What WordPress setup does the BytePhase Connector need, and will it slow my site down?

The plugin needs WordPress 6.0 or later and PHP 8.1 or later. On normal pages it loads nothing; on a page with a built-in form it loads one small stylesheet, and submissions are forwarded server-side. It works with caching plugins, and submissions themselves are never cached. Background retries run on WP-Cron, so make sure WP-Cron runs on your host.