Hi @igschloessl,
@igschloessl you can use SPLUNK REST API /data/ui/views
to pull the dashboard list. Refer to documentation https://docs.splunk.com/Documentation/Splunk/latest/RESTREF/RESTknowledge#data.2Fui.2Fviews
You can add User and App context and other required search filters to pin-point to specific dashboards that you need. Refer to one of my older answers on similar lines https://answers.splunk.com/answers/662598/can-you-find-a-way-to-see-if-a-report-is-attached.html
| rest /servicesNS/-/-/data/ui/views/
The hyphen ( -
) in the REST URI above are for any user context or any app context.