GET /v1/douyin/index/fetch_content_publish_trend
Content publish trend
stable · 2 credits per success
Get the content publish volume trend over time for a category；Helps understand content supply heat changes for a category；tag_id: Category ID (**required, does NOT support 0=all**, must pass a specific category ID)；start_date: Start date YYYYMMDD (inclusive)；end_date: End date YYYYMMDD (inclusive)；Daily aggregated publish volume (date + count of items published that day)
Request parameters
| Name | Type | In | Required | Description | Example |
|---|---|---|---|---|---|
| tag_id | string | query | yes | 垂类ID，**必填，不支持 0=全部**（同 fetch_item_query 的 category_id 但不接受 0） | 601 |
| end_date | string | query | yes | 结束日期 | 20260414 |
| start_date | string | query | yes | 开始日期 | 20260314 |
Response fields
Field dictionary coming soon — the executable panel shows the live shape.
Errors
| code | HTTP | Meaning | Billed |
|---|---|---|---|
| 40001 | 400 | Invalid parameters | no |
| 40102 | 401 | Invalid or revoked API Key | no |
| 40201 | 402 | Insufficient credits | no |
| 40402 | 404 | Resource not found | no |
| 42201 | 422 | Quality gate failed | no |
| 42901 | 429 | Rate limit exceeded | no |
| 50401 | 504 | Upstream timeout | no |
| 50201 | 502 | Upstream error | no |
Billing
Success costs 2 credits. Any failure — including a 200 from upstream that fails the quality gate — costs 0.