1. In DataFast, open Website settings → API and create a website API key (it starts with df_).
2. In Geodify, open your site → Sharing & settings → Import history → DataFast, paste the key and pick the date range.

Daily visitors, pageviews, sessions and revenue, plus pages, referrers, countries, devices, browsers, operating systems and campaigns, month by month. The key is used once and never stored. Past referrers are re-read, so old visits from ChatGPT or Perplexity show up as AI traffic, often for the first time.

<button data-fast-goal="signup">  ·  window.datafast("signup")

Both keep working with Radar unchanged: the script understands data-fast-goal and datafast() calls.

Keep your checkout code. Radar sets the same datafast_visitor_id cookie (plus its own radar_visitor_id), and reads either from Stripe, Dodo or Polar checkout metadata. Connect your provider under Sharing & settings → Revenue: paste one webhook URL and its signing secret. Payments, renewals and refunds are credited to the buyer's first visit, down to the AI engine or the post link that sold it.

When the numbers line up, delete the old tag:

<script defer data-website-id="…" data-domain="…" src="https://datafa.st/js/script.js"></script>