Hello!
It is absolutely possible to make these connections as long as they support publishing REST webservices. I would review the type of connection needed as this is dependent on how the data source's REST API is configured. Usually it is a JSON format so I would review this video for [Importing a REST Web Services using Virtual Dataport](https://community.denodo.com/videos/details/Data%20Services/Denodo%208.0/Import%20a%20REST%20Web%20Services%20using%20Virtual%20DataPort).
There are a few sections in the user manual I would also look to depending on the connection needed. For example, if the API is configured to publish data in XML format, I would review the [XML Sources](https://community.denodo.com/docs/html/browse/8.0/en/vdp/administration/creating_data_sources_and_base_views/xml_sources/xml_sources) page for more information in setting up the data sources. Likewise, for more information on JSON formats like the one described in the video check here, [JSON Sources](https://community.denodo.com/docs/html/browse/8.0/en/vdp/administration/creating_data_sources_and_base_views/json_sources/json_sources). I know data stored in some SAP applications can be accessed using a BAPI format. The section titled [BAPI Sources](https://community.denodo.com/docs/html/browse/8.0/en/vdp/administration/creating_data_sources_and_base_views/bapi_sources/bapi_sources) has some good infromation and tips for making the most of that connection. A general list for all available sources can be found in the section titled [creating data sources and base views](https://community.denodo.com/docs/html/browse/8.0/en/vdp/administration/creating_data_sources_and_base_views/creating_data_sources_and_base_views).
I would also consider this similar question on how to [import data from API](https://community.denodo.com/answers/question/details?questionId=9064u000000CelAAAS&title=Import+data+from+API) with Workday as an example.
I hope this helps!
