# Douyin Category Content Interaction Trend API

> Returns engagement rate trends over time for a specific Douyin content category between selected start and end dates.

Source: https://www.sandbase.ai/model/douyin/index/content-interact-trend
API reference: https://www.sandbase.ai/model/douyin/index/content-interact-trend/docs

## Facts

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

## Call it

`POST https://api.sandbase.ai/v1/api/douyin/index/content-interact-trend` with `Authorization: Bearer $SANDBASE_API_KEY` and the parameters as a JSON body.

| Parameter | Type | Required | Allowed values |
| --- | --- | --- | --- |
| `end_date` | string | yes |  |
| `start_date` | string | yes |  |
| `tag_id` | string | yes |  |

## FAQ

### How do I use the Douyin Category Content Interaction Trend API?

Send a POST request to https://api.sandbase.ai/v1/api/douyin/index/content-interact-trend 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 Douyin Category Content Interaction Trend 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 Douyin Category Content Interaction Trend API accept?

Required: end_date (string), start_date (string) and tag_id (string). The Parameters table and the Playground on this page list every field.

### What does the Douyin Category Content Interaction Trend 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 Douyin developer account or API key?

No. Douyin Category Content Interaction Trend 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 Douyin API access separately.

## README

### Douyin Category Content Interaction Trend API

Query user interaction rate trends for a specific Douyin category using `tag_id`, `start_date`, and `end_date`.

#### Use cases

- Track audience engagement rate changes across specific content categories over time.
- Analyze daily interaction metrics including likes, comments, shares, and favorites.
- Benchmark category performance between specific date ranges.

#### Request

```bash
curl -X POST "https://api.sandbase.ai/v1/api/douyin/index/content-interact-trend" \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"end_date": "20260414", "start_date": "20260314", "tag_id": "601"}'
```

#### Parameters

| Name | Type | Required | Description |
|---|---|---|---|
| `tag_id` | string | Yes | Category ID (required, does NOT support 0=all, must pass a specific category ID) |
| `end_date` | string | Yes | End date YYYYMMDD (inclusive) |
| `start_date` | string | Yes | Start date YYYYMMDD (inclusive) |

#### Example response

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

```json
{
  "interact_trend": {
    "rate_list": [
      {
        "date": "20260314",
        "rate": 0.02431060923716989
      }
    ]
  }
}
```

#### Notes

- `tag_id` requires a specific category ID and does not support 0 for all categories.
- Both `start_date` and `end_date` accept dates formatted as YYYYMMDD and are inclusive.

#### Related APIs

- [Douyin Index Area List](/model/douyin/index/all-area): Returns the complete list of supported geographic areas available for Douyin Index queries.
- [Douyin Index Valid Dates](/model/douyin/index/all-valid-date): Returns the latest valid dates available for each data type in Douyin Index.
- [Douyin Brand Popularity Cycles](/model/douyin/index/brand-cycles): Returns periodic brand popularity and cycle analysis data across platforms for a specified brand name and date range.