Create Dynamic links using Bit.ly API in Marketing Cloud SMS Send, with AMPScript and Guide Template Language

SMSDynamicBitlyLink.js

%%[
  var @cloudpage, @link, @param, @bitlyPage, @contentType, @content,
      @bitlyToken, @additionalHeaderName, @additionalHeaderValue, @request, @response,
      @message
  
  set @bitlyToken = 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXX' // Your bitly Token
  set @bitlyPage = 'https://api-ssl.bitly.com/v4/bitlinks'
  set @contentType = 'application/json'
  set @additionalHeaderName = 'Authorization'
  set @additionalHeaderValue = concat('Bearer ', @bitlyToken)

  set @param = AttributeValue('Id'); // Or Any Attribute
  set @cloudpage = 'https://yourdomain.com/something'
  set @link = concat(@cloudpage, '?yourparam=', @param)

  set @content = concat('{"long_url": "',@link,'"}')
  
  set @request = HTTPPost(@bitlyPage, @contentType, @content, @response, 
    @additionalHeaderName, @additionalHeaderValue)

  set @message = 'Hello, this is my link :'
]%%%%=v(@message)=%%{{.datasource response type=variable}}{{.data}}{ "target" : "@response" }{{/data}}{{link}}{{/datasource}}