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About

Traders are NPCs that can be called via a Computer with a Motherboard (Communication) installed.

They will buy and sell any kind of object with the player:

After the player interacts with a Trader, the game will open a GUI where the player will select the item to buy or to sell.
The same interface is used to tell to the Trader to depart.

Update

Since trading update 5, Landing Pads in Stationeers have changed to give you more choices. Now you can place them on different tiles with different options. The smallest Landing Pad that works is a 3x3 square, and it needs a centerpiece in the middle. When a Trader shuttle arrives, it lands right in the middle of the centerpiece. The Landingpad center has an arrow showing which way the shuttles come and go. It's really important to make sure nothing blocks the arrow's path. That way, the shuttles can move smoothly without any problems. The shuttles usually land and take off at an angle of about 50 to 60 degrees.

Once your Landing Pad is ready, you can check the computer terminal to see what size landing pad each available shuttle needs.

There are six types of shuttles, including small, medium, and large ones, with normal and gas options. Shuttles can either use a runway or make a vertical descent to land. Small shuttles need a 3x3 pad, medium shuttles need a 5x5 pad, and large shuttles need a 6x6 pad. Having different pad sizes lets you trade with more Traders who visit your station. In order to find them you will need larger satellite dishes to send power to the shuttles and planes landing.

If you want to trade with human Traders, you'll need to create a hangar with air they can breathe. Large shuttles and planes sometimes have human Traders inside. These Traders won't come out and trade unless there's air in the hangar. So, make sure you build a pressurized hangar to accommodate them.

Contact Type IDs (Size, runway, hangar requirements non applicable):

Contact Name	Type ID
All Alloys	54412100
Build Inc	175935584
Gas For Less	-470575659
Green Futures	-1077922067
Green Futures Deluxe	-1311144036
More Ore Less	-1374574351

All Alloys (7x7 - 15)

Player can buy: Steel Ingot, Solder Ingot, Constantan Ingot, Electrum Ingot, Invar Ingot, Astroloy Ingot, Waspaloy Ingot, Hastelloy Ingot, Inconel Ingot, Stellite Ingot.

Player can sell: Iron Ore, Copper Ore, Silicon Ore, Gold Ore, Coal, Lead Ore, Nickel Ore, Silver Ore, Cobalt Ore, 100 Moles Fuel.

Build Inc (3x3)

Player can buy: Pipe Kit, Cable Coil, Glass Sheet, Plastic Sheet, Steel Sheet, Wall Kit, Steel Frame.

Player can sell: Steel Ingot, Solder Ingot, Constantan Ingot, Electrum Ingot, Invar Ingot, Astroloy Ingot

Build Inc (7x7 - 15)

Player can buy: Pipe Kit, Cable Coil, Heavy Cable, Glass Sheet, Plastic Sheet, Steel Sheet, Wall Kit, Steel Frame.

Player can sell: Steel Ingot, Solder Ingot, Constantan Ingot, Electrum Ingot, Invar Ingot, Astroloy Ingot, Waspaloy Ingot, Hastelloy Ingot, Inconel Ingot, Stellite Ingot.

Gas For Less (3x3)

Player can buy: 100 Moles O2, 100 Moles N2, 100 Moles CO2, 100 Moles H2, 100 Moles X (-$), 100 Moles H2O, 100 Moles N2O, 100 Moles Dirty H2, 100 Moles Steam, Oxygen Canister, Fuel Canister, Water Canister, Nitrogen Canister, Emergency Water

Player can sell: Oxite Ice, Nitrice Ice, Water Ice, Volatile Ice, 100 Moles Volatiles, 100 Moles Oxygen, 100 Moles CO2, Pumpkin Pie.

Gas For Less (7x7)

Player can buy: 100 Moles O2, 100 Moles N2, 100 Moles CO2, 100 Moles H2, 100 Moles X (-$), 100 Moles H2O, 100 Moles N2O, 100 Moles Dirty H2, 100 Moles Steam, Oxygen Canister, Fuel Canister, Water Canister, Nitrogen Canister, Emergency Water

Player can sell: Oxite Ice, Nitrice Ice, Water Ice, Volatile Ice, 100 Moles Volatiles, 100 Moles Oxygen, 100 Moles CO2, Heavy Filter (Pollutants).

Gas For Less (7x7 - 15)

Player can buy: 100 Moles O2, 100 Moles N2, 100 Moles CO2, 100 Moles H2, 100 Moles X (-$), 100 Moles H2O, 100 Moles N2O, 100 Moles Dirty H2, 100 Moles Steam, Oxygen Canister, Fuel Canister, Water Canister, Nitrogen Canister, Emergency Water

Player can sell: Oxite Ice, Nitrice Ice, Water Ice, Volatile Ice, 100 Moles Volatiles, 100 Moles Oxygen, 100 Moles CO2, Heavy Filter (N2O).

