The Act-On Custom Facts and Events Curl Sample Code demonstrates how to you to add a new custom event into the account. Parameters include destination, field separator, custom event action, email, title, and date format.
For any business or website that relies on user or customer interaction, communication is important, and often the only point of contact a business may have with that customer is an email address. This is where email validation can lend a helping hand; as long as mail can be successfully sent to an address all is good, but if there's some issue causing failed delivery and other errors, better to know about it. Email Pie is a free, JSON API that provides a simple way to validate email addresses.