This is the documentation for Cloud42.
If you are a developer and want to use the Web service interface of Cloud42, you can find the documentation of the Web service interface here,
including some sample SOAP messages.
Furthermore, you may be interested in Cloud42's notification mechanism that can be used to send notifications on events that occur on particular AMI instances to any endpoint by using a publish/subscribe pattern.
When working with the source code, the JavaDoc section provides helpful information.
The whole project documentation generated by Maven is available here.
Finally, if you want to get a deeper understanding of the why and how of Cloud42, you can also read the diploma thesis Cloud42 is based on. This is especially necessary if you want to delve into the architecture of Cloud42 and the used technologies.