To start using the what3words OpenCart Extension, first sign up to get your API Key.
The OpenCart Extension enables you to add a field to your checkout page that can accept 3 word addresses and provide AutoSuggest results as a user types.
Sign up to get get your free API key.
Download the OpenCart Extension here. Upload the file to your store within the OpenCart admin portal using the Extension Installer.
Once installed, “what3words” will appear under the “Modules” in the Module List. Enable the module and add your API Key for the field to appear on your checkout page.