remote server machine, without an accessible operating system, is identified. A management computing system sends, to the remote server machine to be tested, a pre-installation environment image that has a pre-configured remote execution service disposed thereon. The pre-installation environment image is loaded into memory on the remote server machine to be tested and the remote execution service automatically runs and exposes an application programming interface (API). A client application on the management computing system interacts with the API to execute a debugging script on the remote server machine, and receives the result of the executed scripts through the API.