---
title: "Categories"
description: "列出 Walmart 类目树的一层，并把类目 id 转换为 Browse 接受的形式。"
---

> Every apinoa docs page as markdown: https://apinoa.com/llms.txt (all in one file: https://apinoa.com/llms-full.txt; this API family in one file: https://apinoa.com/docs/marketplace/llms.txt)

```http
GET | POST /v1/walmart/categories
```

参数可以用 `GET` 的查询字符串发送，也可以用 `POST` 的 JSON 请求体发送，两者等价。

## 请求

```bash tab="cURL"
curl "https://gateway.apinoa.com/v1/walmart/categories" \
  -H "x-api-key: $APINOA_API_KEY"
```

```js tab="JavaScript"
const res = await fetch("https://gateway.apinoa.com/v1/walmart/categories", {
  headers: { "x-api-key": process.env.APINOA_API_KEY },
});
const { success, data, error } = await res.json();
```

```python tab="Python"
import os

import requests

res = requests.get(
    "https://gateway.apinoa.com/v1/walmart/categories",
    headers={"x-api-key": os.environ["APINOA_API_KEY"]},
)
body = res.json()
```

## 参数

| Parameter | Type | Required | Notes |
|---|---|---|---|
| `categoryId` | string |  | Omit for the 42 departments; give a bare department id (`4171`) or an underscore chain to list that category's children. Unlike `browse`, a bare id is accepted here — descending from one is how a client reaches the chains `browse` takes. |
| `region` | string |  | Buyer country as ISO 3166-1 alpha-2; sets availability, shipping and price. |

The same parameters, and every response type, are in the OpenAPI document: https://apinoa.com/openapi.json

## 响应

在 `data` 中返回 [`CategoryList`](/docs/api-reference/marketplaces/response-schema#categorylist)。 真实响应的节选：数组只保留前几项，长文本已截断。

```json
{
  "success": true,
  "data": {
    "marketplace": "walmart",
    "path": [],
    "categories": [
      {
        "id": "1334134",
        "name": "Arts Crafts & Sewing",
        "browsable": true
      },
      {
        "id": "91083",
        "name": "Auto & Tires",
        "browsable": false
      }
    ]
  }
}
```

## 错误

| 状态 | 代码 | 含义 |
|---|---|---|
| 400 | `INVALID_PARAMS` | 参数缺失、未知或超出范围。消息中会指出是哪一个。 |
| 401 | `UNAUTHORIZED` | 缺少 `x-api-key` 请求头，或密钥已吊销或未知。 |
| 402 | `INSUFFICIENT_BALANCE` | 余额不足以支付本次调用。请在控制台充值。 |
| 429 | `MARKETPLACE_SATURATED` | 并发调用过多。请等待 `Retry-After` 秒后重试。 |
| 502 | `UPSTREAM_ERROR` | 平台返回了无法使用的内容。请退避后重试。 |

全部错误代码见 [Errors](/docs/errors)。失败的调用不计费。

## 价格

**Price** $0.001 per call, plus $0.001 for each extra call it makes — at most 1 more, so $0.002 in total. [List price](https://apinoa.com/en/pricing); the rate steps down above 1,000 calls a day.

## 说明

- **省略 `categoryId` 返回 42 个部门。** 传入一个 id 则列出其子类目。
- **子类目以链的形式返回**（`4171_4186`），Search 和 Browse 都接受。单独的部门 id（`4171`）两者也都接受：Browse 会列出该部门的全部商品。
- **部门不报告 `browsable`。** 每个部门都可以浏览，用其子类目缩小范围。