ARK lets admins spawn items through the in-game console.
First, join your server, open the console, and enable admin commands:
enablecheats YOURADMINPASSWORD
Spawn an item by item ID:
admincheat GiveItemNum ITEMID QUANTITY QUALITY BLUEPRINT
ITEMID is the item number, QUANTITY is how many you want, QUALITY controls the quality, and BLUEPRINT is usually 0 for the item or 1 for a blueprint.
Spawn an item with a blueprint path:
admincheat GiveItem "Blueprint'/Game/PrimalEarth/CoreBlueprints/Weapons/PrimalItem_WeaponMetalPick.PrimalItem_WeaponMetalPick'" 1 0 0
Blueprint paths need to be exact. If the command does nothing, check the path, quotation marks, and whether the item belongs to a mod that is installed on the server.
Be careful spawning high-quality gear on live servers, as it can quickly affect progression.
