Get Domain Name from Participants Email

import groovy.json.JsonSlurper

//Set the base url of your jira instance
def baseUrl = '<JIRA_BASE_URL>'

//Specify the issue key
final def issueKey = '<ISSUE_KEY>'

final def restEndpointName = 'getParticipantsEmail'

def hostUrl = "${baseUrl}/rest/scriptrunner/latest/custom/${restEndpointName}?issueKey=${issueKey}"

def response = hostUrl.toURL().text

def json = new JsonSlurper().parseText(response)

def artifacts = json.collect().sort()

artifacts.each {
    log.warn "${it.toString().split('@').last()}"
}