Factorio Forums

Where can I find the documentation for the public modding apis? I can't seem to find the official documentation.

Official documentation is in your Factorio folder in the doc-html subfolder.
Additional info can be found in the wiki, although it's sometimes a little bit outdated: https://forums.factorio.com/wiki/index.php?title=Modding

Official API documentation (the HTML documents you get with the game) is also uploaded here: http://lua-api.factorio.com/