Like many integrations, the main challenge is to get the credentials we need. Here are a few hints for Canada Post to let you know if you're looking at the right information, and how Canada Post needs to see that information from our system.
Here's the information we need entered into the integrations settings, which can be found in System > Shipping Setup > Integrated Services. Once there, click on the Edit button for Canada Post:
Canada Post uses the phrase "Key Number (Username : Password)". It may look something like this: oi905ckpcfcjsdn1:26lz7ch7u5leme3lkxzj5v. The string before the colon is 16 characters long, whereas the string after the colon is 22 characters.
The 16 character string is the username and lives in our User Name field. The 22 character string is the password and lives in our Password field. You will not enter the colon in our fields.
Your Customer Number may have leading zeros. You can enter in these leading zeros.
The End Point refers to their API URL, which may change over time. It is generally the same for all clients. As of this writing it is https://soa-gw.canadapost.ca/rs/ship/price.
Your Origin Zip is your postal code. The letters must be in uppercase and should not include any spaces.
Once you've entered in your settings, click Apply. Please be sure to test the configuration and make sure you're getting the correct rates.