by the current account's `/v1/files` upload.
- `reference_videos` (list of string, required) — Exactly one 3–30 second MP4/MOV URL returned by the current account's `/v1/files` upload. Its detected duration determines billing.
- `prompt` (string, optional) — Optional motion or scene guidance.
- `resolution` (enum, optional, default: 720p) — Output resolution and per-second price tier.
  - Allowed values: `720p`, `1080p`
- `character_orientation` (enum, optional, default: image) — Image orientation supports motion videos up to 10 seconds; video orientation supports up to 30 seconds.
  - Allowed values: `image`, `video`

## Response

### 201

Video generation task accepted

## Errors

### 400 Bad Request Error

Malformed JSON or a field, value or combination this endpoint does not accept (`bad_request`; the message names the field), or input refused by moderation (`content_policy_violation`). Not retryable unchanged.

- `error` (ErrorError, required) — Structured BeatAPI error. Use `code` (or `retryable`) for program logic and retain `request_id` for support.

### 401 Unauthorized Error

No API key (`missing_api_key`), or a key that is wrong, expired, disabled or exhausted (`invalid_api_key`; the message says which). Send it as `Authorization: Bearer <key>`; the key works with or without the `sk-` prefix. Not retryable.

- `error` (ErrorError, required) — Structured BeatAPI error. Use `code` (or `retryable`) for program logic and retain `request_id` for support.

### 402 Payment Required Error

Insufficient balance (`insufficient_credits`). The account balance is zero or below the price of this request. Top up, then send it again; not retryable before that.

- `error` (ErrorError, required) — Structured BeatAPI error. Use `code` (or `retryable`) for program logic and retain `request_id` for support.

### 403 Forbidden Error

The key or account is not permitted to make this call (`forbidden`), for example a model that is not available on free credit (a top-up unlocks it), a request from outside the key's IP allowlist, or a model outside the key's group. Not retryable.

- `error` (ErrorError, required) — Structured BeatAPI error. Use `code` (or `retryable`) for program logic and retain `request_id` for support.

### 409 Conflict Error

The `Idempotency-Key` was already used with a different request body, or the first request with it is still being processed (`idempotency_conflict`). Not retryable unchanged.

- `error` (ErrorError, required) — Structured BeatAPI error. Use `code` (or `retryable`) for program logic and retain `request_id` for support.

### 429 Too Many Requests Error

Too many requests (`rate_limit_exceeded`, including the free-model limits) or too many tasks processing at once (`user_concurrency_exceeded`). Retryable after `Retry-After` seconds (also `error.retry_after_seconds`).

- `error` (ErrorError, required) — Structured BeatAPI error. Use `code` (or `retryable`) for program logic and retain `request_id` for support.

### 500 Internal Server Error

Unexpected internal error (`internal_error`). Retryable; keep `request_id` for support if it persists.

- `error` (ErrorError, required) — Structured BeatAPI error. Use `code` (or `retryable`) for program logic and retain `request_id` for support.

### 503 Service Unavailable Error

The request could not be completed (`processing_unavailable`, `processing_timeout`, `processing_failed` or `result_transfer_failed`). Nothing was charged. Retryable with backoff; `Retry-After` is sent when the wait is known. BeatAPI does not answer 502 or 504.

- `error` (ErrorError, required) — Structured BeatAPI error. Use `code` (or `retryable`) for program logic and retain `request_id` for support.

## Types

### ErrorError

Structured BeatAPI error. Use `code` (or `retryable`) for program logic and retain `request_id` for support.

