What is sec_uid on Douyin, and how is it different from uid and the Douyin ID?
sec_uid is the long ID starting with MS4wLjABAAAA in a Douyin profile link, which DataXAPI's account endpoints take. uid is the account's numeric ID, which the trend-index (巨量算数) endpoints take. The Douyin ID (抖音号) is the handle the user picks and can change. DataXAPI reads Douyin with 36 endpoints, from $0.0020 a call; a failed call is not charged.
Three IDs of one account
A profile's web link is https://www.douyin.com/user/<sec_uid>. As public open-source tools describe it, sec_uid is the stable key of an author, and the Douyin ID, the field unique_id, is never used as a key because users can change it.
| ID | Looks like (made up) | In DataXAPI |
|---|---|---|
sec_uid | MS4wLjABAAAAexampleexampleexample | id of douyin.users.get and douyin.users.videos.list; returned as the account's id |
uid | A string of digits | id of douyin.index.creators.metrics and douyin.users.history; ext.uid of a Xingtu creator |
| Douyin ID (抖音号) | Letters and digits the user picks | Returned as username; not taken as an input |
How to go from one to another
With a profile link, give it to douyin.users.get as url: the answer's id is the sec_uid, and username is the Douyin ID. Where the user has picked none, username is the number Douyin assigned.
For a creator on Xingtu, douyin.xingtu.creators.get with one Xingtu creator ID returns all three: account_id is the sec_uid, username the Douyin ID, and ext.uid the numeric ID, in the full view. The Xingtu creator ID itself is a fourth number, not the Douyin account's.
Endpoints
Each with its price; every page has the parameters, the fields and a recorded response.
Sources
What this page says of other services is from their own pages and documents, read on 2026-10-29. Prices and features change: check the source before you decide.