I was able to read the headers during handshake by doing the following: connection.stateUpdateHandler = { newState in switch newState { case .ready: if let metadata = connection.metadata(definition: NWProtocolWebSocket.definition) as? NWProtocolWebSocket.Metadata, let headers = metadata.additionalServerHeaders { } } Hope it helps

I was able to read the headers by doing the following: connection.stateUpdateHandler = { newState in switch newState { case .ready: if let metadata = connection.metadata(definition: NWProtocolWebSocket.definition) as? NWProtocolWebSocket.Metadata, let additionalServerHeaders = metadata.additionalServerHeaders { } } } Hope this helps

Thanks for the quick reply! I’ve filed a report with an Xcode project attached and included reproduction steps. Feedback ID: FB20104294

FB20929670 Thanks!