diff --git a/Interfaces/IXBaseReferenced.cs b/Interfaces/IXBaseReferenced.cs
index 0129904..0888c78 100644
--- a/Interfaces/IXBaseReferenced.cs
+++ b/Interfaces/IXBaseReferenced.cs
@@ -1,6 +1,8 @@
 using System;
+using System.Collections;
 using System.Threading;
 using System.Threading.Tasks;
+using xDataService.Models;
 using xIdentityModels.Models;
 
 namespace xIdentityService.Interfaces
@@ -76,6 +78,11 @@ namespace xIdentityService.Interfaces
             XUserClaimsInfoDto userInfo = null,
             string connectionId = null,
             CancellationToken cancellationToken = default
-        );                
+        );
+
+        Task<IEnumerable<XReference<string>>> GetReferences(
+            Guid id,
+
+        );
     }
 }
\ No newline at end of file
diff --git a/Interfaces/IXBaseReferencedController.cs b/Interfaces/IXBaseReferencedController.cs
new file mode 100644
index 0000000..f607a55
--- /dev/null
+++ b/Interfaces/IXBaseReferencedController.cs
@@ -0,0 +1,63 @@
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using xModels.Base;
+
+namespace xIdentityService.Interfaces
+{
+    public interface IXBaseReferencedController<TEntity, TKey>
+    where TEntity : XBaseEntity<TKey>
+    {
+        /// <summary>
+        /// Check an Item Has Reference to Specified ProvideFor and Specified forProvidedId ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="providedFor"></param>
+        /// <param name="forProvidedId"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        [HttpGet("{id}/Reference/IsProvidedFor")]
+        Task<ActionResult<bool>> IsProvidedFor(
+            [FromRoute] TKey id,
+            [FromQuery] string providedFor,
+            [FromQuery] object forProvidedId,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Add a Reference to Item for Specified ProvideFor and Specified forProvidedId ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="providedFor"></param>
+        /// <param name="forProvidedId"></param>
+        /// <param name="forIndex"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        [HttpPost("{id}/Reference")]
+        Task<ActionResult> AddReference(
+            [FromRoute] TKey id,
+            [FromQuery] string providedFor,
+            [FromQuery] object forProvidedId,
+            [FromQuery] int forIndex = 0,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Remove a Reference from Item for Specified ProvideFor and Specified forProvidedId ...
+        /// </summary>
+        /// <param name="id"></param>
+        /// <param name="providedFor"></param>
+        /// <param name="forProvidedId"></param>
+        /// <param name="forIndex"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        [HttpDelete("{id}/Reference")]
+        Task<ActionResult> RemoveReference(
+            [FromRoute] TKey id,
+            [FromQuery] string providedFor,
+            [FromQuery] object forProvidedId,
+            [FromQuery] int forIndex = 0,
+            CancellationToken cancellationToken = default
+        );        
+    }
+}
\ No newline at end of file