Is there a service to disable/enable a trigger?
There is a way, but… you will have to write a Java service for that. You can use the Trigger class to set the ProcessingState of a trigger. But before you start fiddling at that level, make sure you really, really need to Can you explain the context of your request? There might be other ways.
In 6.1 there are services for disabling/enabling triggers at runtime.You can use them if you are using 6.1.For that you will need to get IS_6-1_Fix22 from webmethods.
There are services in pub.trigger to suspend/resume retrieval/processing. There are however no built-in services to disable/enable a trigger.