Might be easier to stitch the changes together in a video editor.

This is something I can't and rather not do via video editing. I've made a custom file format with an exporter for an external program, that contains mesh, material & image data inside it. I've made a c4d plugin that reads the file ...

Again, there's not any special command or functioning for node editor. Node editor will display what you do with material editor.
What are you trying to obtain?

I have 4 textures (Diffuse, Normal & Metallic & Roughness) and a material name. I wanna create a material with PBR setup through node ...

There's not any different way as using nodes in node editor. They will be shown when you create any nodes by default ways. There's some scripts in this topic for creating the octane nodes. Ids is visible by dropping any parameters or nodes to python editor.
https://render.otoy.com/forum/viewtopic ...

Hello,

I noticed there's no official Python SDK for Octane so I'm having a little trouble accessing some things. Basically, I've managed to create a diffuse material and add some image inputs, but now I need to actually use the node editor and create some nodes to adjust the images a little before ...