- `code` (enum, required) — Stable machine-readable error code. `unauthorized` is the deprecated name for a 401; since 2026-09-29 a 401 is `missing_api_key` or `invalid_api_key`. Treat a legacy `unauthorized` like `invalid_api_key`.
  - Allowed values: `bad_request`, `missing_api_key`, `invalid_api_key`, `unauthorized`, `forbidden`, `not_found`, `insufficient_credits`, `idempotency_conflict`, `user_concurrency_exceeded`, `rate_limit_exceeded`, `content_policy_violation`, `processing_unavailable`, `processing_failed`, `processing_timeout`, `result_transfer_failed`, `invalid_signature`, `realtime_disabled`, `realtime_capacity_unavailable`, `realtime_session_expired`, `origin_not_allowed`, `invalid_client_secret`, `transport_not_allowed`, `internal_error`
- `message` (string, required) — English sentence that states the cause; for `bad_request` it names the field. Written for people and logs, not for parsing.
- `retryable` (boolean, required) — Whether making the same call again could succeed. Present on every error; branch on it instead of the status code. True for 429, 500 and 503 (rate_limit_exceeded, user_concurrency_exceeded, internal_error, processing_unavailable, processing_timeout, processing_failed, result_transfer_failed, realtime_capacity_unavailable). False for a request, key or balance that must change first (bad_request, content_policy_violation, missing_api_key, invalid_api_key, insufficient_credits, forbidden, not_found, idempotency_conflict, realtime_disabled and the other realtime credential codes).
- `request_id` (string, required) — Correlation ID to retain for BeatAPI support.
- `retry_after_seconds` (integer, optional) — Seconds to wait before retrying. Present on every 429, and on a 503 when the wait is known; the same value is sent in the `Retry-After` header.
- `docs` (string, optional) — The public Skill page that says what to do about an error. Present on errors answered by the capability endpoints (`/v1/capabilities/search`, `/v1/capabilities/inspect`, `/v1/capabilities/run`); absent on every other endpoint.

## Examples

### Kling 2.6 Motion Control

**Response**

```json
{
  "data": {
    "capability_id": "kling-2.6-motion-control",
    "capability_version": null,
    "completed_at": null,
    "created_at": 1782210000,
    "error_code": null,
    "error_message": null,
    "id": "task_8K2qA",
    "media_type": "video",
    "model": "kling-2.6-motion-control",
    "object": "task",
    "output": null,
    "request_id": "req_abc123",
    "stage": "queued",
    "status": "queued",
    "task_kind": "video",
    "updated_at": 1782210000,
    "usage": {
      "billable_duration_seconds": 15,
      "credits_charged": 0.9,
      "credits_refunded": 0,
      "credits_reserved": 0.9,
      "credits_settled": 0
    }
  }
}
```

**SDK Code**

```python Kling 2.6 Motion Control
import requests

url = "https://api.beatapi.io/v1/videos/tasks"

headers = {"Authorization": "Bearer <token>"}

response = requests.post(url, headers=headers)

print(response.json())
```

```javascript Kling 2.6 Motion Control
const url = 'https://api.beatapi.io/v1/videos/tasks';
const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go Kling 2.6 Motion Control
package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.beatapi.io/v1/videos/tasks"

	req, _ := http.NewRequest("POST", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby Kling 2.6 Motion Control
require 'uri'
require 'net/http'

url = URI("https://api.beatapi.io/v1/videos/tasks")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'

response = http.request(request)
puts response.read_body
```

```java Kling 2.6 Motion Control
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.beatapi.io/v1/videos/tasks")
  .header("Authorization", "Bearer <token>")
  .asString();
```

```php Kling 2.6 Motion Control
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.beatapi.io/v1/videos/tasks', [
  'headers' => [
    'Authorization' => 'Bearer <token>',
  ],
]);

echo $response->getBody();
```

```csharp Kling 2.6 Motion Control
using RestSharp;

var client = new RestClient("https://api.beatapi.io/v1/videos/tasks");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
IRestResponse response = client.Execute(request);
```

```swift Kling 2.6 Motion Control
import Foundation

let headers = ["Authorization": "Bearer <token>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.beatapi.io/v1/videos/tasks")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```

### Motion transfer

**Request**

```json
{
  "model": "kling-2.6-motion-control",
  "images": [
    "https://media.beatapi.io/samples/neon-singer.png"
  ],
  "reference_videos": [
    "https://media.beatapi.io/inputs/motion.mp4"
  ],
  "prompt": "Keep the character identity stable while following the reference motion.",
  "resolution": "720p",
  "character_orientation": "video"
}
```

**Response**

```json
{
  "data": {
    "capability_id": "kling-2.6-motion-control",
    "capability_version": null,
    "completed_at": null,
    "created_at": 1782210000,
    "error_code": null,
    "error_message": null,
    "id": "task_8K2qA",
    "media_type": "video",
    "model": "kling-2.6-motion-control",
    "object": "task",
    "output": null,
    "request_id": "req_abc123",
    "stage": "queued",
    "status": "queued",
    "task_kind": "video",
    "updated_at": 1782210000,
    "usage": {
      "billable_duration_seconds": 15,
      "credits_charged": 0.9,
      "credits_refunded": 0,
      "credits_reserved": 0.9,
      "credits_settled": 0
    }
  }
}
```

**SDK Code**

```python Motion transfer
import requests

url = "https://api.beatapi.io/v1/videos/tasks"

payload = {
    "model": "kling-2.6-motion-control",
    "images": ["https://media.beatapi.io/samples/neon-singer.png"],
    "reference_videos": ["https://media.beatapi.io/inputs/motion.mp4"],
    "prompt": "Keep the character identity stable while following the reference motion.",
    "resolution": "720p",
    "character_orientation": "video"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript Motion transfer
const url = 'https://api.beatapi.io/v1/videos/tasks';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"model":"kling-2.6-motion-control","images":["https://media.beatapi.io/samples/neon-singer.png"],"reference_videos":["https://media.beatapi.io/inputs/motion.mp4"],"prompt":"Keep the character identity stable while following the reference motion.","resolution":"720p","character_orientation":"video"}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go Motion transfer
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.beatapi.io/v1/videos/tasks"

	payload := strings.NewReader("{\n  \"model\": \"kling-2.6-motion-control\",\n  \"images\": [\n    \"https://media.beatapi.io/samples/neon-singer.png\"\n  ],\n  \"reference_videos\": [\n    \"https://media.beatapi.io/inputs/motion.mp4\"\n  ],\n  \"prompt\": \"Keep the character identity stable while following the reference motion.\",\n  \"resolution\": \"720p\",\n  \"character_orientation\": \"video\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby Motion transfer
require 'uri'
require 'net/http'

url = URI("https://api.beatapi.io/v1/videos/tasks")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"model\": \"kling-2.6-motion-control\",\n  \"images\": [\n    \"https://media.beatapi.io/samples/neon-singer.png\"\n  ],\n  \"reference_videos\": [\n    \"https://media.beatapi.io/inputs/motion.mp4\"\n  ],\n  \"prompt\": \"Keep the character identity stable while following the reference motion.\",\n  \"resolution\": \"720p\",\n  \"character_orientation\": \"video\"\n}"

response = http.request(request)
puts response.read_body
```

```java Motion transfer
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.beatapi.io/v1/videos/tasks")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"model\": \"kling-2.6-motion-control\",\n  \"images\": [\n    \"https://media.beatapi.io/samples/neon-singer.png\"\n  ],\n  \"reference_videos\": [\n    \"https://media.beatapi.io/inputs/motion.mp4\"\n  ],\n  \"prompt\": \"Keep the character identity stable while following the reference motion.\",\n  \"resolution\": \"720p\",\n  \"character_orientation\": \"video\"\n}")
  .asString();
```

```php Motion transfer
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.beatapi.io/v1/videos/tasks', [
  'body' => '{
  "model": "kling-2.6-motion-control",
  "images": [
    "https://media.beatapi.io/samples/neon-singer.png"
  ],
  "reference_videos": [
    "https://media.beatapi.io/inputs/motion.mp4"
  ],
  "prompt": "Keep the character identity stable while following the reference motion.",
  "resolution": "720p",
  "character_orientation": "video"
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp Motion transfer
using RestSharp;

var client = new RestClient("https://api.beatapi.io/v1/videos/tasks");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"model\": \"kling-2.6-motion-control\",\n  \"images\": [\n    \"https://media.beatapi.io/samples/neon-singer.png\"\n  ],\n  \"reference_videos\": [\n    \"https://media.beatapi.io/inputs/motion.mp4\"\n  ],\n  \"prompt\": \"Keep the character identity stable while following the reference motion.\",\n  \"resolution\": \"720p\",\n  \"character_orientation\": \"video\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Motion transfer
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [
  "model": "kling-2.6-motion-control",
  "images": ["https://media.beatapi.io/samples/neon-singer.png"],
  "reference_videos": ["https://media.beatapi.io/inputs/motion.mp4"],
  "prompt": "Keep the character identity stable while following the reference motion.",
  "resolution": "720p",
  "character_orientation": "video"
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.beatapi.io/v1/videos/tasks")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```