Marketo provide an interface within their system that allows you to call Webhooks to enrich data within their system.

Read the Marketo Documentation for Webhooks here.

You can use the response mappings to enrich your Marketo data with BuiltWith technology data by using our Marketo Domain Lookup endpoint –

https://api.builtwith.com/marketo2/api.xml?KEY=[YOUR API KEY]&LOOKUP=zulily.com

You can get an API key at http://api.builtwith.com when logged in.