Abstract: Systems and methods of executing multiple scripts at an extension point are provided. If there are multiple scripts that are associated with an extension point for a service instance in a SAAS platform, a script execution schedule is determined. This can indicate the order of execution of the multiple scripts, but may also specify how the inputs and outputs of the multiple script executions are obtained. For example, the inputs for multiple scripts can be the same, and be those provided by the SAAS platform at the extension point. In this case, in effect the multiple scripts are executed independently. Alternatively, the output of one script can function as the input to another script, which requires a certain order of execution. After all of the scripts are executed, output rules are used to determine an overall output of the script execution to be returned the platform through the extension point.