Use RunComfy's API to run happyhorse/happyhorse-1.0/text-to-video. For accepted inputs and outputs, see the model's schema.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/happyhorse/happyhorse-1.0/text-to-video \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "Wide shot. A lone astronaut in a dusty orange pressure suit with dark blue-gray harness straps and black boots skis across a vast lunar plain, leaving two long parallel tracks in the gray regolith behind. The astronaut is mid-stride, poles planted, pushing forward in 1/6th gravity, each push sending the body drifting slightly upward before settling back. Fine dust hangs in a low haze along the ski tracks. Behind and above, a crescent Earth sits just over the soft curve of the lunar horizon, blue-white atmospheric glow against total black sky. Raw sunlight, crushed shadows, no fill. 8K photorealistic. No logos on the suit."
}'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/happyhorse/happyhorse-1.0/text-to-video \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "Wide shot. A lone astronaut in a dusty orange pressure suit with dark blue-gray harness straps and black boots skis across a vast lunar plain, leaving two long parallel tracks in the gray regolith behind. The astronaut is mid-stride, poles planted, pushing forward in 1/6th gravity, each push sending the body drifting slightly upward before settling back. Fine dust hangs in a low haze along the ski tracks. Behind and above, a crescent Earth sits just over the soft curve of the lunar horizon, blue-white atmospheric glow against total black sky. Raw sunlight, crushed shadows, no fill. 8K photorealistic. No logos on the suit."
}'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": "Describe the scene, subject motion, camera, lighting, and any audio you want implied in the generated video. Max 2500 characters.",
"type": "string",
"default": "Wide shot. A lone astronaut in a dusty orange pressure suit with dark blue-gray harness straps and black boots skis across a vast lunar plain, leaving two long parallel tracks in the gray regolith behind. The astronaut is mid-stride, poles planted, pushing forward in 1/6th gravity, each push sending the body drifting slightly upward before settling back. Fine dust hangs in a low haze along the ski tracks. Behind and above, a crescent Earth sits just over the soft curve of the lunar horizon, blue-white atmospheric glow against total black sky. Raw sunlight, crushed shadows, no fill. 8K photorealistic. No logos on the suit.",
"maxLength": 2500
},
"aspect_ratio": {
"title": "Aspect Ratio (W:H)",
"description": "Output video aspect ratio.",
"type": "string",
"enum": [
"16:9",
"9:16",
"1:1",
"4:3",
"3:4"
],
"default": "16:9"
},
"resolution": {
"title": "Resolution",
"description": "Output video resolution. HappyHorse supports 720P or 1080P.",
"type": "string",
"enum": [
"720P",
"1080P"
],
"default": "1080P"
},
"duration": {
"title": "Duration",
"description": "Output video duration in seconds. Allowed values: 3–15.",
"type": "integer",
"enum": [
3,
4,
5,
6,
7,
8,
9,
10,
11,
12,
13,
14,
15
],
"default": 5
},
"seed": {
"title": "Seed",
"description": "Optional seed for reproducible generations. Use 0 to let the provider randomize.",
"type": "integer",
"minimum": 0,
"maximum": 2147483647,
"default": 0
},
"watermark": {
"title": "Watermark",
"description": "Whether to keep the provider watermark on the generated video.",
"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.