diff --git a/src/DigitalData.Swagger.MockAPI/Data/ApiContext.cs b/src/DigitalData.Swagger.MockAPI/Data/ApiContext.cs
new file mode 100644
index 0000000..ecbe34b
--- /dev/null
+++ b/src/DigitalData.Swagger.MockAPI/Data/ApiContext.cs
@@ -0,0 +1,11 @@
+using DigitalData.Swagger.MockAPI.Dtos;
+using Microsoft.EntityFrameworkCore;
+
+namespace DigitalData.Swagger.MockAPI.Data;
+
+public class ApiContext(DbContextOptions<ApiContext> options) : DbContext(options)
+{
+    public DbSet<Company> Companies { get; set; }
+
+    public DbSet<Product> Products { get; set; }
+}
\ No newline at end of file
diff --git a/src/DigitalData.Swagger.MockAPI/Data/DBSeeder.cs b/src/DigitalData.Swagger.MockAPI/Data/DBSeeder.cs
new file mode 100644
index 0000000..b6612fe
--- /dev/null
+++ b/src/DigitalData.Swagger.MockAPI/Data/DBSeeder.cs
@@ -0,0 +1,75 @@
+using DigitalData.Swagger.MockAPI.Dtos;
+using System;
+
+namespace DigitalData.Swagger.MockAPI.Data
+{
+    public class DBSeeder
+    {
+        public static void AddCompaniesData(WebApplication app)
+        {
+            var scope = app.Services.CreateScope();
+            var db = scope.ServiceProvider.GetService<ApiContext>();
+
+            db.Companies.AddRange(new List<Company>()
+            {
+                new()
+                {
+                    ID = 1,
+                    Name = "TechCorp",
+                    Size = 500,
+                    Products = new List<Product>
+                    {
+                        new() { ID = 1, CompanyID = 1, Name = "Laptop X1", Price = 1200.99m },
+                        new() { ID = 2, CompanyID = 1, Name = "Smartphone S2", Price = 799.49m }
+                    }
+                },
+                new Company
+                {
+                    ID = 2,
+                    Name = "AutoWorks",
+                    Size = 300,
+                    Products = new List<Product>
+                    {
+                        new Product { ID = 3, CompanyID = 2, Name = "Electric Car E1", Price = 35000m },
+                        new() { ID = 4, CompanyID = 2, Name = "Hybrid SUV H2", Price = 42000m }
+                    }
+                },
+                new Company
+                {
+                    ID = 3,
+                    Name = "MediHealth",
+                    Size = 200,
+                    Products = new List<Product>
+                    {
+                        new() { ID = 5, CompanyID = 3, Name = "Vitamin Pack V10", Price = 19.99m },
+                        new() { ID = 6, CompanyID = 3, Name = "Protein Shake P5", Price = 25.49m }
+                    }
+                },
+                new Company
+                {
+                    ID = 4,
+                    Name = "HomeStyle",
+                    Size = 150,
+                    Products = new List<Product>
+                    {
+                        new() { ID = 7, CompanyID = 4, Name = "Smart Blender B3", Price = 89.99m },
+                        new() { ID = 8, CompanyID = 4, Name = "Air Purifier A1", Price = 149.99m }
+                    }
+                },
+                new Company
+                {
+                    ID = 5,
+                    Name = "GadgetZone",
+                    Size = 400,
+                    Products = new List<Product>
+                    {
+                        new() { ID = 9, CompanyID = 5, Name = "Wireless Earbuds W1", Price = 99.99m },
+                        new() { ID = 10, CompanyID = 5, Name = "Smart Watch G5", Price = 199.99m }
+                    }
+                }
+            });
+
+            db.SaveChanges();
+        }
+    }
+}
diff --git a/src/DigitalData.Swagger.MockAPI/DigitalData.Swagger.MockAPI.csproj b/src/DigitalData.Swagger.MockAPI/DigitalData.Swagger.MockAPI.csproj
index f271bc1..b21399f 100644
--- a/src/DigitalData.Swagger.MockAPI/DigitalData.Swagger.MockAPI.csproj
+++ b/src/DigitalData.Swagger.MockAPI/DigitalData.Swagger.MockAPI.csproj
@@ -8,6 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.OData" Version="9.1.3" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.1" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
   </ItemGroup>