In one example in accordance with the present disclosure, a system for replicating a web technology identifies asynchronous scripting code within isolated scripting code of the web technology. The isolated scripting code is part of larger client-side code of the web technology. The system executes the asynchronous scripting code to cause a request to be sent to a remote server and records the request. The system listens for return data received from the remote server in response to the request and saves the return data. The system generates mock server-side code based on the request and the return data.