Can I cache the JSON returned by an endpoint? Would like to not make the AJAX or API call repeatedly

Just adding I think luk answers this here (maybe) 
https://community.khoros.com/t5/Developer-Discussion/Advice-on-performance-for-external-API-query/m-p/208835/highlight/true#M9494

How I resolved this with a little input from here and elsewhere. I have always found the appcache confusing so I needed some help. Thanks.

<#if page.context?? && page.context.message??>
  <#assign myKey = "myKey_"+page.context.message.uniqueId />
<#else>
  <#assign myKey = "xyz" />
</#if>
<#if appcache.get("myKey", "--EMPTY--") == "--EMPTY--">
  <#assign apiURL = "https://stage.apiurl.com/api/id/A1B2C3d4" />

  <#assign apiResponse = http.client.request("https","stage.apiurl.com","/api/id/A1B2C3d4")
  .header("authorization", "APIKey whateveryourA4IK3Yis" )
  .header("content-type", "application/json;charset=UTF-8" )
  </>

  <#assign apiResponse = apiResponse.post() />
  <#assign content = apiResponse.content />
  ${appcache.put("myKey", content)}
  ${content} 
<#else>
  ${appcache.get("myKey")}
</#if>