# Search dictation materials

Search exact listening materials ready for sentence-level dictation by title, difficulty, and literal taxonomy terms. Results are paginated and include factual tags, segment count, and a stable listening_dictation contentRef. The local Agent chooses the material.

- Capability ID: `dictation.search_materials`
- Operation: `ielts_dictation_search_materials`
- Category: 听力精听
- Endpoint: `POST /api/v1/agent/capabilities/ielts_dictation_search_materials`
- Authentication: Bearer Token（通过 /api/v1/agent-bindings 绑定账号）
- Required scopes: question_bank:read
- Side effect: read
- Human documentation: https://ieltsbuddy.igopx.cn/developers/api/ielts_dictation_search_materials

## Request parameters

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `difficulty` | string | 否 | Optional dictation difficulty filter. |
| `limit` | number | 否 | Maximum number of dictation-ready listening materials to return. |
| `offset` | number | 否 | Pagination offset returned by the preceding search. |
| `search` | string | 否 | Optional listening-material title keyword. |
| `tagQueries` | unknown[] | 否 | Literal user-mentioned taxonomy terms such as a topic, Cambridge book, test set, or Part label. |

## Request example

```bash
curl -X POST \
  'https://work.ieltsbuddy.igopx.cn/api/v1/agent/capabilities/ielts_dictation_search_materials' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer $IELTS_BUDDY_TOKEN' \
  --data '{"difficulty":"","limit":4,"offset":0,"search":"","tagQueries":[]}'
```

## Request schema

```json
{
  "type": "object",
  "properties": {
    "difficulty": {
      "default": "",
      "description": "Optional dictation difficulty filter.",
      "type": "string",
      "enum": [
        "",
        "基础",
        "核心",
        "冲刺"
      ]
    },
    "limit": {
      "default": 4,
      "description": "Maximum number of dictation-ready listening materials to return.",
      "type": "integer",
      "minimum": 1,
      "maximum": 6
    },
    "offset": {
      "default": 0,
      "description": "Pagination offset returned by the preceding search.",
      "type": "integer",
      "minimum": 0,
      "maximum": 100000
    },
    "search": {
      "default": "",
      "description": "Optional listening-material title keyword.",
      "type": "string"
    },
    "tagQueries": {
      "default": [],
      "description": "Literal user-mentioned taxonomy terms such as a topic, Cambridge book, test set, or Part label.",
      "maxItems": 6,
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1,
        "maxLength": 80
      }
    }
  },
  "required": [
    "difficulty",
    "limit",
    "offset",
    "search",
    "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 |