Installation document for Royal Mail Click and Drop API for Opencart 3.x
Requirements
Please make sure you have set the correct permissions for the software as in the list below.
Administrator permission for OCMOD(How to use OCMOD Opencart ?) | Important |
1. Upload
Method 1: Directly upload from only one xxx.ocmod.zip file
Notice: You must extract downloaded zip file to get the installation file. File name must have the extension [extension] OC v*.* - v*.*.ocmod.zip,
so you should not change the file name under any circumstances.
Firstly, go to your Opencart admin panel -> Extensions -> Extension installer -> Upload your file -> Continue
Method 2: https://mmosolution.com/blogs/how-to-use-ocmod-opencart-by-FTP-without-extension-installer.html
Secondly, you should go to Modifications -> Click refresh and clear buttons as per image below:
2. Installation
Go to Extensions → choose type -> module as image 3

then Find [extension] and click install as image 3.1
3. Configuration
Congratulations!
[extension] is now installed and configured. You can access it from Extensions > type Module > [extension] then click [ Edit ]
In there you can see a link for get Royalmail API