Use RunComfy's API to run bytedance/seedance-2.0-mini/video-to-video. For accepted inputs and outputs, see the model's schema.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/bytedance/seedance-2.0-mini/video-to-video \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "Transform the autumn forest into a deep winter snowscape: frosted evergreen trees, steady falling snow, frozen mist over the valley, cold blue morning light, and white steam billowing from the train into the frigid air. Keep the original camera move and the train motion intact, cinematic color grade.",
"video": "https://playgrounds-storage-public.runcomfy.net/tools/7376/media-files/input.mp4"
}'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/bytedance/seedance-2.0-mini/video-to-video \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "Transform the autumn forest into a deep winter snowscape: frosted evergreen trees, steady falling snow, frozen mist over the valley, cold blue morning light, and white steam billowing from the train into the frigid air. Keep the original camera move and the train motion intact, cinematic color grade.",
"video": "https://playgrounds-storage-public.runcomfy.net/tools/7376/media-files/input.mp4"
}'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"
],
"properties": {
"prompt": {
"title": "Prompt",
"description": "Describe the change you want applied to the source video, such as a new look, lighting, weather, or background.",
"type": "string",
"default": "Transform the autumn forest into a deep winter snowscape: frosted evergreen trees, steady falling snow, frozen mist over the valley, cold blue morning light, and white steam billowing from the train into the frigid air. Keep the original camera move and the train motion intact, cinematic color grade."
},
"video": {
"title": "Source Video URL",
"description": "Public URL of the video you want to edit. Clips longer than 15 seconds are trimmed to the first 15 seconds.",
"type": "string",
"default": "https://playgrounds-storage-public.runcomfy.net/tools/7376/media-files/input.mp4"
},
"reference_images": {
"title": "Reference Images",
"description": "Optional image URLs that steer subject identity, style, or visual direction for the edit.",
"type": "array",
"minItems": 0
},
"reference_audios": {
"title": "Reference Audios",
"description": "Optional audio URLs that guide the generated audio track.",
"type": "array",
"minItems": 0
},
"resolution": {
"title": "Resolution",
"description": "Output video resolution tier.",
"type": "string",
"enum": [
"480p",
"720p"
],
"default": "720p"
},
"aspect_ratio": {
"title": "Aspect Ratio",
"description": "Output aspect ratio. Leave on the default or pick a framing; the output adapts to the input when this is not set.",
"type": "string",
"enum": [
"16:9",
"9:16",
"4:3",
"3:4",
"1:1",
"21:9"
],
"default": "16:9"
},
"duration": {
"title": "Duration",
"description": "Length of the edited video in seconds. Auto-detected from the input video when left at the default.",
"type": "integer",
"minimum": 4,
"maximum": 15,
"default": 5
},
"generate_audio": {
"title": "Generate Audio",
"description": "Generate native audio for the edited output. Turn off to keep the input video's original audio track.",
"type": "boolean",
"default": true
},
"enable_web_search": {
"title": "Enable Web Search",
"description": "Allow the model to pull in real-time information when the prompt needs it.",
"type": "boolean",
"default": false
}
}
}{
"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.