Zucando's Advanced Canada Post: https://zucando.com/zen-cart-modules...ed-canada-post Seems to be working fine, but it's only been a couple of days and coincidentally most of my customers have been either Lettermail or free shipping so I haven't used it much. A couple of important notes: read the readme that comes with the module (html file in docs unhelpfully labelled "index.html"). And the customer has to be enrolled in the CP Developers Program because the username & password asked for in the module during setup is from the production API keys, it is NOT the username & pass from their CP account.

Do this:
- go to Developer Program portal page (https://www.canadapost.ca/cpc/en/bus...ate-apis.page?)
- Click "Go To Developer Program" button & log in as your customer if they are signed up, or sign them up if they're not already
- find the table with the API Keys (link is in left hand menu, 3rd from bottom)
- copy Production username and password from the table shown and paste them into the setup panel in the module (they are separated by a colon in the API keys table)

The installation instructions with the module are not as comprehensive as they should be (ha ha! understatement) and it took me a while to figure out the username & password thing. There might be another decent CP module out there? I dunno, I didn't look too hard as I was in a hurry to get my shipping back up & running. Looking back upthread there've been folks that haven't been able to get it to work for them, but the version I've installed in my shop (currently running v.1.5.5f) seems to be ok so far.