> For the complete documentation index, see [llms.txt](https://docs.geeknums.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.geeknums.io/yuecha-xun-api.md).

# 余额查询API

查询与 API 密钥关联的当前可用余额。

## API 端点

`GET https://api.checknumber.ai/v1/balance`

## 请求头

| 请求头         | 说明                                    |
| ----------- | ------------------------------------- |
| `X-API-Key` | `string`，必填 API 密钥；也接受 `X-Access-Key` |

> 成功响应示例

```json
{  "balance": 9850.50}
```

> 未授权响应示例

```json
{  "error": "unauthorized",  "message": "需要访问密钥（X-API-Key 或 X-Access-Key）"}
```

## 响应字段

| 字段        | 说明                | 示例      |
| --------- | ----------------- | ------- |
| `balance` | API 密钥对应的可用余额（积分） | 9850.50 |

## 状态码

| 状态码   | 说明              |
| ----- | --------------- |
| `200` | 请求成功            |
| `401` | 未授权：API 密钥缺失或无效 |
| `502` | 余额查询失败：上游服务错误   |


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.geeknums.io/yuecha-xun-api.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.