Use this form to register your service callback URL. After you register a confirmation email will be sent to the address you provide. Any questions can be sent to
adeanhal@uwaterloo.ca. You will be able to delete your callback URL at any time.
Before registering your service you can check that it is producing valid responses with this script:
https://gist.github.com/akdh/564cbb5f9c6c92c99d8a