Green Futures (3x3)

Player can buy: Fern Seeds, Mushroom Seeds, Corn Seeds, Potato Seeds, Pumpkin Seeds, Rice Seeds, Soybean Seeds, Switchgrass Seeds, Tomato Seeds, Wheat Seeds.

Player can sell: 100 Moles CO2, 100 Moles H2O, Potatoes, Wheat, Rice, Corn, Soybeans, Mushrooms, Tomatoes, Pumpkin, Plant Genetic Analyzer.

Green Futures (5x5)

Player can buy: Fern Seeds, Mushroom Seeds, Corn Seeds, Potato Seeds, Pumpkin Seeds, Rice Seeds, Soybean Seeds, Switchgrass Seeds, Tomato Seeds, Wheat Seeds, Darga Fern, Tropical lily.

Player can sell: 100 Moles CO2, 100 Moles H2O, Potatoes, Wheat, Rice, Corn, Soybeans, Mushrooms, Tomatoes, Pumpkin, 100 Moles H2O, 100 Moles Fuel.

Green Futures Deluxe (3x3)

This trader is from a mod https://steamcommunity.com/sharedfiles/filedetails/?id=2972295550

Player can buy: Fern Seeds, Mushroom Seeds, Corn Seeds, Potato Seeds, Pumpkin Seeds, Rice Seeds, Soybean Seeds, Switchgrass Seeds, Tomato Seeds, Wheat Seeds, Winterspawn (Alpha Variant), Hades Flower (Alpha Strain), Darga Fern, Tropical Lily.

Player can sell: 100 Moles CO2, 100 Moles H2O, Potatoes, Wheat, Rice, Corn, Soybeans, Mushrooms, Tomatoes, Pumpkin, 100 Moles Fuel.

Green Futures Deluxe (7x7 - 15)

This trader is from a mod https://steamcommunity.com/sharedfiles/filedetails/?id=2972295550

Player can buy: Fern Seeds, Mushroom Seeds, Corn Seeds, Potato Seeds, Pumpkin Seeds, Rice Seeds, Soybean Seeds, Switchgrass Seeds, Tomato Seeds, Wheat Seeds, Winterspawn (Alpha Variant), Winterspawn (Beta Variant), Alien Mushroom, Tropical Lily.

Player can sell: 100 Moles CO2, 100 Moles H2O, Potatoes, Wheat, Rice, Corn, Soybeans, Mushrooms, Tomatoes, Pumpkin, Plant Genetic Analyzer.

More Ore Less (3x3)

Player can buy: Iron Ore, Copper Ore, Silicon Ore, Gold Ore, Coal, Lead Ore, Nickel Ore, Silver Ore, Oxite Ice, Volatile Ice, Unprocessed Ore.

Player can sell: Canned Edamame, Canned Rice Pudding, Tomato Soup, Pumpkin Soup, Corn Soup, 100 Moles Fuel, Hard Mining Backpack.

More Ore Less (7x7 - 15)

Player can buy: Iron Ore, Copper Ore, Silicon Ore, Gold Ore, Coal, Lead Ore, Nickel Ore, Silver ore, Oxite, Volatiles, Unprocessed Ore.

Player can sell: Canned Edamame, Canned Rice Pudding, Tomato Soup, Pumpkin Soup, Corn Soup, Fitted-Out HardSuit (Additional Conditions), Hard Mining Backpack.

There are additional 9x9 traders as well in the latest update. The above traders are accurate to the trade update V version. (except for the modded Deluxe versions.)

Requirements

To call a Trader the following things are necessary:

• A Landing Pad area at least of size 3x3. Bigger landing pad = bigger suttles up to 6x6.
• With a Landingpad center. Mind the arrow for the shuttle approach/departure direction. They tend to approach at a 50 to 60 degree angle towards the pad.

Directly in touch with a:

• A landingpad Data and Power

Which has a data- and power port. This must be connected with cables to a cable network with the following attached.

• A Computer with a Motherboard (Communication) installed (to call the Trader).
• A Satellite Dish (for tracking the Trader)
• A Vending Machine or Vending Machine Refrigerated.

