Kling 2.1 - Unifically

Generate high-quality AI videos using Kling 2.1 with flexible generation modes.

Models

Model	Mode	Features
`kuaishou/kling-2.1-video`	`std`, `pro`	Image-to-video only, end frame supported
`kuaishou/kling-2.1-master-video`	`pro` only	Text-to-video + image-to-video, no end frame

Kling 2.1

Image-to-video only — start_frame_url is required.

Parameters

Parameter	Type	Required	Default	Description
`prompt`	string	Yes	-	Text prompt describing the video to generate
`start_frame_url`	string	Yes	-	First frame image URL
`end_frame_url`	string	No	-	Last frame image URL
`duration`	integer	No	`5`	`5` or `10` seconds
`mode`	string	No	`"pro"`	`"std"` (720p) or `"pro"` (1080p)
`sound_effects`	object	No	-	Sound effects and music configuration. Omit to disable audio
`nsfw_check`	boolean	No	`true`	Check uploaded media inputs for NSFW content

Example

curl -X POST https://api.unifically.com/v1/tasks \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "kuaishou/kling-2.1-video",
    "input": {
      "prompt": "A butterfly landing on a flower in slow motion",
      "start_frame_url": "https://example.com/butterfly.jpg",
      "duration": 5,
      "mode": "pro"
    }
  }'

Kling 2.1 Master

Supports both text-to-video and image-to-video. Pro-only mode. No end frame support.

Parameters

Parameter	Type	Required	Default	Description
`prompt`	string	Yes	-	Text prompt describing the video to generate
`duration`	integer	No	`5`	`5` or `10` seconds
`start_frame_url`	string	No	-	First frame image URL (optional)
`sound_effects`	object	No	-	Sound effects and music configuration. Omit to disable audio
`nsfw_check`	boolean	No	`true`	Check uploaded media inputs for NSFW content

Example - Text-to-Video

curl -X POST https://api.unifically.com/v1/tasks \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "kuaishou/kling-2.1-master-video",
    "input": {
      "prompt": "Cinematic scene with dramatic lighting",
      "duration": 10,
      "sound_effects": {
        "music": "cinematic orchestral"
      }
    }
  }'

Example - Image-to-Video

curl -X POST https://api.unifically.com/v1/tasks \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "kuaishou/kling-2.1-master-video",
    "input": {
      "prompt": "Cinematic scene with dramatic lighting",
      "start_frame_url": "https://example.com/start.jpg",
      "duration": 10
    }
  }'

Sound Effects

Parameter	Type	Default	Description
`sound`	string	`""`	Sound effect prompt (e.g. “wind blowing, birds chirping”)
`music`	string	`""`	Background music prompt (e.g. “cinematic orchestral”)
`asmr_mode`	boolean	`false`	Enable ASMR-style audio generation

Response

{
  "code": 200,
  "success": true,
  "data": {
    "task_id": "abc123def456",
    "status": "processing"
  }
}

Volume discounts are available for almost all models. Reach out at contact@unifically.com to discuss custom pricing.