> ## Documentation Index
> Fetch the complete documentation index at: https://www.plain.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Note mention created

> Fired when a note on a thread mentions a machine user.

This event is fired when a note mentions a machine user, such as an [agent](/docs/agents) you built. It also fires when a user edits a note and adds a mention. `mentions` lists the machine users mentioned. Mentions of users stay as `<@u_…>` tokens in `note.markdown` and don't fire this event.

## Schema

[**View JSON Schema →**](https://core-api.uk.plain.com/webhooks/schema/latest.json)

Example:

<Snippet file="webhooks/thread-note-mention-created.mdx" />

<Snippet file="webhooks/sdk-usage.mdx" />