Apidocs.co is an ambitious online project by Gui Talarico, the author of the Revit API website called RevitAPIdocs. Instead of focusing on one particular application, apidocs combines several applications' APIs into one online library with more than 120K unique documents:
Apidocs has a clean and user-friendly interface, which is easy to use and navigate. Just select the desired application, then either search or dive into its API:
This project is a huge timesaver and a one-stop shop for several design applications' APIs. Moreover, it is open and free for everyone.
And if you are interested in supporting the project, head over to support page: apidocs.co/support