Kling Video O3: Cinematic Text-to-Video With Optional Sound on Models and API | RunComfy

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/kling/kling-video-o3/standard/text-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "Cinematic wide shot of a lone astronaut walking across a glowing crystal canyon at dusk, slow tracking dolly, volumetric god rays, photoreal detail."
  }'

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

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

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

{
  "type": "object",
  "title": "modelApiDoc_navInputSchema",
  "required": [
    "prompt"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "Text description of the scene, subject, motion, camera, and atmosphere to generate.",
      "type": "string",
      "default": "Cinematic wide shot of a lone astronaut walking across a glowing crystal canyon at dusk, slow tracking dolly, volumetric god rays, photoreal detail."
    },
    "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 sound alongside the video. Adds ~33% to the per-second cost.",
      "type": "boolean",
      "default": false
    },
    "shot_type": {
      "title": "Shot Type",
      "description": "Editing scope. Use intelligent to let the model auto-decide cuts and pacing, or customize for manual prompt-driven control.",
      "type": "string",
      "enum": [
        "customize",
        "intelligent"
      ],
      "default": "customize"
    },
    "multi_prompt": {
      "title": "Multi Prompt",
      "description": "Additional prompt segments to guide scene transitions and progressions. The sum of durations in multi_prompt must equal to total video duration.",
      "type": "array",
      "items": {
        "prompt": {
          "title": "Prompt",
          "description": "Additional prompt segment to guide a scene transition or progression.",
          "type": "string",
          "format": "str"
        },
        "duration": {
          "title": "Duration",
          "description": "Duration of the prompt segment in seconds.",
          "type": "integer",
          "format": "int_slider_with_range",
          "minimum": 3,
          "maximum": 15,
          "default": 5
        }
      },
      "maxItems": 20,
      "minItems": 0
    }
  }
}