kling-v2-1

This page consolidates Kling 2.1 image-to-video creation and task queries. Each tab keeps its request, response, and fields together.

Image to video

Create task

POST /kling/v1/videos/image2video

cURL

curl --request POST \
  --url https://www.anyfast.ai/kling/v1/videos/image2video \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "model_name": "kling-2.1",
    "image": "https://example.com/start.png",
    "image_tail": "https://example.com/end.png",
    "prompt": "The subject turns toward the window",
    "duration": "5",
    "mode": "std",
    "watermark_info": {"enabled": false}
  }'

Request headers

string

required

Bearer authentication in the form Bearer YOUR_API_KEY.

string

default:"application/json"

required

Data exchange format. Use application/json.

Request body

string

required

Must be kling-2.1.

string

required

Start-frame URL or raw Base64.

string

Optional end frame. Start-and-end-frame generation requires 1080p pro mode.

string

Positive prompt, up to 2,500 characters.

string

Negative prompt, up to 2,500 characters.

string

default:"std"

std for 720p or pro for 1080p.

string

default:"5"

5 or 10 seconds.

object

Set enabled to request an additional watermarked result.

Image requirements

Use a public URL or raw Base64 without a data URI prefix. JPG, JPEG, and PNG are supported. Files must be no larger than 10 MB, both sides at least 300 px, and the aspect ratio between 1:2.5 and 2.5:1.

Create response

200

{
  "id": "860260753860210752",
  "task_id": "860260753860210752",
  "object": "video",
  "model": "kling-v2-1",
  "status": "queued",
  "progress": 0,
  "created_at": 1773130665
}

string

AnyFast task ID.

string

Task ID, equal to id.

string

Object type, always video.

string

Public model ID used for the task.

string

Initial status, always queued.

integer

Initial progress, always 0.

integer

Creation time as a Unix timestamp in seconds.

Query task by ID

GET /kling/v1/videos/image2video/{task_id}

cURL

curl --request GET \
  --url https://www.anyfast.ai/kling/v1/videos/image2video/TASK_ID \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json'

Request headers

string

required

Bearer authentication in the form Bearer YOUR_API_KEY.

string

default:"application/json"

required

Data exchange format. Use application/json.

Path parameters

string

required

The image-to-video task ID returned by the create endpoint.

Task result

200

{
  "code": 0,
  "message": "",
  "data": {
    "task_id": "asyntask_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
    "task_status": "succeed",
    "task_result": {
      "videos": [
        {"url": "https://example.com/result.mp4", "duration": "5"}
      ]
    },
    "created_at": 1784720890000,
    "updated_at": 1784720949000
  }
}

integer

0 indicates that the query succeeded.

string

Error information; empty for a successful query.

string

Queried task ID.

string

submitted, processing, succeed, or failed.

string

Failure details when the task fails.

object[]

Generated videos, returned after success.

string

Temporary generated-video URL.

string

Actual duration in seconds.

integer

Creation Unix timestamp in milliseconds.

integer

Last update Unix timestamp in milliseconds.

Generated result URLs are removed after 30 days. Save the files promptly.

Kling 2.1 does not provide text-to-video. It also does not support audio, specified voices, multi-shot, motion brush, camera control, or cfg_scale.

Overview

Native Compatible Endpoints

Model APIs

Create task

Request headers

Request body

Image requirements

Create response

Query task by ID

Request headers

Path parameters

Task result

​Create task

​Request headers

​Request body

​Image requirements

​Create response

​Query task by ID

​Request headers

​Path parameters

​Task result

Create task

Request headers

Request body

Image requirements

Create response

Query task by ID

Request headers

Path parameters

Task result