Hi Lyndon
Exactly I think so.
In the first place,I misunderstood existing API's docs.
Becuse we get endpoint URL include "/rest".
http://developers.marketo.com/documentation/rest/endpoint-url/
But API docs include /rest as you wrote.
/rest/v1/lists/{id}.json
In march release,I replaced /rest to /asset in my brain.
URL: <REST API Endpoint URL>/asset/v1/emailTemplate/{id}/contentThis is correct format for new developers, but ...confuuuuuse!