Can I use cURL in synchronous Object Event Handlers in a custom process?
Process Designer, Custom Process Model (CPM) / Service Process Model (SPM)
November 2012 version and newer
There are two types of Object Event Handlers in custom processes: Synchronous and Asynchronous.
cURL is not supported in Synchronous Object Event Handlers. This is due to the 5 second processing time limit for these event handlers. By nature an external network call may take more than 5 seconds to complete.