Currently, there is no well-documented official API endpoint specifically for exporting Usage Tags of a survey in platforms like Qualtrics. However you can custom Scripting for Tag Management. 

For example: Using Web Scraping or Automation: You can use tools like Selenium or BeautifulSoup to automate interactions with the Qualtrics admin interface. This could involve logging in, navigating to the Usage Tags section, and extracting or applying tags manually. 

I see some same problem here, you can check this: Changing usage tags via the API | XM Community 

We all know that UsageTags, as defined by Qualtrics, serve a critical administrative function, enabling cost management by tagging surveys and users. So I think it is about security problem.