Monster Spawner is a block that generates creatures in a fixed area. It appears as a cage-like structure containing a miniature, spinning model of the entity it spawns. These are typically found in dungeons, where they continuously produce hostile mobs, such as zombies, skeletons, or spiders, until destroyed or disabled by placing torches around them. Their rate of spawn is affected by the presence of players and light levels.
This item has no numerical item ID, therefore you must use the item ID to spawn the item. Numerical item IDs were removed in Minecraft version 1.13.
The item id for Monster Spawner is minecraft:spawner
The item ID for Monster Spawner is minecraft:spawner
This is the spawn command to give yourself Monster Spawner in Minecraft which includes the Minecraft /give command. If you are using the Essentials plugin you will need to use /minecraft:give instead of /give