diff --git a/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Contracts/IWorkflowDefinitionsApi.cs b/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Contracts/IWorkflowDefinitionsApi.cs
index 23fed1f70..468d8b614 100644
--- a/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Contracts/IWorkflowDefinitionsApi.cs
+++ b/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Contracts/IWorkflowDefinitionsApi.cs
@@ -17,7 +17,6 @@ public interface IWorkflowDefinitionsApi
     /// <param name="request">The request containing options for listing workflow definitions.</param>
     /// <param name="versionOptions">The version options.</param>
     /// <param name="cancellationToken">The cancellation token.</param>
-    /// <returns>The response containing the workflow definitions.</returns>
     [Get("/workflow-definitions?versionOptions={versionOptions}")]
     Task<ListWorkflowDefinitionsResponse> ListAsync([Query]ListWorkflowDefinitionsRequest request, [Query]VersionOptions? versionOptions = default, CancellationToken cancellationToken = default);
 
@@ -28,7 +27,6 @@ public interface IWorkflowDefinitionsApi
     /// <param name="versionOptions">The version options.</param>
     /// <param name="includeCompositeRoot">Whether to include the root activity of composite activities.</param>
     /// <param name="cancellationToken">The cancellation token.</param>
-    /// <returns>The workflow definition.</returns>
     [Get("/workflow-definitions/{definitionId}?versionOptions={versionOptions}&includeCompositeRoot={includeCompositeRoot}")]
     Task<WorkflowDefinition?> GetAsync(string definitionId, VersionOptions? versionOptions = default, bool includeCompositeRoot = false, CancellationToken cancellationToken = default);
     
@@ -44,7 +42,6 @@ public interface IWorkflowDefinitionsApi
     /// </summary>
     /// <param name="name">The name to check.</param>
     /// <param name="cancellationToken">The cancellation token.</param>
-    /// <returns>A response containing a value indicating whether the name is unique.</returns>
     [Get("/workflow-definitions/validation/is-name-unique?name={name}")]
     Task<GetIsNameUniqueResponse> GetIsNameUniqueAsync(string name, CancellationToken cancellationToken = default);
 
@@ -53,7 +50,6 @@ public interface IWorkflowDefinitionsApi
     /// </summary>
     /// <param name="request">The request containing the workflow definition to save.</param>
     /// <param name="cancellationToken">The cancellation token.</param>
-    /// <returns>The workflow definition.</returns>
     [Post("/workflow-definitions")]
     Task<WorkflowDefinition> SaveAsync(SaveWorkflowDefinitionRequest request, CancellationToken cancellationToken = default);
     
@@ -62,7 +58,14 @@ public interface IWorkflowDefinitionsApi
     /// </summary>
     /// <param name="definitionId">The ID of the workflow definition to delete.</param>
     /// <param name="cancellationToken">The cancellation token.</param>
-    /// <returns>The response.</returns>
     [Delete("/workflow-definitions/{definitionId}")]
     Task<DeleteWorkflowDefinitionResponse> DeleteAsync(string definitionId, CancellationToken cancellationToken = default);
+    
+    /// <summary>
+    /// Deletes many workflow definitions.
+    /// </summary>
+    /// <param name="request">The request containing the IDs of the workflow definitions to delete.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    [Post("/bulk-actions/delete/workflow-definitions/by-definition-id")]
+    Task<DeleteManyWorkflowDefinitionsResponse> DeleteManyAsync(DeleteManyWorkflowDefinitionsRequest request, CancellationToken cancellationToken = default);
 }
\ No newline at end of file
diff --git a/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Models/DeleteManyWorkflowDefinitionsRequest.cs b/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Models/DeleteManyWorkflowDefinitionsRequest.cs
new file mode 100644
index 000000000..78de30900
--- /dev/null
+++ b/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Models/DeleteManyWorkflowDefinitionsRequest.cs
@@ -0,0 +1,21 @@
+namespace Elsa.Api.Client.Resources.WorkflowDefinitions.Models;
+
+/// <summary>
+/// A request to delete many workflow definitions.
+/// </summary>
+public class DeleteManyWorkflowDefinitionsRequest
+{
+    /// <summary>
+    /// Initializes a new instance of the <see cref="DeleteManyWorkflowDefinitionsRequest"/> class.
+    /// </summary>
+    /// <param name="definitionIds">The IDs of the workflow definitions to delete.</param>
+    public DeleteManyWorkflowDefinitionsRequest(IEnumerable<string> definitionIds)
+    {
+        DefinitionIds = definitionIds.ToArray();
+    }
+    
+    /// <summary>
+    /// Gets or sets the IDs of the workflow definitions to delete.
+    /// </summary>
+    public string[] DefinitionIds { get; set; }
+}
\ No newline at end of file
diff --git a/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Models/DeleteManyWorkflowDefinitionsResponse.cs b/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Models/DeleteManyWorkflowDefinitionsResponse.cs
new file mode 100644
index 000000000..64dced1d4
--- /dev/null
+++ b/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Models/DeleteManyWorkflowDefinitionsResponse.cs
@@ -0,0 +1,7 @@
+namespace Elsa.Api.Client.Resources.WorkflowDefinitions.Models;
+
+/// <summary>
+/// The response from a request to delete workflow definitions.
+/// </summary>
+/// <param name="Deleted">The number of workflow definitions deleted.</param>
+public record DeleteManyWorkflowDefinitionsResponse(long Deleted);
\ No newline at end of file