Kling Kling 2.6 Pro API | Pricing & Docs

kling/kling-2-6/pro/image-to-video

Transform images into cinematic videos with synchronized sound, lifelike motion, and expressive voices, delivering fast, high-fidelity storytelling for creators, marketers, and developers.

1. Get started

Use RunComfy's API to run kling/kling-2-6/pro/image-to-video. For accepted inputs and outputs, see the model's schema.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/kling/kling-2-6/pro/image-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "In a bright rehearsal room, sunlight streams through the window, and a standing microphone is placed in the center of the room. [Campus band female lead singer] stands in front of the microphone with her eyes closed, while the other members stand around her. [Campus band female lead singer, full voice] leads: 'I will try to fix you, with all my heart and soul...' The background is an a cappella harmony, and the camera slowly circles around the band members.",
    "image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7261/media-files/input-1-1.webp"
  }'

2. Authentication

Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.

3. API reference

Submit a request

Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/kling/kling-2-6/pro/image-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "In a bright rehearsal room, sunlight streams through the window, and a standing microphone is placed in the center of the room. [Campus band female lead singer] stands in front of the microphone with her eyes closed, while the other members stand around her. [Campus band female lead singer, full voice] leads: 'I will try to fix you, with all my heart and soul...' The background is an a cappella harmony, and the camera slowly circles around the band members.",
    "image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7261/media-files/input-1-1.webp"
  }'

Monitor request status

Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
  --header "Authorization: Bearer <token>"

Retrieve request results

Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
  --header "Authorization: Bearer <token>"

Cancel a request

Cancel a queued job by request_id, in-progress jobs cannot be cancelled.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
  --header "Authorization: Bearer <token>"

4. File inputs

Hosted file (URL)

Provide a publicly reachable HTTPS URL. Ensure the host allows server‑side fetches (no login/cookies required) and isn't rate‑limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre‑signed URLs for private assets.

5. Schema

Input schema

{
  "type": "object",
  "title": "Input",
  "required": [
    "prompt",
    "image_url"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "",
      "type": "string",
      "default": "In a bright rehearsal room, sunlight streams through the window, and a standing microphone is placed in the center of the room. [Campus band female lead singer] stands in front of the microphone with her eyes closed, while the other members stand around her. [Campus band female lead singer, full voice] leads: 'I will try to fix you, with all my heart and soul...' The background is an a cappella harmony, and the camera slowly circles around the band members."
    },
    "image_url": {
      "title": "Image",
      "description": "URL of the image to be used for the video. Accepted file types: jpg, jpeg, png, webp, gif, avif",
      "type": "string",
      "default": "https://playgrounds-storage-public.runcomfy.net/tools/7261/media-files/input-1-1.webp"
    },
    "duration": {
      "title": "Duration",
      "description": "The duration of the generated video in seconds.",
      "type": "integer",
      "enum": [
        5,
        10
      ],
      "default": 5
    },
    "negative_prompt": {
      "title": "Negative Prompt",
      "description": "A negative prompt to exclude undesired qualities (e.g., blur, distortion, low quality).",
      "type": "string",
      "default": "blur, distort, and low quality"
    },
    "generate_audio": {
      "title": "Generate Audio",
      "description": "Whether to generate native audio for the video. Supports Chinese and English voice output. Other languages are automatically translated to English. For English speech, use lowercase letters; for acronyms or proper nouns, use uppercase.",
      "type": "boolean",
      "default": true
    }
  }
}

Output schema

{
  "output": {
    "type": "object",
    "properties": {
      "image": {
        "type": "string",
        "format": "uri",
        "description": "single image URL"
      },
      "video": {
        "type": "string",
        "format": "uri",
        "description": "single video URL"
      },
      "images": {
        "type": "array",
        "description": "multiple image URLs",
        "items": { "type": "string", "format": "uri" }
      },
      "videos": {
        "type": "array",
        "description": "multiple video URLs",
        "items": { "type": "string", "format": "uri" }
      }
    }
  }
}

Kling 2.6 Pro: Realistic Image-to-Video with Sound Sync on playground and API | RunComfy