---
title: "happy-horse-1-image-to-video-720p (balanced)"
method: POST
path: "/api/v1/happy-horse-1-image-to-video-720p"
tags: ["Video: Image-to-Video"]
---

# happy-horse-1-image-to-video-720p (balanced)

`POST /api/v1/happy-horse-1-image-to-video-720p`

## Request

- Base URL: `https://api.muapi.ai`
- URL: `https://api.muapi.ai/api/v1/happy-horse-1-image-to-video-720p`
- Auth: one of:
  - API key in header `x-api-key`
  - OAuth 2 (client credentials, token URL `https://api.muapi.ai/oauth/token`)

Animate a still image to 720p video using Happy Horse 1 (cheaper resolution tier). Input: images_list (exactly 1 image — the start frame), optional prompt. Output: 720p video. Use for: cost-effective cinematic animation.

## Query parameters

- `webhook` string
- `team_id` integer, nullable

## Headers

- `x-api-key` string
- `x-embed-code` string, nullable
- `x-agent-embed-code` string, nullable
- `x-whitelabel-studio` string, nullable
- `authorization` string, nullable

## Request body

- HappyHorse1I2VRequest
  - `prompt` string: Optional text prompt guiding the motion.
  - `webhook_url` string, uri, nullable
  - `aspect_ratio` '16:9' | '9:16' | '1:1' | '4:3' | '3:4'
  - `duration` integer: Video duration in seconds (3–15).
  - `resolution` '720p' | '1080p': Output resolution. Price scales with resolution — see the model's pricing table.
  - `images_list` string[], required: Start frame image URL (single-element list). The video will animate from this image.

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/muapi/apis/muapi-api.md) · [All operations](https://skmtc.dev/muapi/apis/muapi-api/llms.txt) · [OpenAPI document](https://skmtc.dev/muapi/apis/muapi-api/revisions/e4b7374381e5?raw)