# Flux 3 Draft Enhance API

> Αποδίδει ξανά ένα αποθηκευμένο προσχέδιο σε πλήρη ποιότητα, διατηρώντας τον σπόρο και την κίνησή του

Λαμβάνει το πακέτο προσωρινής μνήμης προσχεδίου που επιστρέφεται από ένα από τα τελικά σημεία προσχεδίων, το οποίο περνά ως `draft_cache_url`, και αποδίδει από αυτό το τελικό βίντεο. Η κίνηση και ο σπόρος του προσχεδίου διατηρούνται, επομένως δεν χρειάζεται νέο prompt κειμένου. Εκτός από την κρυφή μνήμη, μπορεί να ρυθμιστεί μόνο το `safety_tolerance` (0 έως 4).

- Model id: `blackforestlabs/flux-3/draft-enhance`
- Made by: Black Forest Labs
- Category: Video to Video
- Output: video
- Estimated price per run: $3.48 / run (cheapest run $3.48 (3480 API credits))
- Run: `POST https://api.doitong.com/v1/run/blackforestlabs/flux-3/draft-enhance`
- Quote: `POST https://api.doitong.com/v1/quote/blackforestlabs/flux-3/draft-enhance`
- Docs page: https://doitong.com/el/developers/models/blackforestlabs/flux-3/draft-enhance

## Pricing

Price: **$3.48 / run**. Estimated from the typical cost of one run. The quote is exactly what the run charges.

The full example input below costs $3.48 = 3480 API credits (1 request × 3480 API credits).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). `POST https://api.doitong.com/v1/quote/blackforestlabs/flux-3/draft-enhance` 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

| Parameter | Canonical name | Type | Required | Default | Allowed values / range | Description |
|---|---|---|---|---|---|---|
| `draft_cache_url` |  | string | yes |  |  | Κρυπτογραφημένο πακέτο προσωρινής μνήμης προσχεδίου για βελτίωση, που παρέχεται ως URL ή URI δεδομένων. |
| `safety_tolerance` |  | integer | no | `2` | 0 – 4 | Η ανοχή ασφάλειας βίντεο χρησιμοποιεί κλίμακα όπου η πιο επιτρεπτική ρύθμιση είναι 4 και η αυστηρότερη 0. |

## Example input

Required parameters only:

```json
{
  "draft_cache_url": "https://example.com/your-file.bin"
}
```

A fuller example:

```json
{
  "draft_cache_url": "https://example.com/your-file.bin"
}
```

## 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.com/v1/run/blackforestlabs/flux-3/draft-enhance?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "draft_cache_url": "https://example.com/your-file.bin"
  }'

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

### JavaScript

```javascript
const API = "https://api.doitong.com/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/blackforestlabs/flux-3/draft-enhance?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "draft_cache_url": "https://example.com/your-file.bin"
  }),
});
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.com/v1"
headers = {"Authorization": "Bearer " + os.environ["DOITONG_API_KEY"]}

payload = {
    "draft_cache_url": "https://example.com/your-file.bin",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/blackforestlabs/flux-3/draft-enhance", 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.com/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": "blackforestlabs/flux-3/draft-enhance",
      "input": {
        "draft_cache_url": "https://example.com/your-file.bin"
      },
      "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": "blackforestlabs/flux-3/draft-enhance",
  "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": 3480,
    "usd": "3.48",
    "charged": 3480,
    "refunded": 0
  },
  "input": {
    "draft_cache_url": "https://example.com/your-file.bin"
  },
  "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.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `video` | object {url, content_type, file_name, file_size} | Βίντεο που προκύπτει από βελτίωση. |

## Related models

- [Flux 3 Text To Video Draft](https://doitong.com/developers/models/blackforestlabs/flux-3/text-to-video/draft.md) (`blackforestlabs/flux-3/text-to-video/draft`): $0.06 / second
- [Flux 3 First Last Frame to Video Draft](https://doitong.com/developers/models/blackforestlabs/flux-3/first-last-frame-to-video/draft.md) (`blackforestlabs/flux-3/first-last-frame-to-video/draft`): $0.06 / second
- [Flux 3 Image To Video Draft](https://doitong.com/developers/models/blackforestlabs/flux-3/image-to-video/draft.md) (`blackforestlabs/flux-3/image-to-video/draft`): $0.06 / second
- [Flux 3 Keyframes To Video Draft](https://doitong.com/developers/models/blackforestlabs/flux-3/keyframes-to-video/draft.md) (`blackforestlabs/flux-3/keyframes-to-video/draft`): $0.06 / second
- [Flux 3 Extend Video Draft](https://doitong.com/developers/models/blackforestlabs/flux-3/extend-video/draft.md) (`blackforestlabs/flux-3/extend-video/draft`): $0.12 / second
- [Flux 3 Action](https://doitong.com/developers/models/flux-3-action/so101.md) (`flux-3-action/so101`): $0.003 / run
- [Flux 3 Extend Video](https://doitong.com/developers/models/blackforestlabs/flux-3/extend-video.md) (`blackforestlabs/flux-3/extend-video`): from $0.41 / second
- [Flux 3 FAST Edit Video](https://doitong.com/developers/models/blackforestlabs/flux-3/edit-video.md) (`blackforestlabs/flux-3/edit-video`): $0.03 / second of input video

## Links

- HTML page: https://doitong.com/developers/models/blackforestlabs/flux-3/draft-enhance
- 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=blackforestlabs/flux-3/draft-enhance
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/blackforestlabs/flux-3/draft-enhance