I have one use case to call on-premise REST API via Cloud Connector. It is a custom API in SAP R/3 system. I checked with API developer and unfortunately they have no OpenAPI specification for it. Thus, I could not use OpenAPI generator to generate library.
Is there any other way to call on-premise REST API in such scenario like native call with connectivity service? We might have some more use cases with the same situation in future.
Is it possible to provide a generic REST client similar to OData?