Hi @lcdelgado
Please select the text between '%7B' & '%7D' as the list id (highlighted below in red color):
_layouts/15/listedit.aspx?List=%7B2adf671b-5072-4412-a71a-e7e312d81b25%7D
in the above example, the list id is 2adf671b-5072-4412-a71a-e7e312d81b25
Pls extract the list id using the above instructions and pass it to the "Send an HTTP request to SharePoint" action.
If this helps & solves your problem, please remember to give a 👍 and accept my solution as it will help others in the future.
Thanks