Translations:NPC Placement and Alignment/89/en
From DragonMineZ Wiki
To get the coordinates, stand where the NPC should be and run /dmzstructure here: it prints the structure, its template and your position and yaw relative to the template, with a Copy NPC JSON button that copies a ready-made entry. /dmzstructure npcs lists the NPCs of the structure you are in and whether each one has spawned yet. Both commands need the dragonminez.dmzstructure permission (see Permissions).