From here you may access content on:

<ul>
    <li><b>cjdns</b> by going to <i>/gateway/cjdns/</i> followed by an address (ex. <a href="/gateway/cjdns/fc7d:5e80:f8bb:c92f:138a:0cbf:b181:7750">/gateway/cjdns/fc7d:5e80:f8bb:c92f:138a:0cbf:b181:7750</a>)</li>
    <li><b>Yggdrasil</b> by going to <i>/gateway/yggdrasil/</i> followed by an address (ex. <a href="/gateway/yggdrasil/203:e0b0:ec08:4e1f:f004:19a9:577a:90ba">/gateway/yggdrasil/203:e0b0:ec08:4e1f:f004:19a9:577a:90ba</a>)</li>
</ul>

Should you need to specify a port number, simply append it to the IPv6 address as if it was a nineth block (ex. fc0c:dc3b:942e:1fe2:5638:45bc:eebb:133f<b>:8080</b>) then followed by the path you want to request.