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

# Nano Banana Images API 对接说明

> Nano Banana Image Generation 集成指南 - XHuoAPI

本文介绍 Nano Banana Images API 的对接与使用。该接口支持两种能力：**图像生成（generate）** 与 **图像编辑（edit）**。

## 申请流程

使用前，请在 XHuoAPI 平台中进入 [Nano Banana Images API](https://api.xhuoapi.ai/documents/23985a11-d713-41d1-ad84-24b021805b3d) 并点击 Acquire 申请开通。首次申请通常会有免费额度可用。开通完成后，即可在平台中获取到用于调用 API 的 Bearer Token。

## 接口概览

* **Base URL**：`https://api.xhuoapi.ai/v1`

* **Endpoint**：`POST /nano-banana/images`

* **认证方式**：HTTP Header 中携带 `authorization: Bearer {token}`

* **请求头**：

  * `accept: application/json`
  * `content-type: application/json`

* **动作（action）**：

  * `generate`：根据文本提示词生成图片
  * `edit`：基于给定图片进行编辑

* **模型（model）**（可选）：

  * `nano-banana`（默认）：基于 Gemini 2.5 Flash Image，速度快，成本低
  * `nano-banana-2`：基于 Gemini 3.1 Flash Image Preview，Pro 级质量 + Flash 速度
  * `nano-banana-pro`：基于 Gemini 3 Pro Image Preview，最高质量

* **异步回调**：可选，通过 `callback_url` 接收任务完成通知与结果

## 快速开始：生成图片（`action=generate`）

**最小必需参数**：`action`、`prompt`
当你只想根据提示词直接出图时，设置 `action` 为 `generate`，并提供清晰的 `prompt` 即可。

### 请求示例（cURL）

```bash theme={null}
curl -X POST 'https://api.xhuoapi.ai/v1/nano-banana/images' \
  -H 'authorization: Bearer {token}' \
  -H 'accept: application/json' \
  -H 'content-type: application/json' \
  -d '{
    "action": "generate",
    "prompt": "A photorealistic close-up portrait of an elderly Japanese ceramicist with deep, sun-etched wrinkles and a warm, knowing smile. He is carefully inspecting a freshly glazed tea bowl. The setting is his rustic, sun-drenched workshop. The scene is illuminated by soft, golden hour light streaming through a window, highlighting the fine texture of the clay. Captured with an 85mm portrait lens, resulting in a soft, blurred background (bokeh). The overall mood is serene and masterful. Vertical portrait orientation.",
    "count": 1
  }'
```

### 请求示例（Python）

```python theme={null}
import requests

url = "https://api.xhuoapi.ai/v1/nano-banana/images"
headers = {
    "authorization": "Bearer {token}",
    "accept": "application/json",
    "content-type": "application/json",
}
payload = {
    "action": "generate",
    "prompt": (
        "A photorealistic close-up portrait of an elderly Japanese ceramicist "
        "with deep, sun-etched wrinkles and a warm, knowing smile. He is carefully "
        "inspecting a freshly glazed tea bowl. The setting is his rustic, sun-drenched "
        "workshop. The scene is illuminated by soft, golden hour light streaming through "
        "a window, highlighting the fine texture of the clay. Captured with an 85mm "
        "portrait lens, resulting in a soft, blurred background (bokeh). The overall mood "
        "is serene and masterful. Vertical portrait orientation."
    ),
    "count": 1
}
resp = requests.post(url, json=payload, headers=headers)
print(resp.json())
```

### 成功返回示例

```json theme={null}
{
  "success": true,
  "task_id": "056f0589-a3dd-4ec2-8440-ad61f5038dfa",
  "trace_id": "c48de83f-0077-426e-b02b-ff1d58179064",
  "data": [
    {
      "prompt": "A photorealistic close-up portrait of an elderly Japanese ceramicist with deep, sun-etched wrinkles and a warm, knowing smile. He is carefully inspecting a freshly glazed tea bowl. The setting is his rustic, sun-drenched workshop. The scene is illuminated by soft, golden hour light streaming through a window, highlighting the fine texture of the clay. Captured with an 85mm portrait lens, resulting in a soft, blurred background (bokeh). The overall mood is serene and masterful. Vertical portrait orientation.",
      "image_url": "https://platform.cdn.xhuoapi.ai/nanobanana/69790adb-c85d-4362-ad9e-0c9ba4352cf4.png"
    }
  ]
}
```

### 字段说明

* `success`：本次请求是否成功。
* `task_id`：任务 ID。
* `trace_id`：链路追踪 ID，便于排查问题。
* `data[]`：结果列表。

  * `prompt`：用于生成的提示词（回显）。
  * `image_url`：生成图片的直链 URL。

> 注：`/nano-banana/images` 仅需 `action` 与 `prompt` 即可生成图片

## 编辑图片（`action=edit`）

当你希望基于已有图片进行编辑时，设置 `action` 为 `edit`，并通过 `image_urls` 传入待编辑的图片链接列表（1 张或多张），同时提供描述编辑目标的 `prompt`。

