CLI estimating working time form STP/STEP file

It is possible to calculate estimating working time from STP/STEP file using LinuxCNC CLI?
How could I do it?

Not sure what you mean. An st/step file contains a 3D model of an object. Linuxcnc works with gcode (ie toolpaths). If you have a toolpath file a rough estimate is possible but really nothing anywhere near precise.

Thanks Aciera,
I understand doing this:
1. convert STP file format to GCODE (how could i do this?)
2. use the GCODE file with LinuxCNC
My goal is: automatically estimate the production cost of an item starting from the stp file.
Do you know an easy solution? For example: API service online, python script, LinuxCNC configuration, etc.

In general, there is no easy solution. STP file can contain anything, even stuff that is not possible to manufacture. Also machining strategy hugely depends on material, machine, tools, work holding, tolerances, surface quality and so on.

3d model does not say anything about the time it will take because it depends on the machine you will use, cutter diameter, number of passes, etc... from the model the desired toolpath must be created in gcode with a cam program, then you will be able to have a time even if not very precise as Aciera and rmu  said.