diff --git a/Configurations/XApiKeyConfiguration.cs b/Configurations/XApiKeyConfiguration.cs
new file mode 100644
index 0000000..f7dae46
--- /dev/null
+++ b/Configurations/XApiKeyConfiguration.cs
@@ -0,0 +1,33 @@
+namespace xIds.Configurations
+{
+    /// <summary>
+    /// Configuration settings for API Key management, including expiration, rate limiting, and audit logging.
+    /// </summary>
+    public class XApiKeyConfiguration
+    {
+        /// <summary>
+        /// Default expiration in minutes (e.g., 43200 = 30 days)
+        /// </summary>
+        public int DefaultExpirationMinutes { get; set; } = 43200;
+
+        /// <summary>
+        /// Maximum allowed expiration in minutes (e.g., 525600 = 1 year)
+        /// </summary>
+        public int MaxExpirationMinutes { get; set; } = 525600;
+
+        /// <summary>
+        /// Maximum ApiKeys per Application
+        /// </summary>
+        public int MaxKeysPerApplication { get; set; } = 10;
+
+        /// <summary>
+        /// Enable audit logging
+        /// </summary>
+        public bool EnableAuditLog { get; set; } = true;
+
+        /// <summary>
+        /// Default rate limit (requests per minute)
+        /// </summary>
+        public int DefaultRateLimit { get; set; } = 60;
+    }
+}
\ No newline at end of file
diff --git a/DbContext/XIdentityDbContext.cs b/DbContext/XIdentityDbContext.cs
index 2b9628f..7d01345 100644
--- a/DbContext/XIdentityDbContext.cs
+++ b/DbContext/XIdentityDbContext.cs
@@ -1,9 +1,9 @@
-using Microsoft.AspNetCore.Identity;
-using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore;
 using xIdentityModels;
 using xIdentityModels.Models;
 using xIdentityModels.Navigations;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
 
 namespace xIds.DbContext
 {
@@ -13,7 +13,10 @@ namespace xIds.DbContext
         #region Props/DbSets ...
         public DbSet<XToken> Tokens { get; set; }
         public DbSet<XDevice> Devices { get; set; }
+        public DbSet<XApiKey> ApiKeys { get; set; }
         public DbSet<XProfileImage> Avatars { get; set; }
+        public DbSet<XApiKeyUsage> ApiKeyUsage { get; set; }
+        public DbSet<XApplication> Applications { get; set; }
         public DbSet<XBannedDevice> BannedDevices { get; set; }
         public DbSet<XFriendshipFollower> Followers { get; set; }
         public DbSet<XFriendshipFollowing> Followings { get; set; }
@@ -52,6 +55,24 @@ namespace xIds.DbContext
                     .HasForeignKey(ur => ur.UserId)
                     .IsRequired();
             });
+
+            //
+            // Configure XApplication ...
+            modelBuilder.Entity<XApplication>(e =>
+            {
+                e.HasIndex(a => a.Name).IsUnique();
+                e.HasMany(a => a.ApiKeys)
+                 .WithOne(k => k.Application)
+                 .HasForeignKey(k => k.ApplicationId);
+            });
+            
+            //
+            // Configure XApiKey ...
+            modelBuilder.Entity<XApiKey>(e =>
+            {
+                e.HasIndex(k => k.KeyHash).IsUnique();
+                e.HasIndex(k => k.ExpiresAt);
+            });
         }
     }
 }
\ No newline at end of file