Looks like the Great Firewall or something like it is preventing you from completely loading www.skritter.com because it is hosted on Google App Engine, which is periodically blocked. Try instead our mirror:

legacy.skritter.cn

This might also be caused by an internet filter, such as SafeEyes. If you have such a filter installed, try adding appspot.com to the list of allowed domains.

Proper Usage of this API

Feel free to use this API for personal use however you like. Just don't make calls excessively or that will put a strain on our servers, thanks!

We're still hashing out the terms for commercial use.