Vanity Widget
PUQ Web Hosting module WHMCS
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Settings → Vanity widget generates a standalone "claim your name" landing page (two files) that you can drop on any marketing domain to sell vanity slots outside the WHMCS portal.
In short, you: (1) get/regenerate a shared API key, (2) pick the vanity product, (3) copy the config block into proxy.php, (4) choose the cart behaviour, then download proxy.php + index.html and upload both to each marketing domain's web root.
The browser only ever talks to the widget's own proxy.php (which holds the key and caches answers) — the key never reaches the visitor.
The full setup, the buyer's flow and the security model are documented in the dedicated Vanity Mode → The vanity shop widget page.