Connecting Opencart to Postmen
This guide teaches you how to connect your Opencart store to Postmen. You can import orders to Postmen to print labels, calculate rates and manifest.
Login to your Postmen Account
Click on Apps tab > Select Opencart button if there are no apps connected > If you can see a list of apps already connected, click on the connect new app button > Select opencart button
Input your store URL, without the prefix http:// & https:// then click connect button

Status should display connected

Login to Opencart admin panel.
Download version 2.x.x
Ensure you have FTP enabled on your server. click here on how to enable FTP on your server.
Ensure the FTP user has the correct permissions to read/write the OpenCart directories.
For proper FTP usage, it is recommended to install QuickFix
Go to Extensions > Extension Installer
Select the respective zip file and click continue
Go to Extensions > Select from drop down Extension type- Modules You should see an entry for this Postmen-Connector
From the action menu click install, Wait for installation to complete
Once the connector is installed, Click edit option from the action menu, Enter your Postmen API key and enable the connector to complete the process.
If you don't have it installed, install the Vqmod version for Opencart: > You can download the Opencart version from here and the instructions to install here. To check that the installation was successful you can look in the folder app/vqmod/vqcache, if there are files the installation was successful.
Download version 1.5.x
Unzip the files and Upload files of Upload folder to base/root of opencart directory (htdocs). Choose overwrite option if folders already exist in the directory
Log into the Opencart Admin panel,
Go to Extensions > Modules You should see an entry for this Postmen-Connector.
From the action menu click install, wait for installation to complete.
Once the connector is installed, Click edit option from the action menu, Enter your Postmen API key and enable the connector to complete the process.
Firstly, you have to ensure that you have a shipper account
After you have a shipper account, click on developers > select API key

When you see the below error message, this means that you have another postmen account that your app is connected to.

Login to your other postmen account and disconnect the respective app by clicking on the x in the image below

How to install Opencart Postmen app
Login to your Postmen Account
Click on Apps tab > Select Opencart button if there are no apps connected > If you can see a list of apps already connected, click on the connect new app button > Select opencart button
Input your store URL, without the prefix http:// & https:// then click connect button

Status should display connected

Installation for OpenCart Extension Version 2.x.x
Login to Opencart admin panel.
Download version 2.x.x
Ensure you have FTP enabled on your server. click here on how to enable FTP on your server.
Ensure the FTP user has the correct permissions to read/write the OpenCart directories.
For proper FTP usage, it is recommended to install QuickFix
Go to Extensions > Extension Installer
Select the respective zip file and click continue
Go to Extensions > Select from drop down Extension type- Modules You should see an entry for this Postmen-Connector
From the action menu click install, Wait for installation to complete
Once the connector is installed, Click edit option from the action menu, Enter your Postmen API key and enable the connector to complete the process.
Installation for OpenCart Extension Version 1.5.x
If you don't have it installed, install the Vqmod version for Opencart: > You can download the Opencart version from here and the instructions to install here. To check that the installation was successful you can look in the folder app/vqmod/vqcache, if there are files the installation was successful.
Download version 1.5.x
Unzip the files and Upload files of Upload folder to base/root of opencart directory (htdocs). Choose overwrite option if folders already exist in the directory
Log into the Opencart Admin panel,
Go to Extensions > Modules You should see an entry for this Postmen-Connector.
From the action menu click install, wait for installation to complete.
Once the connector is installed, Click edit option from the action menu, Enter your Postmen API key and enable the connector to complete the process.
How to find your Postmen API key?
Firstly, you have to ensure that you have a shipper account
After you have a shipper account, click on developers > select API key

Store already exist in another Postmen account
When you see the below error message, this means that you have another postmen account that your app is connected to.

Login to your other postmen account and disconnect the respective app by clicking on the x in the image below

Updated on: 01/06/2022
Thank you!