Use RunComfy's API to run kling/kling-v4/video-edit. For accepted inputs and outputs, see the model's schema.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/kling/kling-v4/video-edit \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "",
"video_url": ""
}'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.
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-v4/video-edit \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "",
"video_url": ""
}'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 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 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>"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.
{
"type": "object",
"title": "Input schema",
"required": [
"prompt",
"video_url"
],
"properties": {
"prompt": {
"title": "Prompt",
"description": "Describe the change. Call the source @Video1, extra videos @Video2, images @Image1, and subjects @Element1.",
"type": "string",
"examples": [
"Edit @Video1. Change only the white teapot into a glossy cherry-red enamel teapot of the same shape. Keep the cup, the saucer, the table, the coat, the light, and the camera. Audio: quiet room tone, no music."
]
},
"video_url": {
"title": "Video URL",
"description": "Source video to edit, 3-30 seconds. Addressed as @Video1. Longer clips are limited to the first 30 seconds.",
"type": "string",
"examples": [
"https://playgrounds-storage-public.runcomfy.net/tools/7480/media-files/promo-source.mp4"
]
},
"image_urls": {
"title": "Image URLs",
"description": "Optional reference images, up to ten, addressed as @Image1.",
"type": "array",
"maxItems": 10,
"items": {
"type": "string",
"format": "image_uri"
}
},
"video_urls": {
"title": "Video URLs",
"description": "Optional extra videos, up to four, addressed from @Video2. Counted with the source and video subjects toward 30 seconds.",
"type": "array",
"maxItems": 4,
"items": {
"type": "string",
"format": "video_uri"
}
},
"elements": {
"title": "Elements",
"description": "Up to seven saved subjects. Each one is a front view plus optional angles, or a single 3-8 second video. At most three may be videos. Refer to them as @Element1, @Element2, and so on.",
"type": "array",
"items": {
"type": "object",
"properties": {
"frontal_image_url": {
"type": "string",
"format": "image_uri",
"description": "Front view of the subject. Use this with up to three extra angles, or use a video instead."
},
"reference_image_urls": {
"type": "array",
"format": "image_uris",
"maxItems": 3,
"items": {
"type": "string",
"format": "image_uri"
},
"description": "Up to three extra angles. Requires a front view, and cannot be combined with a video."
},
"video_url": {
"type": "string",
"format": "video_uri",
"description": "One 3-8 second clip of the subject, used instead of images. At most three elements may be videos."
}
}
},
"minItems": 0,
"maxItems": 7
},
"duration": {
"title": "Duration",
"description": "Output length in whole seconds. Leave this empty and the clip follows the source video, from 3 to 30 seconds.",
"type": "integer",
"minimum": 3,
"maximum": 30
},
"resolution": {
"title": "Resolution",
"description": "Output resolution. 1080p is the default. 720p is the lighter pass.",
"type": "string",
"enum": [
"720p",
"1080p"
],
"default": "1080p"
}
}
}{
"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 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.