diff --git a/src/modules/Elsa.Http/Options/HttpActivityOptions.cs b/src/modules/Elsa.Http/Options/HttpActivityOptions.cs
index b7b1b3ae1..2080c0068 100644
--- a/src/modules/Elsa.Http/Options/HttpActivityOptions.cs
+++ b/src/modules/Elsa.Http/Options/HttpActivityOptions.cs
@@ -20,7 +20,7 @@ public class HttpActivityOptions
     /// <summary>
     /// The prefix used for API routes.
     /// </summary>
-    [Obsolete("Use ElsaApiOptions from Elsa.Workflows.Api instead.")]
+    [Obsolete("Use ApiEndpointOptions from Elsa.Workflows.Api instead.")]
     public string ApiRoutePrefix { get; set; } = "elsa/api";
 
     /// <summary>
diff --git a/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowInstances/BulkDelete/Endpoint.cs b/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowInstances/BulkDelete/Endpoint.cs
index aadf329cd..b05f39821 100644
--- a/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowInstances/BulkDelete/Endpoint.cs
+++ b/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowInstances/BulkDelete/Endpoint.cs
@@ -10,15 +10,23 @@ internal class BulkDelete(IWorkflowInstanceManager store) : ElsaEndpoint<Request
 {
     public override void Configure()
     {
-        Post("/bulk-actions/delete/workflow-instances/by-id");
+        Post(
+            "/bulk-actions/delete/workflow-instances",
+            "/bulk-actions/delete/workflow-instances/by-id" // Deprecated route.
+        );
         ConfigurePermissions("delete:workflow-instances");
     }
 
     public override async Task<Response> ExecuteAsync(Request request, CancellationToken cancellationToken)
     {
-        var filter = new WorkflowInstanceFilter { Ids = request.Ids };
+        var filter = new WorkflowInstanceFilter
+        {
+            Ids = request.Ids,
+            DefinitionId = request.WorkflowDefinitionId,
+            DefinitionIds = request.WorkflowDefinitionIds,
+        };
         var count = await store.BulkDeleteAsync(filter, cancellationToken);
 
-        return new Response(count);   
+        return new(count);   
     }
 }
\ No newline at end of file
diff --git a/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowInstances/BulkDelete/Models.cs b/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowInstances/BulkDelete/Models.cs
index b58697cc1..0d2f37b2f 100644
--- a/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowInstances/BulkDelete/Models.cs
+++ b/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowInstances/BulkDelete/Models.cs
@@ -4,7 +4,9 @@ namespace Elsa.Workflows.Api.Endpoints.WorkflowInstances.BulkDelete;
 
 internal class Request
 {
-    public ICollection<string> Ids { get; set; } = default!;
+    public ICollection<string>? Ids { get; set; }
+    public string? WorkflowDefinitionId { get; set; }
+    public ICollection<string>? WorkflowDefinitionIds { get; set; }
 }
 
 internal class Response(long deletedCount)