diff --git a/Frontend/Marketplaces/Interfaces/IPotatoMarketplace.cs b/Frontend/Marketplaces/Interfaces/IPotatoMarketplace.cs
new file mode 100644
index 0000000000000000000000000000000000000000..757223d802fe535e5395f22715d2f3830b54dbb3
--- /dev/null
+++ b/Frontend/Marketplaces/Interfaces/IPotatoMarketplace.cs
@@ -0,0 +1,13 @@
+using Frontend.Assets;
+
+namespace Frontend.Marketplaces.Interfaces
+{
+    public interface IPotatoMarketPlace
+    {
+        public double PotatoPrice { get; }
+        public double PotatoKgToChf(double kg);
+        public double ChfToPotatoKg(double chf);
+        public PotatoTransaction Buy(double amountInChf);
+        public double Sell(PotatoTransaction transaction);
+    }
+}
diff --git a/Frontend/Marketplaces/PotatoMarketplaceMock.cs b/Frontend/Marketplaces/PotatoMarketplaceMock.cs
new file mode 100644
index 0000000000000000000000000000000000000000..fb3accf14f4242772fef27eeaf06fc3da2bab29e
--- /dev/null
+++ b/Frontend/Marketplaces/PotatoMarketplaceMock.cs
@@ -0,0 +1,32 @@
+using Frontend.Assets;
+using Frontend.Marketplaces.Interfaces;
+
+namespace Frontend.Marketplaces;
+
+public class PotatoMarketplaceMock() : IPotatoMarketPlace
+{
+    private const double potatoKgPrice = 2.02; // source: https://www.blw.admin.ch/blw/de/home/markt/marktbeobachtung/kartoffeln.html
+
+    public double PotatoPrice => potatoKgPrice;
+
+    public double ChfToPotatoKg(double chf)
+    {
+        return chf / potatoKgPrice;
+    }
+
+    public double PotatoKgToChf(double kg)
+    {
+        return kg * potatoKgPrice;
+    }
+
+    public PotatoTransaction Buy(double amountInChf)
+    {
+        var amountInKg = ChfToPotatoKg(amountInChf);
+        return new() { Weight = amountInKg };
+    }
+
+    public double Sell(PotatoTransaction transaction)
+    {
+        return PotatoKgToChf(transaction.Weight);
+    }
+}
diff --git a/Frontend/Program.cs b/Frontend/Program.cs
index 4e9f8a5981638c79fcff8ae7c56198438e7cbbbe..2bf5552c8fe819b89ce90d843f64cc40c875e541 100644
--- a/Frontend/Program.cs
+++ b/Frontend/Program.cs
@@ -1,6 +1,8 @@
 using Frontend;
 using Frontend.AssetStores;
 using Frontend.BackgroundServices;
+using Frontend.Marketplaces;
+using Frontend.Marketplaces.Interfaces;
 using Frontend.Metrics;
 using Microsoft.EntityFrameworkCore;
 using OpenTelemetry.Metrics;
@@ -28,6 +30,7 @@ builder.Services.AddHostedService<PrometheusService>();
 builder.Services.AddSingleton<Erc20TokenMetrics>();
 builder.Services.AddSingleton<EthMetrics>();
 builder.Services.AddSingleton<PotatoStorageMetrics>();
+builder.Services.AddSingleton<IPotatoMarketPlace>(sp => new PotatoMarketplaceMock());
 
 builder.Services.AddSingleton(provider => new TokenClient(
     chainApiUrl,