At the moment, Zapier doesn’t offer a fully public API to retrieve a complete list of all its integrations (apps) unless you’re a published developer with access to their Partner API. That access typically requires submitting and publishing your own app through their developer platform.

If you're not a published partner, here are a few alternative approaches you might consider:

1. Scraping the App Directory (Use with Caution):
   Zapier’s app directory is publicly visible in the browser, and while there's no official API, you could technically write a script to scrape app names and details. Just be aware that automated scraping may go against Zapier’s terms of service, so this method should be used responsibly and in moderation.

2. Using Publicly Available Site Data:
   Zapier exposes app data through structured web content, which may include sitemaps or other indexed pages that can be parsed. While it’s not a clean API, it can serve as a workaround if you need basic app names or URLs.

3. Browser Automation Tools:
   If scraping isn't ideal, tools like Puppeteer or Selenium can be used to simulate user browsing and extract app information in a more controlled manner. This is often used in academic or market research contexts when APIs aren't available.

4. Contacting Zapier Directly:
   If you’re conducting a legitimate study, especially for academic or research purposes, consider reaching out to Zapier's support or partnerships team. They might be willing to share data or provide temporary access depending on your use case.