Each API call requires an apiKey. In order to generate an apiKey, ARI will need to enable the API feature for your DMRT application. After ARI enables this functionality, you should be able to log into DMRT and see an API Admin link under your settings:
Once on this page, you should be able to generate any number of API Keys for your application. The application allows you to add notes to the API keys. Any of these keys can be used for the API calls outlined in this document as long as you are an authorized client for the API calls. You can also delete keys which become compromised or are no longer in use. These will be wiped completely from the system and cannot be retrieved.