Then do the following:

• Power everything up, and connect on the same network. When using the Computer, you can select which pad and Satellite Dish you want to utilize. If there is one of each, there is not much to choose from :).
• Track a Trader signal with the Satellite Dish. There are buttons on the Satellite Dish. If you want to go pro, you can automate it using another computer, but all you need to do simple automation is 2 logic readers, 2 logic writers and two dials. Set one logic reader and writer pair to read one dial, and the other to read the other dial, set one of the logic writers to output the value of the dial to the horizonal (max dial setting 360) and the other logic writer to the vertical setting on the satellite dish (max setting 90).
• Be sure you turn the power dial up on your satellite to send the signal to the trader ship. This sends the signal faster when negotiating with the trader. This cannot be automated on the smaller satellite dishes as there is no write setting on smaller satellite dishes. (The larger ones may be able to do this, update this if so).
• You do not have to be perfectly at 0 degrees from the traders when you have their signal as long as you meet the minimum power requirements. (upgrade your satellite dish for more power and smaller ships like the 3x3 can be negotiated from the opposite direction 100+ degrees off) but keep in mind the medium satellite dish can exceed the power rating of low voltage cables and will burn them out if you try to negotiate with more power than the line can hold. You should also consider the other devices on the network as well.
• Once you have locked a target, negotiate the trader. This will take time depending on your max power output and their ship's requirements.
• Once you have negotiated then the landing request option will be available.
• A trader will NEVER leave your pad until you depart them from the trade window. You can basically hold one hostage if you want but you cannot land anyone else without additional landing pads.
• Trade with the trader and once you're done with them, click depart. (No you can't stow away in their ships, you will just fall out when they warp away.)

Gas and liquid

If you want to trade gas or liquid, you can use:

• landingpad gas storage

With an appropriate:

• landingpad gas input
• landingpad gas output
• landingpad liquid input
• landingpad liquid output

Input and output modules have pipe connections with their own volume pump (button) to pump in and out gases. Buying and selling is done per 100 moles.

Both gas and liquid will store in your landingpad gas storage tank but must be removed and added by use of the appropriate landing pad atmospherics kits: landingpad liquid output, landingpad liquid input for liquids and landingpad gas output, landingpad gas output for gasses. Both will be stored inside landingpad gas storage. Multiple storage tanks will increase the maximum moles you can store on the pad. These tanks are not insulated so you will need to build a room around the tanks and either vent the world air around it to maintain a vacuum or pressurize it to the holding temperatures you want to keep. At this time there is no way to insulate the pad other than this method. (Update this if you have any additional information or ideas)

Do not forget to flush your landingpad gas storage using landingpad gas output or landingpad liquid output if you want to export a different kind of gas or they will mix in your output line. You can setup a gas capturing system to capture gasses and filter out the various gasses after pumping it off your pad.

In order to sell gasses and liquids to traders, you will need to make sure the gas temperature in the landingpad gas storage has a comfy temperature prior to pumping it to your pad to trade. The gasses must be pumped in the appropriate temperature before the trader will accept the gas or liquid. Hover over the icon in the sell window to find out what the trader wants the temperature range to be. These vary between gasses.

Notes

• For trade a player should have Credit Card in any slot of his character inventory (isn't necessary that is placed in the Credit Card slot of his suit), otherwise any attempt to trade will return an error message with "You do not have enough money to complete this transaction!".
• If a character has more than one Credit Card, the trade will use the last in the inventory order.
• You can connect more than one Vending Machine or Vending Machine Refrigerated connected to the same Landing Pad.
• Traders will refuse to land (you won't be able to click the landing button) if there isn't any Vending Machine or Vending Machine Refrigerated connected to the Landing Pad, or if no one is powered.
• Sell prices are always less than the buy value.
• Prices of any item depend on the kind of trader.
• Selling a Credit Card to a Trader will ignore the balance within the card. This means that selling a Credit Card with a balance greater than 0 will cause the player to lose money.
• During a storm, Traders can't land but they can depart. You will receive a prompt if you try to land one during a storm who cannot. Some plane traders can land in storms. The prompt will let you know if they can or cannot, but keep in mind they can crash into your base if they don't have enough landing space. A runway should be at least 15 - 20 blocks long according to the dev blogs.

This is an example of tracking setup with a Integrated Circuit (IC10) code for automate the process.
Alternatively on this Youtube Video there is a good explanation by Saddamo De Beers. (outdated)

Bugs

• The trader will lock and go into a bugged state if you add things to the vending machine after a trader is requested to land. The bug can be seen by the trading GUI not opening (throws a NullReferenceException), save and reload or dismount the Landing Pad (that will make the trader depart) will fix the bug.

• NEW with trade update: You can move with the trade window open if you hit your mouse interaction button. Just hold Left ALT to get your mouse back and close the window.