@IanAtJMP  - Ok. Good to know that you want your endpoint to return JSON which than can be requested by your components. You could use something like this to build your endpoint:   <#attempt> <#assign someLabels = restadmin("/categories/id/discovery/labels? restapi.response_format=json").labels.label /> <#if someLabels?? && someLabels?size gt 0> { "response": { "status": "successful", "labels" : [ <#list someLabels as label> "${label.text}"<#if (label?has_next)>, </#list> ] } } <#else> { "response": { "status": "empty" } } <#recover> { "response": { "status": "error", "message": "${.error?json_string}", "query" : "${queryMsg?json_string}" } }     This should always return a JSON object from your endpoint. You should test your endpoint by directly accessing its Url, to see if things work as expected. ... View more