email.clicked
email.clicked fires when a recipient follows a tracked link, a far stronger engagement signal than an open. Bot and scanner hits are flagged.
A tracked link was clicked. A much stronger signal than an open. Requires click tracking on the domain, or on the send.
Payload
Every field, with an example body, is in the email.clicked reference, generated from the API contract.
Handling it
A click is a real human action in a way an open is not, so this is the event to attribute against. Security scanners do visit links before the recipient does, though — those arrive with bot: true, so attribute only the clicks where it is false. The reasons are the same as for email.opened.