We have built Pagerly which updates the Slack user group (like @sre-oncall) with your Oncall schedule and your current oncall. You can also receieve Instant Notification on Oncall Rotation/Handover Start tagging oncall like @dev-on-call, Have Automated Response for Each Oncall Mention To Free Developer Time In short one can Manage Rotations, override, notify, and engage oncalls via Slack