比如这里我们提供一张人物照片，一张衣服照片，让人物穿上这个衣服，就可以同时传入图片链接，并且指定 action 为 `edit`，URL 可以是 HTTP URL，以 `https` 或 `http` 协议的公开可访问链接，也可以是 Base64 编码的图片，如 `data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAA+gAAAVGCAMAAAA6u2FyAAADAFBMVEXq6uwdHCEeHyMdHS....`

### 请求示例（cURL）

```bash theme={null}
curl -X POST 'https://api.xhuoapi.ai/v1/nano-banana/images' \
  -H 'authorization: Bearer {token}' \
  -H 'accept: application/json' \
  -H 'content-type: application/json' \
  -d '{
    "action": "edit",
    "prompt": "let this man wear on this T-shirt",
    "image_urls": [
      "https://cdn.xhuoapi.ai/v8073y.png",
      "https://cdn.xhuoapi.ai/44xlah.png"
    ],
    "count": 1
  }'
```

### 请求示例（Python）

```python theme={null}
import requests

url = "https://api.xhuoapi.ai/v1/nano-banana/images"
headers = {
    "authorization": "Bearer {token}",
    "accept": "application/json",
    "content-type": "application/json",
}
payload = {
    "action": "edit",
    "prompt": "let this man wear on this T-shirt",
    "image_urls": [
        "https://cdn.xhuoapi.ai/v8073y.png",
        "https://cdn.xhuoapi.ai/44xlah.png"
    ],
    "count": 1
}
resp = requests.post(url, json=payload, headers=headers)
print(resp.json())
```

### 成功返回示例

```json theme={null}
{
  "success": true,
  "task_id": "93f11baf-347b-4bb4-9520-8653cb46d6a3",
  "trace_id": "a9063166-26ed-4451-85b5-54e896817c69",
  "data": [
    {
      "prompt": "let this man wear on this T-shirt",
      "image_url": "https://platform.cdn.xhuoapi.ai/nanobanana/8e9e0253-26f4-45b9-b3f8-ac1aed1c284b.png"
    }
  ]
}
```

### 字段说明

* `image_urls[]`：待编辑图片 URL 列表（必须可公网访问）。可传多张，服务会结合这些素材与 `prompt` 完成编辑。
* 其余字段同「生成图片」返回。

***

## 异步回调（可选，推荐）

生成或编辑可能需要一定时间。为避免长连接占用资源，建议通过 `callback_url` 使用 **Webhook 回调**：

1. 在请求体中添加 `callback_url`，例如你的服务端 Webhook 地址（需可公网访问，支持 POST JSON）。
2. API 会 **立即返回** 包含 `task_id` 的响应（或包含基本结果）。
3. 当任务完成后，平台将以 `POST` 的方式将完整 JSON 发送至 `callback_url`。你可以通过 `task_id` 将请求与结果关联。

**回调载荷示例**（字段结构与同步成功返回一致）：

```json theme={null}
{
  "success": true,
  "task_id": "6a97bf49-df50-4129-9e46-119aa9fca73c",
  "trace_id": "9b4b1ff3-90f2-470f-b082-1061ec2948cc",
  "data": [
    {
      "prompt": "a white siamese cat",
      "image_url": "https://platform.cdn.xhuoapi.ai/nanobanana/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.png"
    }
  ]
}
```

***

## 错误处理

调用失败时会返回标准错误格式与追踪 ID。常见错误如下：

* **400 `token_mismatched`**：请求不合法或参数错误。
* **400 `api_not_implemented`**：接口未实现（请联系支持）。
* **401 `invalid_token`**：鉴权失败或缺少 Token。
* **429 `too_many_requests`**：请求频率超限。
* **500 `api_error`**：服务端异常。

### 错误响应示例

```json theme={null}
{
  "success": false,
  "error": {
    "code": "api_error",
    "message": "Internal server error."
  },
  "trace_id": "2cf86e86-22a4-46e1-ac2f-032c0f2a4e89"
}
```

***

## 参数对照与注意事项

* **必填**：`action`、`prompt`
* **编辑专用**：`image_urls`（数组，至少 1 项）
* **可选**：`model`（默认 `nano-banana`，可选 `nano-banana-2` 或 `nano-banana-pro`）、`aspect_ratio`（宽高比，如 `1:1`、`16:9`）、`resolution`（分辨率，如 `1K`、`2K`、`4K`）、`callback_url`（用于异步回调）
* **Headers**：必须提供 `authorization: Bearer {token}`；`accept` 建议设为 `application/json`
* **图片可访问性**：`image_urls` 必须为可公网访问的直链（HTTP/HTTPS），建议使用 HTTPS
* **幂等与追踪**：保留 `task_id` 与 `trace_id`，便于故障排查与结果关联