> ## Documentation Index
> Fetch the complete documentation index at: https://docs.crazyrouter.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Fal.ai 图像

> 通过 Fal.ai 端点进行文生图和图像编辑

> 更新日期：2026-06-06

# Fal.ai 图像

Crazyrouter 代理了 Fal.ai 的图像生成端点，支持文生图和图像编辑。

## 文生图

```
POST /fal-ai/nano-banana
```

### 请求参数

| 参数                    | 类型      | 必填 | 说明                                                                               |
| --------------------- | ------- | -- | -------------------------------------------------------------------------------- |
| `prompt`              | string  | 是  | 图像描述提示词                                                                          |
| `negative_prompt`     | string  | 否  | 负面提示词                                                                            |
| `image_size`          | string  | 否  | 图片尺寸：`square_hd`、`landscape_4_3`、`portrait_4_3`、`landscape_16_9`、`portrait_16_9` |
| `num_images`          | integer | 否  | 生成数量，默认 1                                                                        |
| `seed`                | integer | 否  | 随机种子                                                                             |
| `guidance_scale`      | number  | 否  | 引导强度                                                                             |
| `num_inference_steps` | integer | 否  | 推理步数                                                                             |

### 请求示例

<CodeGroup>
  ```bash cURL theme={null}
  curl -X POST https://api.crazyrouter.com/fal-ai/nano-banana \
    -H "Content-Type: application/json" \
    -H "Authorization: Bearer YOUR_API_KEY" \
    -d '{
      "prompt": "A majestic eagle soaring over snow-capped mountains at sunrise",
      "image_size": "landscape_16_9",
      "num_images": 1
    }'
  ```

  ```python Python theme={null}
  import requests

  response = requests.post(
      "https://api.crazyrouter.com/fal-ai/nano-banana",
      headers={
          "Content-Type": "application/json",
          "Authorization": "Bearer YOUR_API_KEY"
      },
      json={
          "prompt": "A majestic eagle soaring over snow-capped mountains at sunrise",
          "image_size": "landscape_16_9",
          "num_images": 1
      }
  )

  print(response.json())
  ```
</CodeGroup>

### 响应示例

```json theme={null}
{
  "images": [
    {
      "url": "https://fal.media/files/...",
      "width": 1344,
      "height": 768,
      "content_type": "image/jpeg"
    }
  ],
  "seed": 42,
  "prompt": "A majestic eagle soaring over snow-capped mountains at sunrise"
}
```

***

## 图像编辑

```
POST /fal-ai/nano-banana/edit
```

基于已有图像进行编辑。

### 请求参数

| 参数          | 类型     | 必填 | 说明       |
| ----------- | ------ | -- | -------- |
| `prompt`    | string | 是  | 编辑描述     |
| `image_url` | string | 是  | 原始图片 URL |
| `mask_url`  | string | 否  | 遮罩图片 URL |
| `strength`  | number | 否  | 编辑强度，0-1 |

### 请求示例

```bash cURL theme={null}
curl -X POST https://api.crazyrouter.com/fal-ai/nano-banana/edit \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "prompt": "Add a rainbow in the sky",
    "image_url": "https://example.com/landscape.jpg",
    "strength": 0.6
  }'
```

### 响应示例

```json theme={null}
{
  "images": [
    {
      "url": "https://fal.media/files/...",
      "width": 1024,
      "height": 1024,
      "content_type": "image/jpeg"
    }
  ]
}
```

<Note>
  Fal.ai 端点支持多种底层模型，具体可用模型请参考 [模型定价](https://crazyrouter.com/pricing) 页面。
</Note>