Kling O1: Cinematic Image-to-Video Playground & API | RunComfy
kling/kling-video-o1/image-to-video
Kuaishou's Kling O1 transforms images into dynamic videos with support for start and end frames, offering industry-leading motion consistency and realism.
Table of contents
1. Get started
Use RunComfy's API to run kling/kling-video-o1/image-to-video. For accepted inputs and outputs, see the model's schema.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/kling/kling-video-o1/image-to-video \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "The girl is walking on the street",
"start_image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7243/media-files/input-1-1.png",
"end_image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7243/media-files/input-1-2.png"
}'2. Authentication
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.
3. API reference
Submit a request
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-video-o1/image-to-video \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "The girl is walking on the street",
"start_image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7243/media-files/input-1-1.png",
"end_image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7243/media-files/input-1-2.png"
}'Monitor request status
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 request results
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 request
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>"4. File inputs
Hosted file (URL)
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.
5. Schema
Input schema
{
"type": "object",
"title": "Input",
"required": [
"prompt",
"start_image_url",
"end_image_url"
],
"properties": {
"prompt": {
"title": "Prompt",
"description": "Use @Image1 to reference the start frame, @Image2 to reference the end frame.",
"type": "string",
"default": "The girl is walking on the street"
},
"start_image_url": {
"title": "Start Image",
"description": "Image to use as the first frame of the video. Accepted file types: jpg, jpeg, png, webp, gif, avif.",
"type": "string",
"default": "https://playgrounds-storage-public.runcomfy.net/tools/7243/media-files/input-1-1.png",
"validations": [
{
"validation_rule": "file_size_mb<",
"validation_value": 10,
"validation_error": "File size must be less than 10 MB."
},
{
"validation_rule": "width_pixels>",
"validation_value": 300,
"validation_error": "The uploaded image width and height must exceed 300 pixels."
},
{
"validation_rule": "height_pixels>",
"validation_value": 300,
"validation_error": "The uploaded image width and height must exceed 300 pixels."
},
{
"validation_rule": "width/height>",
"validation_value": 0.4,
"validation_error": "The aspect ratio range should be between 0.40 and 2.50."
},
{
"validation_rule": "width/height<",
"validation_value": 2.5,
"validation_error": "The aspect ratio range should be between 0.40 and 2.50."
}
]
},
"end_image_url": {
"title": "End Image",
"description": "Image to use as the last frame of the video. Accepted file types: jpg, jpeg, png, webp, gif, avif.",
"type": "string",
"default": "https://playgrounds-storage-public.runcomfy.net/tools/7243/media-files/input-1-2.png",
"validations": [
{
"validation_rule": "file_size_mb<",
"validation_value": 10,
"validation_error": "File size must be less than 10 MB."
},
{
"validation_rule": "width_pixels>",
"validation_value": 300,
"validation_error": "The uploaded image width and height must exceed 300 pixels."
},
{
"validation_rule": "height_pixels>",
"validation_value": 300,
"validation_error": "The uploaded image width and height must exceed 300 pixels."
},
{
"validation_rule": "width/height>",
"validation_value": 0.4,
"validation_error": "The aspect ratio range should be between 0.40 and 2.50."
},
{
"validation_rule": "width/height<",
"validation_value": 2.5,
"validation_error": "The aspect ratio range should be between 0.40 and 2.50."
}
]
},
"duration": {
"title": "Duration",
"description": "Video duration in seconds.",
"type": "integer",
"enum": [
5,
10
],
"default": 5
}
}
}Output schema
{
"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" }
}
}
}
}