diff --git a/src/ProfHeat.Core/Interfaces/ISourceDataManager.cs b/src/ProfHeat.Core/Interfaces/ISourceDataManager.cs
index abbb52c..f00e173 100644
--- a/src/ProfHeat.Core/Interfaces/ISourceDataManager.cs
+++ b/src/ProfHeat.Core/Interfaces/ISourceDataManager.cs
@@ -20,4 +20,5 @@ public interface ISourceDataManager
 {
     List<MarketCondition> LoadSourceData(string filePath);
     void SaveSourceData(List<MarketCondition> data, string filePath);
+    List<MarketCondition> FetchData(DateTime from, DateTime to);
 }
diff --git a/src/ProfHeat.Core/Repositories/ApiRepository.cs b/src/ProfHeat.Core/Repositories/ApiRepository.cs
new file mode 100644
index 0000000..908723d
--- /dev/null
+++ b/src/ProfHeat.Core/Repositories/ApiRepository.cs
@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using System.Threading.Tasks;
+using ProfHeat.Core.Interfaces;
+using ProfHeat.Core.Models;
+
+using ProfHeat.Core.Interfaces;
+using System.Text.Json;
+
+namespace ProfHeat.Core.Repositories;
+
+public class ApiRepository : IRepository
+{
+    private readonly HttpClient _httpClient = new();
+
+    public T Load<T>(string url)
+    {
+        var response = _httpClient.GetAsync(url).GetAwaiter().GetResult();
+        response.EnsureSuccessStatusCode();
+        var data = response.Content.ReadAsStringAsync().GetAwaiter().GetResult();
+        return JsonSerializer.Deserialize<T>(data)!;
+    }
+
+    public void Save<T>(T data, string filePath) => throw new NotImplementedException();
+}
diff --git a/src/ProfHeat.Core/Repositories/SourceDataManager.cs b/src/ProfHeat.Core/Repositories/SourceDataManager.cs
index 73c5898..6e9bd7b 100644
--- a/src/ProfHeat.Core/Repositories/SourceDataManager.cs
+++ b/src/ProfHeat.Core/Repositories/SourceDataManager.cs
@@ -19,9 +19,10 @@ namespace ProfHeat.Core.Repositories;
 
 public class SourceDataManager(IRepository repository) : ISourceDataManager
 {
-    public List<MarketCondition> LoadSourceData(string filePath) => repository.Load<List<MarketCondition>>(filePath);
+    public List<MarketCondition> LoadSourceData(string filePath) => repository.Load<List<MarketCondition>>(filePath).ToList();
 
     public void SaveSourceData(List<MarketCondition> data, string filePath) => repository.Save(data, filePath);
 
-    // Note Use API repository here
+    public List<MarketCondition> FetchData(DateTime from, DateTime to) =>
+    repository.Load<List<MarketCondition>>($"https://api.energidataservice.dk/dataset/Elspotprices?start={from:yyyy-MM-dd}&end={to:yyyy-MM-dd}");
 }