I am progressing slowly with my boting project because most of the time i spend using trial and error to discover what the engine can read out and where i can get certain information. is there a reference i where i can see what data the engine is capable to provide?

yes, download sanderling (not abot) run it → and on the developer tab you can see all actual readings from given process categorised.


Thank you very much!

To add to what @pikacuq wrote, here is a screenshot of how it looks like:

Terplas guide explains in more detail: Terpla adventures or blog-style guide for begginers

For anyone stumbling on this old thread, keep in mind a lot has changed in the meantime. The guides have evolved along with the frameworks for EVE Online.
Out of the new guides, here are the images most useful as a replacement of the older one above:

You find these and more in the guide at bots/ at main · Viir/bots · GitHub

Happy exploring!