Short answer
The Zombie Supplier Station turns one zombie into a courier. Unlock it with Zombie Assistant (35 red, 5 green, after Tool Rack) and build it for 4 Wooden Plank and 4 Bronze Nails. Its zombie fetches materials from chests in the same area, feeds the benches that have a queue and stores the results. It needs no tool or mastery, so give it your weakest body.

The Town workshop
View full-size image ↗Official promotional screenshot · © Lazy Bear Games / tinyBuild · Official media kit · Material credits
Unlock: Zombie Assistant
The station comes from Zombie Assistant, a Building technology costing 35 red and 5 green tech points.
Its only prerequisite is Tool Rack (35 red). wikily.gg also lists Kitchen II as a second source of the station.
It is one of the cheapest automation techs in the game, so research it as soon as your first zombie can work a bench.
Build cost and where it goes
The station costs 4 Wooden Plank and 4 Bronze Nails. Our Bronze Nails guide covers a steady nail supply.
It can be built in six areas: the Yard, the Quarry, the Vineyard Basement, the Writing Basement, the Alchemy Lab and Home.
Each work area runs on its own. A courier only serves benches and chests inside its own area, so plan one station per production zone.

A build-mode view of a production yard from the official media kit. It illustrates station placement, not the Supplier Station itself.
View full-size image ↗Official promotional screenshot · © Lazy Bear Games / tinyBuild · Official media kit · Material credits
What the supplier zombie does
Exactly one zombie goes on the station, and it does not craft. It is the courier.
When a bench in its area has a queued recipe, the supplier pulls the inputs out of chests, carries them over, waits for the craft and returns the product to storage.
The station's panel shows what the courier is doing and a timer for the next delivery, which makes it the first thing to check when a line stalls.
Which zombie to put on it
Supplier work needs no tool and no mastery, so a zombie with one or two skulls does it as well as your best body.
Putting a high-skull zombie here wastes it. Save corrupted bodies for benches where mastery and perks pay off — our zombie mastery guide explains why.
Why the courier stands still
The materials are in the keeper's pockets. The courier only reads chests in its own area — put the inputs in a chest there.
The crafting zombie cannot start. A worker below the recipe's mastery, or with no tool, never asks for inputs. Hand it the right tool first.
The output chest is full or the route is blocked. Free up storage and clear the walking path between chest, bench and station.
Nothing is queued. The courier only delivers for recipes that are queued at a bench.
A two-zombie starter line
Build a Woodworking Workbench, a chest and the Supplier Station in the Yard.
Put the recipe's inputs in the chest, give one zombie an axe and assign it to the bench, and put a second, weaker zombie on the station.
Queue Wooden Planks and walk away. When it runs, copy the same pattern into the Quarry and Writing Basement.
Suppliers and the zombie limit
A courier is a full zombie, so it counts against your zombie limit like any worker.
If you go over the limit, the Excessive zombies debuff trims sermon income — our zombie limit guide shows how to raise the cap.
Sources
Related pages
Official screenshot · © Lazy Bear Games / tinyBuildProgressionGraveyard Keeper 2 Zombies
Official screenshot · © Lazy Bear Games / tinyBuildAutomationGraveyard Keeper 2 Zombie Mastery & Perks
Official screenshot · © Lazy Bear Games / tinyBuildAutomationGraveyard Keeper 2 Factory Layout & Setup
Official screenshot · © Lazy Bear Games / tinyBuildAutomationGraveyard Keeper 2 Zombie Limit & Excessive Zombies