How does Drupal plugin work?
Metals API is a Drupal module that consumes, caches and produces blocks to display precious metal prices from our API. In order to use the Metals API module, install the module following Standard Drupal module installation practices. More information is included in the README.txt file. Once the module is installed, navigate to the Metals API Integration Settings page from the Configuration -> Web Services menu item and paste your Metals API Key in the provided field. The module is configured to refresh the feed at a rate of once every 24 hours. You can adjust that to whatever rate you feel is necessary, provided that your Metals API Account allows for it.