# Rules timeline

Use rule timelines to maintain an audit trail of changes and activity for each rule.

## Retrieve rules engine timeline messages

 - [GET /events/{eventType}/timeline](https://www.rebilly.com/static/_spec/catalog/all-3.0/rules-timeline/getrulesetcollection.md): Retrieves a list of rules engine timeline messages.

## Create a rules engine timeline comment

 - [POST /events/{eventType}/timeline](https://www.rebilly.com/static/_spec/catalog/all-3.0/rules-timeline/postrulesettimeline.md): Creates a rules engine timeline comment.

## Retrieve a rules engine timeline message

 - [GET /events/{eventType}/timeline/{messageId}](https://www.rebilly.com/static/_spec/catalog/all-3.0/rules-timeline/getrulesettimeline.md): Retrieves a rules engine timeline message with a specified ID.

## Delete a rules engine timeline message

 - [DELETE /events/{eventType}/timeline/{messageId}](https://www.rebilly.com/static/_spec/catalog/all-3.0/rules-timeline/deleterulesettimeline.md): Deletes a rules engine timeline message with a specified ID.