Sometimes, API providers ask for API consumers to add different headers to requests to the same API endpoint, based on, for example, specific channels and/or scenarios. Currently, this not possible in Mendix to do dynamically. Once a (custom) header is configured, it is added to the request, even when it doesn't have a value.
I would like the 'Call REST Service' microflow activity to support dynamic custom headers, so I can configure the prerequisites for which header needs to be added and when, based on - for example - an expression.