# MiniMax H3 Styles (video)

> MiniMax H3 Styles makes video with sound in one of five fixed looks: VHS tape, 1970s hand-painted toon, low-poly 3D, hand-drawn animation or 16-bit pixel art. It renders at 768p, in any whole length from 5 to 15 seconds.

Status: roasOS API v1.1. Catalog `model-catalog@2026-10-06.v5`, pricing `customer-pricing@2026-11-05.v15`. The endpoint `POST /v1/video/h3-max-style` is live. `POST /v1/generations` stays for one minor version as a deprecated alias (see "Today").

## Endpoint
POST https://api.roasos.com/v1/video/h3-max-style
Auth: Authorization: Bearer roasos_sk_… (scope api:write). Idempotency-Key required. quote_only / quote_id / webhook_url as in https://docs.roasos.com/llms.txt.

## Good at
Use it for trend and nostalgia ads. Send `style` (`vhs`, `retro-toon-70s`, `low-poly`, `hand-drawn` or `16bit-pixel`). The VHS look also takes `damage_level` (`light`, `medium` or `heavy`). Text-to-video takes six aspect ratios. With `image_url`, the first frame sets the framing.

## Pricing
Unit: clip. Pricing key: `h3-max-style`.

| request | credits |
|---|---|
| `5s_768p` | 5 |
| `10s_768p` | 10 |
| `15s_768p` | 15 |

Credits come from the roasOS pricing table (`MODEL_COSTS`) through the catalog. No other field changes the price.

## Modes
- `text-to-video`
- `image-to-video`

The worker derives the mode from the media fields of the request.
Provider endpoints: `minimax/h3-max/styles/16bit-pixel` · `minimax/h3-max/styles/hand-drawn` · `minimax/h3-max/styles/low-poly` · `minimax/h3-max/styles/retro-toon-70s` · `minimax/h3-max/styles/vhs`.

## Request fields
| field | type | required | default | rule |
|---|---|---|---|---|
| `aspect_ratio` | enum | no | `16:9` | `21:9`, `16:9`, `4:3`, `1:1`, `3:4`, `9:16`; only in `text-to-video` |
| `damage_level` | enum | no | — | `light`, `medium`, `heavy` |
| `duration_seconds` | integer enum | no | `5` | `5`, `6`, `7`, `8`, `9`, `10`, `11`, `12`, `13`, `14`, `15` |
| `image_url` | string | no | — | https URL; ≤ 4,096 characters; only in `image-to-video` |
| `mode` | enum | no | — | `text-to-video`, `image-to-video` |
| `prompt` | string | yes | — | ≥ 1 character; ≤ 10,000 characters |
| `quote_id` | string | no | — | UUID |
| `quote_only` | boolean | no | `false` | — |
| `resolution` | enum | no | `768p` | `768p`; pinned by roasOS, not caller-settable |
| `scene_id` | string | no | — | UUID |
| `seed` | integer | no | — | 0–2147483647 |
| `style` | enum | yes | — | `vhs`, `retro-toon-70s`, `low-poly`, `hand-drawn`, `16bit-pixel` |
| `wait_timeout_seconds` | integer | no | `0` | 0–60 |
| `webhook_url` | string | no | — | https URL; ≤ 4,096 characters |

The schema is strict: a field that is not in this table returns `400 unsupported_option`. Field names are the roasOS role names, one name per role across every family.

## Media
- `image_url` — first frame (or the single source image)
- `scene_id` — first frame — a scene this workspace owns

| role | items | max size | content types | duration |
|---|---|---|---|---|
| `image_url` | ≤ 1 | 10 MB | `image/jpeg`, `image/png`, `image/webp` | — |

- Refused: `avatar_id`, `elements`, `product_id`, `product_images`, `references`, `reference_images`, `end_image_url`, `scene_image`, `video_urls`, `video_url`, `audio_urls`, `audio_url`, `voice_id`. A refused role returns `400 unsupported_option`.
- Every URL must be an immutable object on `https://cdn.roasos.com/…` that your workspace owns; any other URL is `400 reference_media_not_workspace_owned`. Upload with `POST /v1/uploads` (direct POST of the bytes to `put_url`, or a `source_url` import), then use the returned CDN URL.

