RxSession is a Swift Package and a CocoaPod that integrates Endpoints with RxSwift.
It adds a start(call:) function to Session that return a Single that can be used instead of the completion handler of Session.dataTask(for:completion:).
struct CustomCall: Call { ... }
let client = AnyClient(baseURL: ...)
let session = Session(with: client)
session.start(call: CustomCall())
// rx-Chain