It's the very last link in the sticky at the top of the subreddit. I couldn't't use correct syntax for it, because the Reddit spam filter takes out posts and comments containing the proper link.

If you visit the link with a regular web browser, you just get a 404 error. It's only of use to programmers using the Reddit API.

Post removed and user account suspended. Anyone know the site?

/u/dom96 has built a free API, compatible with the official Reddit API, that covers the majority of the read-only API endpoints