benecaster_get_feed_url()

Builds one subscriber’s private feed URL for one show, from a token you already hold. The URL carries that token, so it is personal to them — it belongs in their email and on their own account screen, and nowhere a different visitor could read it.

Use this rather than assembling the URL yourself. The format has changed before and this function is what absorbs the next change. It is also the single place the benecaster_token_url filter is applied, so a hand-built URL silently opts out of any add-on that rewrites feed URLs to pretty permalinks.