diff --git a/Interfaces/IXApplicationProvider.cs b/Interfaces/IXApplicationProvider.cs
new file mode 100644
index 0000000..dfc28c5
--- /dev/null
+++ b/Interfaces/IXApplicationProvider.cs
@@ -0,0 +1,471 @@
+using System;
+using System.Linq;
+using xModels.Dtos;
+using System.Threading;
+using xIdentityModels.Dtos;
+using System.Threading.Tasks;
+using xIdentityModels.Models;
+using System.Linq.Expressions;
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore.Query;
+
+namespace xIds.Interfaces
+{
+    /// <summary>
+    /// a Service For Manage Security Applications and also Api Key(s) ...
+    /// </summary>
+    public interface IXApplicationProvider
+    {
+        //
+        #region Application ...
+        /// <summary>
+        /// Add Specified Item ...
+        /// </summary>
+        /// <param name="item"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApplicationDto> AddApplicationAsync(
+            XApplicationDto item,
+            XUserClaimsInfoDto userInfo,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Update Specified Item ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="item"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApplicationDto> UpdateApplicationAsync(
+            int id,
+            XApplicationDto item,
+            XUserClaimsInfoDto userInfo = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Remove Specified Item ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="softDelete"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApplicationDto> RemoveApplicationAsync(
+            int id,
+            bool softDelete = true,
+            XUserClaimsInfoDto userInfo = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Retrieve an Item by Providing it's ID ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApplicationDto> GetApplicationAsync(
+            int id,
+            bool ignoreSoftDeleteds = true,
+            XUserClaimsInfoDto userInfo = null,
+            Func<IQueryable<XApplication>, IIncludableQueryable<XApplication, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Retrieve all Items ...
+        /// </summary>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="orderBuilder"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<IEnumerable<XApplicationDto>> GetAllApplicationAsync(
+            bool ignoreSoftDeleteds = true,
+            XUserClaimsInfoDto userInfo = null,
+            Func<IQueryable<XApplication>, IOrderedQueryable<XApplication>> orderBuilder = null,
+            Func<IQueryable<XApplication>, IIncludableQueryable<XApplication, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Retrieve all Items as Async Enumerable ...
+        /// </summary>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="orderBuilder"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        IAsyncEnumerable<XApplicationDto> GetAllApplicationAsAsyncEnumerable(
+            bool ignoreSoftDeleteds = true,
+            XUserClaimsInfoDto userInfo = null,
+            Func<IQueryable<XApplication>, IOrderedQueryable<XApplication>> orderBuilder = null,
+            Func<IQueryable<XApplication>, IIncludableQueryable<XApplication, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Find an Item By Providing a Conditional Expression ...
+        /// </summary>
+        /// <param name="predicate"></param>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApplicationDto> FindOneApplicationAsync(
+            Expression<Func<XApplication, bool>> predicate,
+            bool ignoreSoftDeleteds = true,
+            Func<IQueryable<XApplication>, IIncludableQueryable<XApplication, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Find a Collection of Items By Providing a Conditional Expression ...
+        /// </summary>
+        /// <param name="predicate"></param>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="orderBuilder"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<IEnumerable<XApplicationDto>> FindManyApplicationAsync(
+            Expression<Func<XApplication, bool>> predicate,
+            bool ignoreSoftDeleteds = true,
+            Func<IQueryable<XApplication>, IOrderedQueryable<XApplication>> orderBuilder = null,
+            Func<IQueryable<XApplication>, IIncludableQueryable<XApplication, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Retrieve Items based on XQuery Pagination Structure ...
+        /// </summary>
+        /// <param name="query"></param>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="predicate"></param>
+        /// <param name="orderBuilder"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XQueryResult<XApplicationDto>> QueryApplicationAsync(
+            XQuery query,
+            bool ignoreSoftDeleteds = true,
+            Expression<Func<XApplication, bool>> predicate = null,
+            Func<IQueryable<XApplication>, IOrderedQueryable<XApplication>> orderBuilder = null,
+            Func<IQueryable<XApplication>, IIncludableQueryable<XApplication, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+        #endregion
+
+        //
+        #region ApiKey ...
