I would like to know is there any possibility to disable the button in the list widget based on the URL parameter . it is quite possible with customized list widget and can be validated against it. i just wanted to know the options without customization.
As far as I understand, it is not possible without customization to disable a List widget button based on a URL parameter.
As a workaround, you can use the URL parameter to filter the list data so the button only appears for allowed records.
For true button-level enable/disable logic based on URL parameters, a custom widget or Developer Edition customization would be the reliable option.