import Nuntly from '@nuntly/sdk';

const client = new Nuntly({
  apiKey: process.env['NUNTLY_API_KEY'], // This is the default and can be omitted
});

const messageContent = await client.messages.content.retrieve('imsg_01kabn43yqyxn2bx4ve84mczd3');

console.log(messageContent.htmlUrl);

{
  "data": {
    "textUrl": "<string>",
    "htmlUrl": "<string>",
    "mimeUrl": "<string>"
  }
}