# HappyHorse 1.0 API on Opennan

> HappyHorse 1.0 API on Opennan: $0.104/s at 720p, 25% below Alibaba's official $0.14/s.

- Maker: Alibaba
- Category: Video
- Model id: `happyhorse-1`
- Endpoint: POST https://api.opennan.com/v1/videos/generations
- MCP: https://api.opennan.com/v1/mcp (generate_video)
- Page: https://opennan.com/models/happyhorse-1

## HappyHorse 1.0 API prices

| Tier | Opennan | Official | Below official |
| --- | --- | --- | --- |
| 720p, Standard | $0.104/s ($0.52 for 5 s) | $0.14/s | 25% below |
| 1080p, Standard | $0.208/s ($1.04 for 5 s) | $0.24/s | 13% below |

Official is the model maker's own list price for the same tier. Where the maker publishes a price, we never sell above it, most tiers at least 10% below.

## Call HappyHorse 1.0 from code

```bash
curl https://api.opennan.com/v1/videos/generations \
  -H "Authorization: Bearer $OPENNAN_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"happyhorse-1","prompt":"Rain on a neon street at night, slow push-in","reference_images":["https://example.com/start-frame.png"],"duration":5,"quality":"720p","aspect_ratio":"16:9"}'

# Then poll until "status" is "succeeded" or "failed":
curl https://api.opennan.com/v1/tasks/<task id> -H "Authorization: Bearer $OPENNAN_KEY"
```

## HappyHorse 1.0 API questions

### How much does the HappyHorse 1.0 API cost?

HappyHorse 1.0 API on Opennan: $0.104/s at 720p, 25% below Alibaba's official $0.14/s. Prices are in US dollars per call, shown before you run, and every tier is in the price table.

### How does that compare with the official price?

Alibaba lists $0.14/s; Opennan charges $0.104/s, 25% below. We only sell a tier below the maker's official price, most tiers at least 10% below.

### What inputs does HappyHorse 1.0 take?

Reference images.

### Which options can a call set?

Lengths: 5, 10 seconds. Resolutions: 720p, 1080p. Aspect ratios: 16:9, 9:16, 1:1, 4:3, 3:4, 21:9, 9:21.

### How is it billed?

Per video: the price depends on resolution, length and sound, and is shown before the call.

### What happens if a generation fails?

A failed task is refunded in full. You pay only for results.

### How do I call HappyHorse 1.0 from an AI agent?

Add the MCP server https://api.opennan.com/v1/mcp with your API key as a bearer token, then call the generate_video tool with model "happyhorse-1". Or send a POST to https://api.opennan.com/v1/videos/generations.

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