Reminds me of xmethods.net back in the day: <a href="http://web.archive.org/web/20020124061759/http://www.xmethods.net/" rel="nofollow">http://web.archive.org/web/20020124061759/http://www.xmethod...</a><p>When I saw that I knew APIs were going to be a thing. Wasn't in a position to capitalise on that belief.
Very nice. Also, check out <a href="https://github.com/public-apis/public-apis" rel="nofollow">https://github.com/public-apis/public-apis</a>. There might be some new ones to add.