---
title: "蒲公英关键词关联词（选题扩词）/PGY related keywords"
method: POST
path: "/api/v1/xiaohongshu/pgy/get_keyword_related"
tags: ["Xiaohongshu-PGY-API"]
---

# 蒲公英关键词关联词（选题扩词）/PGY related keywords

`POST /api/v1/xiaohongshu/pgy/get_keyword_related`

## Request

- Base URL: `https://api.tikhub.io` (the document declares no server; this is the origin it was published from)
- URL: `https://api.tikhub.io/api/v1/xiaohongshu/pgy/get_keyword_related`
- Auth: HTTP bearer

# [中文]
### 用途:
- 返回用户搜这个词**之前**和**之后**还会搜什么，对应内容广场的「相关灵感」卡片
- 典型用法是选题扩词：拿一个核心词跑出一批关联词，再用 `/get_keyword_stat` 逐个比热度，
  挑出竞争小但搜索量不低的词
### 请求体参数:
- search_word: 关键词，如 "面膜"
### 返回:
- `upSearchWords[]`（上游词）与 `downSearchWords[]`（下游词）
- 每个词自带 `searchScore` 搜索指数、`readTotalCount` 阅读总量、`noteNum` 笔记数、
  `relevanceRank` 相关度排名、`brandTag` 是否品牌词

### 响应结构（取数要剥两层）:
- `resp["data"]` 是蒲公英原样信封（含 `code`/`msg`/`success`），业务数据还在它里面一层
- 正确取法：`data = resp["data"]["data"]`；下面「返回」列的字段都在这一层下
### 计费:
- HTTP 200 → **计费**。包含「查无结果」（`data` 为 null，如 ID 不存在或筛选无命中）——
  请求已送达蒲公英，同样扣费，不要因为拿不到数据就重试
- HTTP 400 → 不计费（参数格式非法，或上游资源不足/异常）

# [English]
### Purpose:
- What users search **before** and **after** this keyword ("Related Inspiration" card)
- Typical use: expand one seed keyword into a candidate list, then compare each with
  `/get_keyword_stat` to find low-competition but decent-volume terms
### Request Body Parameters:
- search_word: keyword, e.g. "面膜"
### Return:
- `upSearchWords[]` (upstream terms) and `downSearchWords[]` (downstream terms)
- Each term carries `searchScore`, `readTotalCount`, `noteNum`, `relevanceRank`, `brandTag`

### Response shape (two layers):
- `resp["data"]` is PGY's raw envelope (with `code`/`msg`/`success`); the payload is one level deeper
- Correct access: `data = resp["data"]["data"]` — every field listed under "Return" lives here
### Billing:
- HTTP 200 → **charged**, including "no result" (`data` is null, e.g. ID not found or filters matched
  nothing): the request did reach PGY, so retrying on empty data just burns quota
- HTTP 400 → not charged (malformed params, or upstream unavailable/error)

# [示例/Example]
```json
{"search_word": "面膜"}
```

返回的 `upSearchWords[]`（上游词）与 `downSearchWords[]`（下游词）就是扩词的种子，
拿去逐个跑 `/get_keyword_stat` 比热度，挑竞争小的。

`upSearchWords[]` / `downSearchWords[]` are your expansion seeds — score them with
`/get_keyword_stat`.

## Request body

- KeywordReq
  - `search_word` string, required: 关键词，如 面膜/Keyword

## Response `200`

Successful Response

- ResponseModel
  - `code` integer: HTTP status code | HTTP状态码
  - `request_id` string, nullable: Unique request identifier | 唯一请求标识符
  - `message` string: Response message (EN-US) | 响应消息 (English)
  - `message_zh` string: Response message (ZH-CN) | 响应消息 (中文)
  - `support` string: Support message | 支持消息
  - `time` string: The time the response was generated | 生成响应的时间
  - `time_stamp` integer: The timestamp the response was generated | 生成响应的时间戳
  - `time_zone` string: The timezone of the response time | 响应时间的时区
  - `docs` string, nullable: Link to the API Swagger documentation for this endpoint | 此端点的 API Swagger 文档链接
  - `cache_message` string, nullable: Cache message (EN-US) | 缓存消息 (English)
  - `cache_message_zh` string, nullable: Cache message (ZH-CN) | 缓存消息 (中文)
  - `cache_url` string, nullable: The URL to access the cached result | 访问缓存结果的 URL
  - `router` string: The endpoint that generated this response | 生成此响应的端点
  - `params` unknown
  - `data` unknown

## Other responses

- `422`: Validation Error

## Changes

- **2026-10-08** `96a122a5f220`: 2 info
  - added the optional property `detail/items/ctx` to the response with the `422` status
  - added the optional property `detail/items/input` to the response with the `422` status
- **2026-09-01** `50f9ec6e1cd3`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/tikhub/apis/tikhub-douyin-tiktok-xiaohongshu-lemon8-bilibili-kuaishou-pi/changes/api/v1/xiaohongshu/pgy/get_keyword_related/post.md)

---

[API](https://skmtc.dev/tikhub/apis/tikhub-douyin-tiktok-xiaohongshu-lemon8-bilibili-kuaishou-pi.md) - [All operations](https://skmtc.dev/tikhub/apis/tikhub-douyin-tiktok-xiaohongshu-lemon8-bilibili-kuaishou-pi/llms.txt) - [OpenAPI document](https://skmtc.dev/tikhub/apis/tikhub-douyin-tiktok-xiaohongshu-lemon8-bilibili-kuaishou-pi/revisions/86a3483c705a?raw)