I am trying to figure out what the errors endpoint is used for, so I can I can implement it in my API.

I have been trying things like:

• http://api.stackoverflow.com/0.8/errors/404
• http://api.stackoverflow.com/0.8/errors/0
• http://api.stackoverflow.com/0.8/errors/1
• http://api.stackoverflow.com/0.8/errors/500

All the errors help page says is:

Summary
Simulates an error given a code

What are valid error codes? And, can we get some sort of response telling us that we supplied a bad error code?