When sending chat messages via the API (POST

/v3/workspaces/{id}/chat/channels/{id}/messages), there is no way to

create native @mentions that trigger user notifications.

The @Name markdown format works correctly when

messages are sent from the ClickUp web UI, but when the same format is

sent via the API, it renders as a regular profile link (blue underline)

instead of a native mention tag (green highlight with notification).

We tested all available body parameters (content, tagged_users,

followers, assignee) and none of them produce native mentions.

Use case: We have an automated daily digest bot that posts team status

updates to product channels. We need to tag specific team members for

action items, but currently the bot cannot notify them.

Expected behavior: Either the @Name format should

work the same way via API as it does via the web UI, or a new body

parameter (e.g. mentioned_users) should be added to register mentions

when creating a message.