# Zhihu Topic Search (V3) API

> Searches Zhihu topics by keyword and returns matching topic profiles, follower metrics, and highlighted text matches with pagination support.

Source: https://www.sandbase.ai/model/zhihu/web/topic-search-v3
API reference: https://www.sandbase.ai/model/zhihu/web/topic-search-v3/docs

## Facts

- Provider: Zhihu
- Type: Data API
- Endpoint: `POST https://api.sandbase.ai/v1/api/zhihu/web/topic-search-v3`
- Price: $0.0015 per call
- Free allowance: 100 calls per organization per UTC day, shared across eligible APIs
- Capabilities: api, zhihu
- Billing: pay per use from one SandBase balance; no provider account or subscription needed

## Call it

`POST https://api.sandbase.ai/v1/api/zhihu/web/topic-search-v3` with `Authorization: Bearer $SANDBASE_API_KEY` and the parameters as a JSON body.

| Parameter | Type | Required | Allowed values |
| --- | --- | --- | --- |
| `keyword` | string | yes |  |
| `limit` | string | no |  |
| `offset` | string | no |  |

## FAQ

### How do I use the Zhihu Topic Search (V3) API?

Send a POST request to https://api.sandbase.ai/v1/api/zhihu/web/topic-search-v3 with your SandBase API key in the Authorization header (Bearer) and the parameters as a JSON body. You can also try it in the Playground on this page without writing code.

### How much does the Zhihu Topic Search (V3) API cost?

$0.0015 per call. Every organization gets 100 free calls per UTC day, shared across eligible SandBase APIs including this one; after that each call is billed at this price from your SandBase balance. There is no subscription.

### What parameters does the Zhihu Topic Search (V3) API accept?

Required: keyword (string). Optional: limit (string) and offset (string). The Parameters table and the Playground on this page list every field.

### What does the Zhihu Topic Search (V3) API return?

A JSON response returned in the same HTTP request (synchronous). The README on this page includes a sample response.

### Do I need a Zhihu developer account or API key?

No. Zhihu Topic Search (V3) runs through SandBase, so one SandBase API key covers this endpoint and every other API and model in the catalog. You do not need to apply for Zhihu API access separately.

## README

### Zhihu Topic Search (V3) API

Query Zhihu topics matching a search term using the `keyword` parameter. It returns topic metadata including follower counts, descriptions, and topic identifiers.

#### Use cases

- Discover relevant Zhihu topic identifiers for specific subject keywords.
- Inspect follower statistics and descriptions across matching Zhihu topics.
- Track topic visibility and audience interest on Zhihu.

#### Request

```bash
curl -X POST "https://api.sandbase.ai/v1/api/zhihu/web/topic-search-v3" \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"keyword": "OpenAI"}'
```

#### Parameters

| Name | Type | Required | Description |
|---|---|---|---|
| `keyword` | string | Yes | Search Keywords |
| `limit` | string | No | Number of topics per page |
| `offset` | string | No | Offset |

#### Example response

Real response for the request above, trimmed to the main fields. User names and long IDs are masked.

```json
{
  "data": [
    {
      "id": "20083046",
      "type": "search_result",
      "highlight": {
        "description": "由 Elon Musk, Peter Thiel, Sam Altman",
        "title": "OpenAI"
      },
      "object": {
        "agreed_count": 0,
        "description": "由 Elon Musk, Peter Thiel, Sam Altman",
        "follower_count": 6548,
        "followers_count": 6548,
        "id": "20083046",
        "name": "OpenAI"
      }
    }
  ]
}
```

#### Notes

- Supports pagination via the optional `limit` and `offset` parameters.
- The `keyword` parameter is required to perform the search.

#### Related APIs

- [Zhihu AI Search Stream](/model/zhihu/web/ai-search-stream): Returns streaming AI search results from Zhihu based on a query prompt.
- [Zhihu Answer Details](/model/zhihu/web/answer-detail): Retrieves detailed information for a specific Zhihu answer using its numeric ID, including answer text, timestamps, and share links.
- [Zhihu Article Search](/model/zhihu/web/article-search-v3): Search Zhihu articles and answers by keyword and get titles, excerpts, authors, vote and comment counts, with sorting, content type and time filters plus offse…