What type of webhook should a developer use to send an HTTP request when the workflow moves to the approved state?

To send an HTTP request when the workflow moves to the approved state, a developer should use a webhook that is designed specifically for tracking and responding to workflow actions. The submit action is relevant in this context because it signifies that the item in the workflow has reached a particular state, specifically the approval stage.

When an item is submitted for approval, it indicates that it has successfully passed through any prior states and is now pending approval or has been approved. This makes it an ideal trigger for sending an HTTP request, as it allows for integration with external systems or services at a critical point in the content lifecycle.

Approval actions are typically used for defining behavior relating to the approval process itself but do not directly relate to sending out notifications as this particular completion action occurs. Publish actions are more suitable for scenarios where content is made live but do not trigger at the workflow's approval state. Notification actions, while related to sending alerts or information, are generally not specific to the workflow's approval stage, focusing instead on communicating various messages rather than signaling a specific workflow transition.

Thus, the focus on the submit action aligns perfectly with the workflow transition to the approved state, enabling developers to automate processes and external communications effectively.