## Prompt
Limit 10,000 characters.
- Describe the scene and the action, not the look. The endpoint applies the style.
- Direct the sound, or the model makes its own.

## Not exposed
- `prompt_expansion_mode`: pinned to `the style endpoints have no expansion field`.
- `enable_safety_checker`: pinned to `provider default (on); never sent`.
- `sync_mode`: not accepted by this public endpoint.
- `negative_prompt`: not accepted by this public endpoint.
- `generate_audio`: pinned to `every output carries a generated soundtrack; there is no on/off field`.
- `cfg_scale`: not accepted by this public endpoint.
- `shot_type`: not accepted by this public endpoint.
- `multi_prompt`: not accepted by this public endpoint.
- `resolution`: pinned to `fixed 768p`.
- `references`: not accepted by this public endpoint.
- `avatar_id`: not accepted by this public endpoint.
- `product_id`: not accepted by this public endpoint.
- `video_urls`: not accepted by this public endpoint.
- `audio_urls`: not accepted by this public endpoint.
- `audio_url`: not accepted by this public endpoint.
- `end_image_url`: not accepted by this public endpoint.

## Result
Result kind `video`. Always present: `url`.
```json
{ "data": { "id": "gen_…", "kind": "video", "model": "h3-max-style", "status": "completed", "result": {"url":"https://cdn.roasos.com/workspaces/ws_01/result"} } }
```
Files live on `https://cdn.roasos.com` and are immutable; a result URL can be a media input to the next call. Poll `GET /v1/jobs/{id}/status` → `{ id, status, updated_at }`, then `GET /v1/jobs/{id}/result` (`409 run_not_completed` until the job is `completed`, `failed` or `canceled`). Statuses: `queued → processing → completed | failed | canceled`.

## Example
```bash
# 1. quote — nothing is spent
curl -X POST https://api.roasos.com/v1/video/h3-max-style \
  -H "Authorization: Bearer roasos_sk_live_…" \
  -H "Idempotency-Key: 0f1c9e2a-h3-max-style-0001" \
  -H "Content-Type: application/json" \
  -d '{"quote_only":true,"prompt":"A woman holds the bottle at eye level in a bright kitchen, morning light, static camera.","style":"vhs"}'
# → 200 { "data": { "kind": "quote", "quote_id": "q_7Hk…", "credits": 5, "expires_at": "…", "confirmation": { "model": "h3-max-style", "example": "5s_768p" } } }

# 2. run — the same body and the same Idempotency-Key, quote_id instead of quote_only
curl -X POST https://api.roasos.com/v1/video/h3-max-style \
  -H "Authorization: Bearer roasos_sk_live_…" \
  -H "Idempotency-Key: 0f1c9e2a-h3-max-style-0001" \
  -H "Content-Type: application/json" \
  -d '{"quote_id":"q_7Hk…","prompt":"A woman holds the bottle at eye level in a bright kitchen, morning light, static camera.","style":"vhs"}'
# → 201 { "data": { "id": "gen_…", "kind": "video", "model": "h3-max-style", "status": "queued", "credits_reserved": 5, "links": { "status": "/v1/jobs/gen_…/status", "result": "/v1/jobs/gen_…/result" } } }

# 3. poll
curl https://api.roasos.com/v1/jobs/gen_…/status -H "Authorization: Bearer roasos_sk_live_…"
curl https://api.roasos.com/v1/jobs/gen_…/result -H "Authorization: Bearer roasos_sk_live_…"
```

## Today
`POST /v1/video/h3-max-style` with `prompt`, `style`, `damage_level` (VHS only), `image_url` or `scene_id`, `duration_seconds` (5-15), `aspect_ratio` (text only) and `seed`.

## See also
https://docs.roasos.com/models/video/h3-max-style · https://api.roasos.com/v1/catalog/video/h3-max-style · minimax/h3-max/styles/16bit-pixel · minimax/h3-max/styles/hand-drawn · minimax/h3-max/styles/low-poly · minimax/h3-max/styles/retro-toon-70s · minimax/h3-max/styles/vhs