It is described as the creator in the testament of marco singe the so called pain prophet of new delhi although whether it is actually the creator or not is impossible to prove.
Gutter magic chronicles of the god machine.
The god machine is a sentient supernatural extremely powerful and alien entity similar to an occult supercomputer with an interest in earth.
The chronicles of darkness book has rules for making standard antagonists ephemerals and horrors like spider man would be in the chronicles of darkness if designed as an antagonist.
Otherwise if you do have access to a wide variety of books a number have been mentioned above you can source for powers abilities and oddities.
Whereas the god machine chronicle is designed to be open not to tie the gm in to any one hard truth it does feel that escalation is inevitable.
Even if you re playing a local game with low power levels and equipment then characters are surely going to dig up whispers of evidence or theories.
Symbol of the god machine as depicted in the god machine chronicles.