I've written a plugin that gives a quick, searchable overview of Krita's Python API. The reference is built at run-time via Python's introspection abilities looking at the classes in the PyKrita.krita module, so it's always matching the installed Krita version. Since the API doesn't expose any doc strings or method signatures, all the plugin can do at the moment is print method names.

Screenshots and Code on Github

If you find any classes or methods the plugin is missing, let me know.

Cool! I wonder if there's a way to add docstrings, maybe to the sip files...

Having docstrings would be super neat. I only know the Python side of things, but the PyQt objects seem to expose at least the method signatures. Which naively I'd have thought shouldn't be too much work since that information must already be in the C++ code, as opposed to actual docstrings that need to be written by humans.