Is it possible to call API python for GRASS in a FME project?

Yes, but you need to change your python interpreter to the one where the grass library is installed.

Thank you for your answer but i try to use API python for GRASS and FME in the same project. I don't find a solution to call these together...

 

 

If you need both fmeObjects and grass together, then you need to install the grass module to the FME installation.

 

 

Since GRASS is available via PyPi you can use the instructions at https://knowledge.safe.com/articles/841/install-python-modules-into-fme.html