1. A method comprising: intercepting, at an intermediary manager from a guest operating system located at the same machine as the intermediary manager, a hypercall directed to a particular hypervisor that is separate from the intermediary manager, wherein the intermediary manager is not the particular hypervisor; determining that a particular intermediary service is associated with the hypercall; causing execution of service instructions associated with the particular intermediary service; wherein the method is performed by one or more computing devices.