# PixVerse Extend Fast API

> Upanuzi wa video wa haraka zaidi wenye kikomo cha 720p, chaguo la toleo la modeli na sauti ya hiari

Toleo la haraka zaidi la zana ya upanuzi wa video. Huendeleza klipu iliyo katika `video_url` kwa kufuata `prompt` yako, huku `negative_prompt`, `style` na `seed` zikipatikana. Ubora umewekewa kikomo cha 360p, 540p au 720p, kwa kuwa 1080p haitumiki, na hakuna ingizo la `duration`. Sehemu ya `model` huchagua toleo kutoka v3.5 hadi v6, na uzalishaji wa sauti unapatikana kwenye v5.6 na mpya zaidi.

- Model id: `pixverse/extend/fast`
- Made by: PixVerse
- Category: Video to Video
- Output: video
- Price per run: from $0.30 / run (cheapest run $0.30 (300 API credits))
- Run: `POST https://api.doitong.ru/v1/run/pixverse/extend/fast`
- Quote: `POST https://api.doitong.ru/v1/quote/pixverse/extend/fast`
- Docs page: https://doitong.com/sw/developers/models/pixverse/extend/fast

## Pricing

Price: **from $0.30 / run** (the lowest tier; the quote prices your exact input). Price per run: the input files are measured before the run (length, resolution, frame rate). The quote measures the same files and is exactly what the run charges.

Price by tier:

- 360p: $0.30 / run
- 540p: $0.30 / run
- 720p: $0.40 / run

The full example input below costs $0.40 = 400 API credits (1 run × $0.40 (720p)).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). `POST https://api.doitong.ru/v1/quote/pixverse/extend/fast` with the same JSON body returns the exact price for that input; the quote is exactly what a run charges. Invalid input is never charged and failed or canceled requests are refunded automatically.

## Input parameters

Send either the canonical name or the native field name (not both). Canonical names are the same across models.

| Parameter | Canonical name | Type | Required | Default | Allowed values / range | Description |
|---|---|---|---|---|---|---|
| `video_url` | `video` | string (video URL) | yes |  |  | URL inayoelekeza kwenye video inayopanuliwa. |
| `prompt` |  | string | yes |  |  | Kidokezo kinachobainisha upanuzi wa video unaotakiwa. |
| `negative_prompt` |  | string | no | `` |  | Kidokezo hasi kinachotumika wakati wa uzalishaji. |
| `style` |  | enum (string) \| null | no |  | `anime`, `3d_animation`, `clay`, `comic`, `cyberpunk` | Mtindo wa kuona wa upanuzi wa video. |
| `resolution` |  | enum (string) | no | `720p` | `360p`, `540p`, `720p` | Chaguo la mwonekano wa tokeo, ambapo 1080p haipatikani wakati hali ya Fast imewashwa. |
| `model` |  | enum (string) | no | `v4.5` | `v3.5`, `v4`, `v4.5`, `v5`, `v5.5`, `v5.6`, `v6` | Toleo la modeli lililotumika kwa uzalishaji. |
| `seed` |  | integer \| null | no |  |  | Mbegu inayodhibiti nasibu wakati wa uzalishaji. |
| `generate_audio_switch` | `generate_audio` | boolean | no | `false` |  | Kigeuza uzalishaji wa sauti kwa muziki wa mandharinyuma, madoido ya sauti na mazungumzo. Kinapatikana kwenye modeli v5.6 na matoleo ya baadaye. |

File parameters (`video`) take a public `https://` URL, a `data:` URI up to 10 MB, or the `file_url` of an upload from `POST /files`.

## Example input

Required parameters only:

```json
{
  "video": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
}
```

A fuller example:

```json
{
  "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
}
```

## Run it

Set `DOITONG_API_KEY` to a key from https://doitong.com/developers/dashboard#keys. `?wait=20` returns the finished request in the same call when it is ready within 20 seconds; otherwise poll `GET /requests/{id}` (it also accepts `?wait=`), or pass `webhook_url`.

### curl

```bash
# Run the model; wait up to 20 s for the finished result in the same call
curl -X POST "https://api.doitong.ru/v1/run/pixverse/extend/fast?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }'

# Still "queued" or "running"? Poll with the id from the response:
curl "https://api.doitong.ru/v1/requests/REQUEST_ID?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY"
```

### JavaScript

```javascript
const API = "https://api.doitong.ru/v1";
const headers = {
  "Authorization": "Bearer " + process.env.DOITONG_API_KEY,
  "Content-Type": "application/json",
};

// Run the model; wait up to 20 s for the finished result in the same call
let res = await fetch(API + "/run/pixverse/extend/fast?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }),
});
let request = await res.json();
if (!res.ok) throw new Error(request.error.code + ": " + request.error.message);

// Not finished yet: long-poll until it is
while (request.status === "queued" || request.status === "running") {
  res = await fetch(API + "/requests/" + request.id + "?wait=20", { headers });
  request = await res.json();
}
if (request.status !== "succeeded") throw new Error(JSON.stringify(request.error));
console.log(request.outputs.map((o) => o.url), request.cost.credits + " API credits ($" + request.cost.usd + ")");
```

