kling-v2-1-master

Kling 2.1 Master text-to-video and image-to-video Legacy APIs.

Text to Video

Create task

POST /kling/v1/videos/text2video

cURL

curl --request POST \
  --url https://www.anyfast.ai/kling/v1/videos/text2video \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "model_name": "kling-2.1-master",
    "prompt": "A train crosses a snow-covered valley",
    "negative_prompt": "blurry, distorted",
    "duration": "5",
    "mode": "pro",
    "aspect_ratio": "16:9",
    "watermark_info": {"enabled": false}
  }'

200

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

model_name · string · required

Must be kling-2.1-master.

prompt · string · required

Positive prompt, up to 2,500 characters.

negative_prompt · string

Content to avoid, up to 2,500 characters.

mode · string · default: "std"

std for 720p or pro for 1080p.

duration · string · default: "5"

5 or 10 seconds.

aspect_ratio · string · default: "16:9"

16:9, 9:16, or 1:1.

watermark_info · object

Set enabled to request an additional watermarked result.

Query task by ID

GET /kling/v1/videos/text2video/{task_id}

Request headers

Authorization · string · required

Bearer authentication in the form Bearer YOUR_API_KEY.

Content-Type · string · default: "application/json" · required

Data exchange format. Use application/json.

Path parameters

task_id · string · required

Text-to-video task ID returned by the create endpoint.

cURL

curl --request GET \
  --url https://www.anyfast.ai/kling/v1/videos/text2video/TASK_ID \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json'

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-master",
    "image": "https://example.com/frame.png",
    "prompt": "Snow begins to fall around the subject",
    "duration": "5",
    "mode": "pro",
    "watermark_info": {"enabled": false}
  }'

200

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

model_name · string · required

Must be kling-2.1-master.

image · string · required

Start-frame URL or raw Base64.

prompt · string

Positive prompt, up to 2,500 characters.

negative_prompt · string

Negative prompt, up to 2,500 characters.

mode · string · default: "std"

std for 720p or pro for 1080p.

duration · string · default: "5"

5 or 10 seconds.

watermark_info · 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.

Kling 2.1 Master does not support image_tail; provide only image.

Query task by ID

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

Request headers

Authorization · string · required

Bearer authentication in the form Bearer YOUR_API_KEY.

Content-Type · string · default: "application/json" · required

Data exchange format. Use application/json.

Path parameters

task_id · string · required

Image-to-video task ID returned by the create endpoint.

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'

Task result

data.task_status is submitted, processing, succeed, or failed. When the task succeeds, data.task_result.videos[] contains the temporary result url and actual duration.

code · integer

0 indicates that the query was accepted.

message · string

Error information; empty for a successful query.

data.task_id · string

Queried task ID.

data.task_status · string

submitted, processing, succeed, or failed.

data.task_status_msg · string

Failure details when the task fails.

data.task_result.videos · object[]

Generated videos, returned after success.

data.task_result.videos[].url · string

Temporary generated-video URL.

data.task_result.videos[].duration · string

Actual duration in seconds.

data.created_at · integer

Creation Unix timestamp in milliseconds.

data.updated_at · integer

Last update Unix timestamp in milliseconds.

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
  }
}

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

This Legacy model does not support an end frame, audio, specified voices, multi-shot, motion brush, camera control, or cfg_scale.