To install an Agent on your website using the Standard widget use the following code snippet: 
<script type="module">
  import Chatbox from 'https://cdn.mu.chat/embeds/dist/chatbox/index.js?v=2';

  Chatbox.initStandard({
    agentId: 'YOUR_AGENT_ID',
  });
</script>

<muchat-chatbox-standard />
Replace YOUR_AGENT_ID with the ID of your Agent
You can find the Agent ID in the Agent settings under the Settings tab.
See all the available attributes in the Chatbot Reference.