+        /// <summary>
+        /// Add Specified Item ...
+        /// </summary>
+        /// <param name="item"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApiKeyDto> AddApiKeyAsync(
+            XApiKey item,
+            XUserClaimsInfoDto userInfo,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Update Specified Item ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="item"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApiKeyDto> UpdateApiKeyAsync(
+            int id,
+            XApiKeyDto item,
+            XUserClaimsInfoDto userInfo = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Remove Specified Item ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="softDelete"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApiKeyDto> RemoveApiKeyAsync(
+            int id,
+            bool softDelete = true,
+            XUserClaimsInfoDto userInfo = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Retrieve an Item by Providing it's ID ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApiKeyDto> GetApiKeyAsync(
+            int id,
+            bool ignoreSoftDeleteds = true,
+            XUserClaimsInfoDto userInfo = null,
+            Func<IQueryable<XApiKey>, IIncludableQueryable<XApiKey, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Retrieve all Items ...
+        /// </summary>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="orderBuilder"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<IEnumerable<XApiKeyDto>> GetAllApiKeyAsync(
+            bool ignoreSoftDeleteds = true,
+            XUserClaimsInfoDto userInfo = null,
+            Func<IQueryable<XApiKey>, IOrderedQueryable<XApiKey>> orderBuilder = null,
+            Func<IQueryable<XApiKey>, IIncludableQueryable<XApiKey, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Retrieve all Items as Async Enumerable ...
+        /// </summary>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="orderBuilder"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        IAsyncEnumerable<XApiKeyDto> GetAllApiKeyAsAsyncEnumerable(
+            bool ignoreSoftDeleteds = true,
+            XUserClaimsInfoDto userInfo = null,
+            Func<IQueryable<XApiKey>, IOrderedQueryable<XApiKey>> orderBuilder = null,
+            Func<IQueryable<XApiKey>, IIncludableQueryable<XApiKey, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Find an Item By Providing a Conditional Expression ...
+        /// </summary>
+        /// <param name="predicate"></param>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApiKeyDto> FindOneApiKeyAsync(
+            Expression<Func<XApiKey, bool>> predicate,
+            bool ignoreSoftDeleteds = true,
+            Func<IQueryable<XApiKey>, IIncludableQueryable<XApiKey, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Find a Collection of Items By Providing a Conditional Expression ...
+        /// </summary>
+        /// <param name="predicate"></param>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="orderBuilder"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<IEnumerable<XApiKeyDto>> FindManyApiKeyAsync(
+            Expression<Func<XApiKey, bool>> predicate,
+            bool ignoreSoftDeleteds = true,
+            Func<IQueryable<XApiKey>, IOrderedQueryable<XApiKey>> orderBuilder = null,
+            Func<IQueryable<XApiKey>, IIncludableQueryable<XApiKey, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Retrieve Items based on XQuery Pagination Structure ...
+        /// </summary>
+        /// <param name="query"></param>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="predicate"></param>
+        /// <param name="orderBuilder"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XQueryResult<XApiKeyDto>> QueryApiKeyAsync(
+            XQuery query,
+            bool ignoreSoftDeleteds = true,
+            Expression<Func<XApiKey, bool>> predicate = null,
+            Func<IQueryable<XApiKey>, IOrderedQueryable<XApiKey>> orderBuilder = null,
+            Func<IQueryable<XApiKey>, IIncludableQueryable<XApiKey, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+        #endregion
+
+        //
+        #region ApiKeyUsage ...
+        /// <summary>
+        /// Add Specified Item ...
