Use RunComfy's API to run kling/kling-2-6/pro/text-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-2-6/pro/text-to-video \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "A scene in Antarctica with towering ice formations, the overall tone being a cold, white, frigid color palette. The glacier cracks with a loud noise, followed by the sound of ice shattering, as the engines of the research team's snowmobiles roar. The camera follows the retreating research team and the collapsing ice towers."
}'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-2-6/pro/text-to-video \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "A scene in Antarctica with towering ice formations, the overall tone being a cold, white, frigid color palette. The glacier cracks with a loud noise, followed by the sound of ice shattering, as the engines of the research team's snowmobiles roar. The camera follows the retreating research team and the collapsing ice towers."
}'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"
],
"properties": {
"prompt": {
"title": "Prompt",
"description": "",
"type": "string",
"default": "A scene in Antarctica with towering ice formations, the overall tone being a cold, white, frigid color palette. The glacier cracks with a loud noise, followed by the sound of ice shattering, as the engines of the research team's snowmobiles roar. The camera follows the retreating research team and the collapsing ice towers."
},
"duration": {
"title": "Duration",
"description": "The duration of the generated video in seconds.",
"type": "integer",
"enum": [
5,
10
],
"default": 5
},
"aspect_ratio": {
"title": "Aspect Ratio (W:H)",
"description": "The aspect ratio of the generated video frame.",
"type": "string",
"enum": [
"16:9",
"9:16",
"1:1"
],
"default": "16:9"
},
"negative_prompt": {
"title": "Negative Prompt",
"description": "Items or qualities to be excluded from the generation (negative prompt).",
"type": "string",
"default": "blur, distort, and low quality"
},
"generate_audio": {
"title": "Generate Audio",
"description": "Whether to generate native audio for the video. Supports Chinese and English voice output; other languages are automatically translated to English. For English speech, use lowercase letters; for acronyms or proper nouns, use uppercase.",
"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.