The Odyssey Meta-Engine wiki page is currently down. The server is acting up, and I have no estimate how long it will be down.
You can reach the API documents here
I am currently starting to work on an Engine Crafting Manual which is intended to act as part tutorial and part usage manual for the Odyssey Meta-Engine. It will be a Word document and I'll probably have a PDF version available here. Hopefully I can get the wiki back up, which will have a version available there as well. Keep checking for updates to the API docs, the PDF manual, and possibly the server getting fixed.
Initial version of the Manual is now available! You can grab the Word version, or the PDF version.