+        /// </summary>
+        /// <param name="item"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApiKeyUsageDto> AddApiKeyUsageAsync(
+            XApiKeyUsageDto item,
+            XUserClaimsInfoDto userInfo,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Update Specified Item ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="item"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApiKeyUsageDto> UpdateApiKeyUsageAsync(
+            int id,
+            XApiKeyUsageDto item,
+            XUserClaimsInfoDto userInfo = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Remove Specified Item ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="softDelete"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApiKeyUsageDto> RemoveApiKeyUsageAsync(
+            int id,
+            bool softDelete = true,
+            XUserClaimsInfoDto userInfo = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Retrieve an Item by Providing it's ID ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApiKeyUsageDto> GetApiKeyUsageAsync(
+            int id,
+            bool ignoreSoftDeleteds = true,
+            XUserClaimsInfoDto userInfo = null,
+            Func<IQueryable<XApiKeyUsage>, IIncludableQueryable<XApiKeyUsage, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Retrieve all Items ...
+        /// </summary>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="orderBuilder"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<IEnumerable<XApiKeyUsageDto>> GetAllApiKeyUsageAsync(
+            bool ignoreSoftDeleteds = true,
+            XUserClaimsInfoDto userInfo = null,
+            Func<IQueryable<XApiKeyUsage>, IOrderedQueryable<XApiKeyUsage>> orderBuilder = null,
+            Func<IQueryable<XApiKeyUsage>, IIncludableQueryable<XApiKeyUsage, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Retrieve all Items as Async Enumerable ...
+        /// </summary>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="userInfo"></param>
+        /// <param name="orderBuilder"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        IAsyncEnumerable<XApiKeyUsageDto> GetAllApiKeyUsageAsAsyncEnumerable(
+            bool ignoreSoftDeleteds = true,
+            XUserClaimsInfoDto userInfo = null,
+            Func<IQueryable<XApiKeyUsage>, IOrderedQueryable<XApiKeyUsage>> orderBuilder = null,
+            Func<IQueryable<XApiKeyUsage>, IIncludableQueryable<XApiKeyUsage, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Find an Item By Providing a Conditional Expression ...
+        /// </summary>
+        /// <param name="predicate"></param>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XApiKeyUsageDto> FindOneApiKeyUsageAsync(
+            Expression<Func<XApiKeyUsage, bool>> predicate,
+            bool ignoreSoftDeleteds = true,
+            Func<IQueryable<XApiKeyUsage>, IIncludableQueryable<XApiKeyUsage, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Find a Collection of Items By Providing a Conditional Expression ...
+        /// </summary>
+        /// <param name="predicate"></param>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="orderBuilder"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<IEnumerable<XApiKeyUsageDto>> FindManyApiKeyUsageAsync(
+            Expression<Func<XApiKeyUsage, bool>> predicate,
+            bool ignoreSoftDeleteds = true,
+            Func<IQueryable<XApiKeyUsage>, IOrderedQueryable<XApiKeyUsage>> orderBuilder = null,
+            Func<IQueryable<XApiKeyUsage>, IIncludableQueryable<XApiKeyUsage, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Retrieve Items based on XQuery Pagination Structure ...
+        /// </summary>
+        /// <param name="query"></param>
+        /// <param name="ignoreSoftDeleteds"></param>
+        /// <param name="predicate"></param>
+        /// <param name="orderBuilder"></param>
+        /// <param name="includeBuilder"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XQueryResult<XApiKeyUsageDto>> QueryApiKeyUsageAsync(
+            XQuery query,
+            bool ignoreSoftDeleteds = true,
+            Expression<Func<XApiKeyUsage, bool>> predicate = null,
+            Func<IQueryable<XApiKeyUsage>, IOrderedQueryable<XApiKeyUsage>> orderBuilder = null,
+            Func<IQueryable<XApiKeyUsage>, IIncludableQueryable<XApiKeyUsage, object>> includeBuilder = null,
+            CancellationToken cancellationToken = default
+        );
+        #endregion
+
+        //
+        #region Custom Actions ...
+        #endregion
+
+        //
+        #region Enrichers ...
+        #endregion
+    }
+}
\ No newline at end of file