JIPipe version 6.0.0 or higher can run Labkit models without the need for an ImageJ macro.
Just import your existing Labkit classifier using the Import JSON node and provide the image(s) and the model(s).

The node should behave exactly as the existing ImageJ macro functions and combines both the generation of labels and probability maps.
To use the example, use JIPipe's Import RO-Crate function or extract the ZIP file and open the included project file.
JIPipe 5.3.0 or older
Older JIPipe versions do not directly integrate Labkit through a node, but support the tool through the ImageJ Macro node. Within the provided example file, you will need to adapt the classifier file path to where you extracted the ZIP directory.