Kling Kling Video O3 Standard Reference to Video API | Pricing & Docs

kling/kling-video-o3/standard/reference-to-video

Combine reference images, an optional reference video, and a prompt into a 3-15s clip with consistent characters using Kling Video O3 Standard Reference to Video, on RunComfy models and HTTP API.

1. Get started

Use RunComfy's API to run kling/kling-video-o3/standard/reference-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-video-o3/standard/reference-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "The woman in Figure 1 and the man in Figure 2 stroll along a Parisian boulevard at night, glowing classic street lamps and softly lit Haussmann-style facades behind them, slow tracking shot, cinematic warm lighting, photoreal detail."
  }'

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-video-o3/standard/reference-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "The woman in Figure 1 and the man in Figure 2 stroll along a Parisian boulevard at night, glowing classic street lamps and softly lit Haussmann-style facades behind them, slow tracking shot, cinematic warm lighting, photoreal detail."
  }'

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 schema",
  "required": [
    "prompt"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "Describe the scene and action. Refer to references by position, e.g. 'The man in Figure 2 walks with the woman in Figure 1 through a sunlit park.'",
      "type": "string",
      "default": "The woman in Figure 1 and the man in Figure 2 stroll along a Parisian boulevard at night, glowing classic street lamps and softly lit Haussmann-style facades behind them, slow tracking shot, cinematic warm lighting, photoreal detail."
    },
    "images": {
      "title": "Reference Images",
      "description": "Reference images of characters, props, or styles. Up to 7 without a reference video, or up to 4 when a reference video is provided.",
      "type": "array",
      "maxItems": 7,
      "minItems": 0,
      "default": [
        "https://playgrounds-storage-public.runcomfy.net/tools/7361/media-files/refs/ref_woman_euro.png",
        "https://playgrounds-storage-public.runcomfy.net/tools/7361/media-files/refs/ref_man_euro.png"
      ]
    },
    "video": {
      "title": "Reference Video URL",
      "description": "Optional reference video for motion guidance, style transfer, or scene continuity. When provided, billing switches to the with-reference-video tier.",
      "type": "string"
    },
    "aspect_ratio": {
      "title": "Aspect Ratio (W:H)",
      "description": "Output frame ratio. 16:9 for landscape, 9:16 for vertical social, 1:1 for square.",
      "type": "string",
      "enum": [
        "16:9",
        "9:16",
        "1:1"
      ],
      "default": "16:9"
    },
    "duration": {
      "title": "Duration (seconds)",
      "description": "Length of the generated clip in seconds (3-15).",
      "type": "integer",
      "minimum": 3,
      "maximum": 15,
      "default": 5
    },
    "sound": {
      "title": "Generate Sound",
      "description": "When enabled, synthesize synchronized audio with the video. Adds ~33% to the per-second cost (no effect when a reference video is provided).",
      "type": "boolean",
      "default": false
    },
    "keep_original_sound": {
      "title": "Keep Original Sound",
      "description": "When a reference video is provided, retain its original audio track in the generated output.",
      "type": "boolean",
      "default": true
    },
    "shot_type": {
      "title": "Shot Type",
      "description": "Editing scope. Use intelligent for auto-decided pacing and cuts, or customize for prompt-driven manual control.",
      "type": "string",
      "enum": [
        "customize",
        "intelligent"
      ],
      "default": "customize"
    }
  }
}

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"
        }
      }
    }
  }
}

RunComfy

RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.

1. Get started

Use RunComfy's API to run kling/kling-video-o3/standard/reference-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-video-o3/standard/reference-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "The woman in Figure 1 and the man in Figure 2 stroll along a Parisian boulevard at night, glowing classic street lamps and softly lit Haussmann-style facades behind them, slow tracking shot, cinematic warm lighting, photoreal detail."
  }'

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-video-o3/standard/reference-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "The woman in Figure 1 and the man in Figure 2 stroll along a Parisian boulevard at night, glowing classic street lamps and softly lit Haussmann-style facades behind them, slow tracking shot, cinematic warm lighting, photoreal detail."
  }'

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)

5. Schema

Input schema

{
  "type": "object",
  "title": "Input schema",
  "required": [
    "prompt"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "Describe the scene and action. Refer to references by position, e.g. 'The man in Figure 2 walks with the woman in Figure 1 through a sunlit park.'",
      "type": "string",
      "default": "The woman in Figure 1 and the man in Figure 2 stroll along a Parisian boulevard at night, glowing classic street lamps and softly lit Haussmann-style facades behind them, slow tracking shot, cinematic warm lighting, photoreal detail."
    },
    "images": {
      "title": "Reference Images",
      "description": "Reference images of characters, props, or styles. Up to 7 without a reference video, or up to 4 when a reference video is provided.",
      "type": "array",
      "maxItems": 7,
      "minItems": 0,
      "default": [
        "https://playgrounds-storage-public.runcomfy.net/tools/7361/media-files/refs/ref_woman_euro.png",
        "https://playgrounds-storage-public.runcomfy.net/tools/7361/media-files/refs/ref_man_euro.png"
      ]
    },
    "video": {
      "title": "Reference Video URL",
      "description": "Optional reference video for motion guidance, style transfer, or scene continuity. When provided, billing switches to the with-reference-video tier.",
      "type": "string"
    },
    "aspect_ratio": {
      "title": "Aspect Ratio (W:H)",
      "description": "Output frame ratio. 16:9 for landscape, 9:16 for vertical social, 1:1 for square.",
      "type": "string",
      "enum": [
        "16:9",
        "9:16",
        "1:1"
      ],
      "default": "16:9"
    },
    "duration": {
      "title": "Duration (seconds)",
      "description": "Length of the generated clip in seconds (3-15).",
      "type": "integer",
      "minimum": 3,
      "maximum": 15,
      "default": 5
    },
    "sound": {
      "title": "Generate Sound",
      "description": "When enabled, synthesize synchronized audio with the video. Adds ~33% to the per-second cost (no effect when a reference video is provided).",
      "type": "boolean",
      "default": false
    },
    "keep_original_sound": {
      "title": "Keep Original Sound",
      "description": "When a reference video is provided, retain its original audio track in the generated output.",
      "type": "boolean",
      "default": true
    },
    "shot_type": {
      "title": "Shot Type",
      "description": "Editing scope. Use intelligent for auto-decided pacing and cuts, or customize for prompt-driven manual control.",
      "type": "string",
      "enum": [
        "customize",
        "intelligent"
      ],
      "default": "customize"
    }
  }
}

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"
        }
      }
    }
  }
}

Combine reference images, an optional reference video, and a prompt into a 3-15s clip with consistent characters using Kling Video O3 Standard Reference to Video, on RunComfy models and HTTP API.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

Combine reference images, an optional reference video, and a prompt into a 3-15s clip with consistent characters using Kling Video O3 Standard Reference to Video, on RunComfy models and HTTP API.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

Kling Video O3 Standard Reference to Video: Character-Consistent Video Generation on Models and API | RunComfy

Combine reference images, an optional reference video, and a prompt into a 3-15s clip with consistent characters using Kling Video O3 Standard Reference to Video, on RunComfy models and HTTP API.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

Kling Video O3 Standard Reference to Video: Character-Consistent Video Generation on Models and API | RunComfy

Combine reference images, an optional reference video, and a prompt into a 3-15s clip with consistent characters using Kling Video O3 Standard Reference to Video, on RunComfy models and HTTP API.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema