Use RunComfy's API to run bytedance/seedance-2.5/image-to-video/4k. For accepted inputs and outputs, see the model's schema.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/bytedance/seedance-2.5/image-to-video/4k \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "A chilled glass bottle on a dark studio surface comes alive: one condensation droplet traces slowly down the side, frost blooming across the glass, cool rim light raking the edge while a soft key fills the label, gentle push-in with a subtle rack focus onto the embossed lettering, quiet room tone, no text, no watermark.",
"image": "https://playgrounds-storage-public.runcomfy.net/tools/7449/media-files/input-1-1.png"
}'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-2.5/image-to-video/4k \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "A chilled glass bottle on a dark studio surface comes alive: one condensation droplet traces slowly down the side, frost blooming across the glass, cool rim light raking the edge while a soft key fills the label, gentle push-in with a subtle rack focus onto the embossed lettering, quiet room tone, no text, no watermark.",
"image": "https://playgrounds-storage-public.runcomfy.net/tools/7449/media-files/input-1-1.png"
}'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",
"image"
],
"properties": {
"prompt": {
"title": "Prompt",
"description": "Text prompt describing the desired motion and style.",
"type": "string",
"default": "A chilled glass bottle on a dark studio surface comes alive: one condensation droplet traces slowly down the side, frost blooming across the glass, cool rim light raking the edge while a soft key fills the label, gentle push-in with a subtle rack focus onto the embossed lettering, quiet room tone, no text, no watermark."
},
"image": {
"title": "Image",
"description": "Input image that will be animated into a video.",
"type": "string",
"default": "https://playgrounds-storage-public.runcomfy.net/tools/7449/media-files/input-1-1.png"
},
"duration": {
"title": "Duration (seconds)",
"description": "The duration of the generated video in seconds. Default is 5. Range is 4–30.",
"type": "integer",
"minimum": 4,
"maximum": 30,
"default": 5
},
"generate_audio": {
"title": "Generate Audio",
"description": "When true, the model outputs video with synchronized audio (speech, SFX, music).",
"type": "boolean",
"default": true
}
}
}{
"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.