Canada Post

1. To sign up to use Canada Post rate service send an email to sellonline@canadapost.ca

2. Simply request an account and they will set you up a test account. 

3. Be sure to ask to be moved to the live site once you get that information and explain to them that you are using a third party application that has already been tested. 

4. Login to your Canada Post account and be sure to setup boxes in the account setup area as you will need them in order to calculate fees.