Happyhorse HappyHorse 1.0 I2V API | Pricing & Docs

happyhorse/happyhorse-1.0/image-to-video

HappyHorse 1.0 I2V is live on RunComfy via Alibaba. Animate any uploaded photo into 3–15s 720P or 1080P video — the model keeps faces, products, and composition stable while adding cinematic motion.

1. Get started

Use RunComfy's API to run happyhorse/happyhorse-1.0/image-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/image-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7345/media-files/ref-promo.webp",
    "prompt": "Slow cinematic camera drift around the subject, soft natural motion, identity-stable face and clothing, gentle wind moving hair, premium photoreal look."
  }'

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/happyhorse/happyhorse-1.0/image-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7345/media-files/ref-promo.webp",
    "prompt": "Slow cinematic camera drift around the subject, soft natural motion, identity-stable face and clothing, gentle wind moving hair, premium photoreal look."
  }'

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 schema",
  "required": [
    "image_url",
    "prompt"
  ],
  "properties": {
    "image_url": {
      "title": "First Frame Image",
      "description": "Source image to animate (first frame). Formats: JPEG, JPG, PNG, or WEBP. Min 300px per side; aspect between 1:2.5 and 2.5:1; max 10MB.",
      "type": "string",
      "default": "https://playgrounds-storage-public.runcomfy.net/tools/7345/media-files/ref-promo.webp"
    },
    "prompt": {
      "title": "Prompt",
      "description": "Describe the motion, camera, lighting, and atmosphere. Up to 5000 non-Chinese characters or 2500 Chinese characters (longer input is truncated).",
      "type": "string",
      "default": "Slow cinematic camera drift around the subject, soft natural motion, identity-stable face and clothing, gentle wind moving hair, premium photoreal look.",
      "maxLength": 5000
    },
    "resolution": {
      "title": "Resolution",
      "description": "Output video resolution. HappyHorse 1.0 I2V 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 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"
        }
      }
    }
  }
}

RunComfy

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.

1. Get started

Use RunComfy's API to run happyhorse/happyhorse-1.0/image-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/image-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7345/media-files/ref-promo.webp",
    "prompt": "Slow cinematic camera drift around the subject, soft natural motion, identity-stable face and clothing, gentle wind moving hair, premium photoreal look."
  }'

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/happyhorse/happyhorse-1.0/image-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7345/media-files/ref-promo.webp",
    "prompt": "Slow cinematic camera drift around the subject, soft natural motion, identity-stable face and clothing, gentle wind moving hair, premium photoreal look."
  }'

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)

5. Schema

Input schema

{
  "type": "object",
  "title": "Input schema",
  "required": [
    "image_url",
    "prompt"
  ],
  "properties": {
    "image_url": {
      "title": "First Frame Image",
      "description": "Source image to animate (first frame). Formats: JPEG, JPG, PNG, or WEBP. Min 300px per side; aspect between 1:2.5 and 2.5:1; max 10MB.",
      "type": "string",
      "default": "https://playgrounds-storage-public.runcomfy.net/tools/7345/media-files/ref-promo.webp"
    },
    "prompt": {
      "title": "Prompt",
      "description": "Describe the motion, camera, lighting, and atmosphere. Up to 5000 non-Chinese characters or 2500 Chinese characters (longer input is truncated).",
      "type": "string",
      "default": "Slow cinematic camera drift around the subject, soft natural motion, identity-stable face and clothing, gentle wind moving hair, premium photoreal look.",
      "maxLength": 5000
    },
    "resolution": {
      "title": "Resolution",
      "description": "Output video resolution. HappyHorse 1.0 I2V 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 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"
        }
      }
    }
  }
}

HappyHorse 1.0 I2V is live on RunComfy via Alibaba. Animate any uploaded photo into 3–15s 720P or 1080P video — the model keeps faces, products, and composition stable while adding cinematic motion.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

HappyHorse 1.0 I2V is live on RunComfy via Alibaba. Animate any uploaded photo into 3–15s 720P or 1080P video — the model keeps faces, products, and composition stable while adding cinematic motion.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

HappyHorse 1.0 I2V: #1 Arena-Ranked Image-to-Video AI Model | RunComfy

HappyHorse 1.0 I2V is live on RunComfy via Alibaba. Animate any uploaded photo into 3–15s 720P or 1080P video — the model keeps faces, products, and composition stable while adding cinematic motion.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

HappyHorse 1.0 I2V: #1 Arena-Ranked Image-to-Video AI Model | RunComfy

HappyHorse 1.0 I2V is live on RunComfy via Alibaba. Animate any uploaded photo into 3–15s 720P or 1080P video — the model keeps faces, products, and composition stable while adding cinematic motion.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema