You can find developer documentation as part of artifacts from each build.These artifacts are reachable from theH2O download page. A shortcut to the latest stable docs release can be found at theH2O docs page.

Additionally, there is some more low-level developer documentation in github:

• The top-level GithubREADME.md for developers getting started
• Some starterAPI examples (Needs work!)
• Additionaldeveloper documentation