Cartloom can do the following (see below)
What would I need to do to accept it?
"Cartloom will POST a JSON formatted payload to whatever URL you provide. It is up to you what to do with that data.
I recommend setting up your remote script to accept the POST and dump it so you can see what you are working with.
For example in PHP, you could do this…
<?php // this will email you the dump of the POST mail( 'info@embertone.com', 'cart loom web hook data', print_r($_POST, true) ); ?>Web Hook setup is available in Checkout Settings -> General -> Hooks
Hope this helps. :)"