Use RunComfy's API to run ltx/ltx-2/pro/image-to-video. For accepted inputs and outputs, see the model's schema.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/ltx/ltx-2/pro/image-to-video \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "A woman stands still amid a busy neon-lit street at night. The camera slowly dollies in toward her face as people blur past, their motion emphasizing her calm presence. ",
"image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7233/media-files/input-1-1.jpg"
}'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/ltx/ltx-2/pro/image-to-video \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "A woman stands still amid a busy neon-lit street at night. The camera slowly dollies in toward her face as people blur past, their motion emphasizing her calm presence. ",
"image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7233/media-files/input-1-1.jpg"
}'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",
"required": [
"prompt",
"image_url"
],
"properties": {
"image_url": {
"title": "Image",
"description": "Supported formats: jpg, jpeg, png, webp, gif, avif.",
"type": "string",
"default": "https://playgrounds-storage-public.runcomfy.net/tools/7233/media-files/input-1-1.jpg"
},
"prompt": {
"title": "Prompt",
"description": "The prompt to generate the video from.",
"type": "string",
"default": "A woman stands still amid a busy neon-lit street at night. The camera slowly dollies in toward her face as people blur past, their motion emphasizing her calm presence. "
},
"duration": {
"title": "Duration",
"description": "The duration of the generated video in seconds.",
"type": "integer",
"enum": [
6,
8,
10
],
"default": 6
},
"resolution": {
"title": "Resolution",
"description": "The resolution of the generated video.",
"type": "string",
"enum": [
"1080p",
"1440p",
"2160p"
],
"default": "1080p"
},
"aspect_ratio": {
"title": "Aspect Ratio (W:H)",
"description": "The aspect ratio of the generated video. Only 16:9 is supported.",
"type": "string",
"enum": [
"16:9"
],
"default": "16:9"
},
"fps": {
"title": "Frames Per Second",
"description": "The frames per second of the generated video.",
"type": "integer",
"enum": [
25,
50
],
"default": 25
},
"generate_audio": {
"title": "Generate Audio",
"description": "Whether to generate audio for the generated video.",
"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.