### Python

```python
import os
import requests

API = "https://api.doitong.ru/v1"
headers = {"Authorization": "Bearer " + os.environ["DOITONG_API_KEY"]}

payload = {
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/pixverse/extend/fast", params={"wait": 20}, json=payload, headers=headers)
request = r.json()
if not r.ok:
    raise RuntimeError(request["error"]["code"] + ": " + request["error"]["message"])

# Not finished yet: long-poll until it is
while request["status"] in ("queued", "running"):
    request = requests.get(API + "/requests/" + request["id"], params={"wait": 20}, headers=headers).json()
if request["status"] != "succeeded":
    raise RuntimeError(request["error"])
print([o["url"] for o in request["outputs"]], request["cost"]["credits"], "API credits", "$" + request["cost"]["usd"])
```

### MCP

The MCP server at `https://api.doitong.ru/v1/mcp` exposes the tools `search_models`, `get_model`, `quote`, `run`, `get_request`, `cancel_request`, `list_requests`, `create_upload` and `get_account`. A `run` call for this model:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "run",
    "arguments": {
      "model_id": "pixverse/extend/fast",
      "input": {
        "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
      },
      "wait_seconds": 20
    }
  }
}
```

## Response

Every call returns a request object. `status` is one of `queued`, `running`, `succeeded`, `failed`, `canceled`. `outputs` lists the generated files with URLs on our storage (kept forever, or 7 days with `?storage=temporary`; `storage` says which); `output` is the model's own result object with the same URLs.

```json
{
  "id": "req_8k2m4q7x1z9c3v5b6n0p2r4t",
  "object": "request",
  "model": "pixverse/extend/fast",
  "status": "succeeded",
  "created_at": "2026-10-20T12:00:00Z",
  "started_at": "2026-10-20T12:00:02Z",
  "completed_at": "2026-10-20T12:00:09Z",
  "queue_position": null,
  "cost": {
    "credits": 400,
    "usd": "0.40",
    "charged": 400,
    "refunded": 0
  },
  "input": {
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  },
  "output": {
    "video": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_name": "0-output.mp4",
      "file_size": 1843200
    }
  },
  "outputs": [
    {
      "type": "video",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_size": 1843200,
      "width": 1280,
      "height": 720,
      "duration": 5,
      "stored": true
    }
  ],
  "error": null,
  "metrics": {
    "inference_seconds": 6.8
  },
  "urls": {
    "self": "https://api.doitong.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `video` | object {url, content_type, file_name, file_size} | Video iliyotolewa kwa kupanua ingizo. |

## Related models

- [PixVerse V4.5 Text To Video](https://doitong.com/developers/models/pixverse/v4.5/text-to-video.md) (`pixverse/v4.5/text-to-video`): from $0.15 / run
- [PixVerse V4.5 Text To Video Fast](https://doitong.com/developers/models/pixverse/v4.5/text-to-video/fast.md) (`pixverse/v4.5/text-to-video/fast`): from $0.30 / request
- [PixVerse V4.5 Effects](https://doitong.com/developers/models/pixverse/v4.5/effects.md) (`pixverse/v4.5/effects`): from $0.15 / run
- [PixVerse V4.5 Image To Video](https://doitong.com/developers/models/pixverse/v4.5/image-to-video.md) (`pixverse/v4.5/image-to-video`): from $0.15 / run
- [PixVerse V4.5 Image To Video Fast](https://doitong.com/developers/models/pixverse/v4.5/image-to-video/fast.md) (`pixverse/v4.5/image-to-video/fast`): from $0.30 / request
- [PixVerse V4.5 Transition](https://doitong.com/developers/models/pixverse/v4.5/transition.md) (`pixverse/v4.5/transition`): from $0.15 / run
- [PixVerse Extend](https://doitong.com/developers/models/pixverse/extend.md) (`pixverse/extend`): from $0.15 / run
- [PixVerse Lipsync](https://doitong.com/developers/models/pixverse/lipsync.md) (`pixverse/lipsync`): $0.04 / second of output video

## Links

- HTML page: https://doitong.com/developers/models/pixverse/extend/fast
- All models and guides for AI agents: https://doitong.com/developers/llms.txt
- OpenAPI 3.1 with this model's typed request body: https://doitong.com/developers/openapi.json?model=pixverse/extend/fast
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/pixverse/extend/fast