# Search course sections

Search published course video sections by subject, literal keyword, or literal course tag query. The server returns factual section candidates and a stable contentRef; the local Agent decides whether one fits the learner.

- Capability ID: `courses.search_sections`
- Operation: `ielts_courses_search_sections`
- Category: 课程学习
- Endpoint: `POST /api/v1/agent/capabilities/ielts_courses_search_sections`
- Authentication: Bearer Token（通过 /api/v1/agent-bindings 绑定账号）
- Required scopes: courses:read
- Side effect: read
- Human documentation: https://ieltsbuddy.igopx.cn/developers/api/ielts_courses_search_sections

## Request parameters

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `courseId` | number | 否 | Optional exact course id returned by the learning route. |
| `limit` | number | 否 | Maximum number of exact course sections to return. |
| `page` | number | 否 | Result page. Use nextPage from the preceding search. |
| `search` | string | 否 | Optional course, section, or video keyword. |
| `subject` | string | 否 | Optional IELTS subject filter. |
| `tagQueries` | unknown[] | 否 | Literal course labels or user-mentioned learning terms used to match course tags. |

## Request example

```bash
curl -X POST \
  'https://work.ieltsbuddy.igopx.cn/api/v1/agent/capabilities/ielts_courses_search_sections' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer $IELTS_BUDDY_TOKEN' \
  --data '{"limit":4,"page":1,"search":"","subject":"","tagQueries":[]}'
```

## Request schema

```json
{
  "type": "object",
  "properties": {
    "courseId": {
      "description": "Optional exact course id returned by the learning route.",
      "type": "integer",
      "exclusiveMinimum": 0,
      "maximum": 9007199254740991
    },
    "limit": {
      "default": 4,
      "description": "Maximum number of exact course sections to return.",
      "type": "integer",
      "minimum": 1,
      "maximum": 6
    },
    "page": {
      "default": 1,
      "description": "Result page. Use nextPage from the preceding search.",
      "type": "integer",
      "minimum": 1,
      "maximum": 1000
    },
    "search": {
      "default": "",
      "description": "Optional course, section, or video keyword.",
      "type": "string"
    },
    "subject": {
      "default": "",
      "description": "Optional IELTS subject filter.",
      "type": "string",
      "enum": [
        "",
        "listening",
        "reading",
        "speaking",
        "writing",
        "grammar"
      ]
    },
    "tagQueries": {
      "default": [],
      "description": "Literal course labels or user-mentioned learning terms used to match course tags.",
      "maxItems": 6,
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1,
        "maxLength": 80
      }
    }
  },
  "required": [
    "limit",
    "page",
    "search",
    "subject",
    "tagQueries"
  ],
  "additionalProperties": false
}
```

## Response envelope

```json
{
  "code": 0,
  "data": {},
  "message": "ok"
}
```

## Errors

| HTTP | Code | Meaning |
| --- | --- | --- |
| 400 | `40001` | 请求参数不符合接口契约 |
| 401 | `40101` | 缺少或使用了无效的访问令牌 |
| 403 | `40301` | 访问令牌不包含接口所需权限 |
| 404 | `40401` | 接口或目标资源不存在 |