title: Google Assistant API
body: <p>Is there some google assistant api guide or tutorial? I cannot find anything related by these keywords. There seems have some Android app integration guide, but I want to integrate with my cloud service, not android app.</p>
  
  <p>I find IFTTT have connected Google Assistant to several services, so I want to add some intents to my custom service.</p>
  
  <p>I have built an Alexa app by using Alexa Skill Kit to handle my customize intent, and want to find something similar in Google Assistant developer playground, but I have no clue.</p>
  
  <p>Thanks!</p>