diff --git a/src/lib/api/slot-definitions.ts b/src/lib/api/slot-definitions.ts
index ffe8138..2c6494c 100644
--- a/src/lib/api/slot-definitions.ts
+++ b/src/lib/api/slot-definitions.ts
@@ -2,6 +2,10 @@ import type {
   SlotDefinition,
   SlotDefinitionRequest,
   SlotDefinitionError,
+  GenerateSlotDefinitionsRequest,
+  GenerateSlotDefinitionsResponse,
+  CloneSlotDefinitionRequest,
+  CloneSlotDefinitionResponse,
 } from '@/src/types/slot-definitions';
 
 const API_BASE_URL = process.env.NEXT_PUBLIC_PYTHON_API_URL;
@@ -166,6 +170,82 @@ export async function deleteSlotDefinition(
   }
 }
 
+// POST /admin/clubs/{club_id}/slot-definitions/generate
+export async function generateSlotDefinitions(
+  clubId: number,
+  request: GenerateSlotDefinitionsRequest
+): Promise<ApiResult<GenerateSlotDefinitionsResponse>> {
+  try {
+    const response = await fetch(`${API_BASE_URL}/admin/clubs/${clubId}/slot-definitions/generate`, {
+      method: 'POST',
+      credentials: 'include',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify(request),
+    });
+
+    if (!response.ok) {
+      const error: SlotDefinitionError = await response.json();
+      return { success: false, error };
+    }
+
+    const data: GenerateSlotDefinitionsResponse = await response.json();
+    return { success: true, data };
+  } catch (error) {
+    return {
+      success: false,
+      error: {
+        type: 'about:blank',
+        title: 'Network Error',
+        status: 0,
+        detail: 'Failed to generate slot definitions. Please check your connection.',
+        code: 'network_error',
+      },
+    };
+  }
+}
+
+// POST /admin/clubs/{club_id}/slot-definitions/{slot_definition_id}/clone
+export async function cloneSlotDefinition(
+  clubId: number,
+  slotDefinitionId: number,
+  request: CloneSlotDefinitionRequest
+): Promise<ApiResult<CloneSlotDefinitionResponse>> {
+  try {
+    const response = await fetch(
+      `${API_BASE_URL}/admin/clubs/${clubId}/slot-definitions/${slotDefinitionId}/clone`,
+      {
+        method: 'POST',
+        credentials: 'include',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify(request),
+      }
+    );
+
+    if (!response.ok) {
+      const error: SlotDefinitionError = await response.json();
+      return { success: false, error };
+    }
+
+    const data: CloneSlotDefinitionResponse = await response.json();
+    return { success: true, data };
+  } catch (error) {
+    return {
+      success: false,
+      error: {
+        type: 'about:blank',
+        title: 'Network Error',
+        status: 0,
+        detail: 'Failed to clone slot definition. Please check your connection.',
+        code: 'network_error',
+      },
+    };
+  }
+}
+
 // Mock data for local development
 export function getMockSlotDefinitions(): SlotDefinition[] {
   return [
diff --git a/src/types/slot-definitions.ts b/src/types/slot-definitions.ts
index 5c8b771..7e73938 100644
--- a/src/types/slot-definitions.ts
+++ b/src/types/slot-definitions.ts
@@ -84,3 +84,132 @@ export function calculateEndTime(startTime: string, durationMinutes: number): st
   const endMinutes = totalMinutes % 60;
   return `${String(endHours).padStart(2, '0')}:${String(endMinutes).padStart(2, '0')}`;
 }
+
+// ============================================================================
+// Bulk Operations (Generate & Clone)
+// ============================================================================
+
+/**
+ * Available presets for generate endpoint
+ */
+export type SlotDefinitionPreset =
+  | 'workday_standard'    // Mon-Fri, 8am-10pm, 90min
+  | 'weekend_extended'    // Sat-Sun, 7am-11pm, 90min
+  | 'all_week_uniform'    // Every day, 8am-10pm, 90min
+  | 'hourly_daytime';     // Mon-Fri, 9am-6pm, 60min
+
+/**
+ * Preset metadata for UI display
+ */
+export interface PresetInfo {
+  id: SlotDefinitionPreset;
+  name: string;
+  description: string;
+  days: string;
+  hours: string;
+  duration: string;
+}
+
+export const PRESET_OPTIONS: PresetInfo[] = [
+  {
+    id: 'workday_standard',
+    name: 'Weekday Standard',
+    description: 'Standard weekday operations',
+    days: 'Mon-Fri',
+    hours: '8am-10pm',
+    duration: '90min slots',
+  },
+  {
+    id: 'weekend_extended',
+    name: 'Weekend Extended',
+    description: 'Weekend with early/late slots',
+    days: 'Sat-Sun',
+    hours: '7am-11pm',
+    duration: '90min slots',
+  },
+  {
+    id: 'all_week_uniform',
+    name: 'All Week Uniform',
+    description: 'Uniform schedule year-round',
+    days: 'Every day',
+    hours: '8am-10pm',
+    duration: '90min slots',
+  },
+  {
+    id: 'hourly_daytime',
+    name: 'Hourly Daytime',
+    description: 'Short slots for busy periods',
+    days: 'Mon-Fri',
+    hours: '9am-6pm',
+    duration: '60min slots',
+  },
+];
+
+/**
+ * Pattern overrides for customizing presets
+ */
+export interface PatternOverrides {
+  days?: DayOfWeek[];
+  start_time?: string; // HH:MM:SS
+  end_time?: string; // HH:MM:SS
+  duration_minutes?: number;
+  interval_minutes?: number;
+  capacity?: number;
+}
+
+/**
+ * Generate endpoint request
+ */
+export interface GenerateSlotDefinitionsRequest {
+  preset: SlotDefinitionPreset;
+  court_ids: number[];
+  pattern_overrides?: PatternOverrides;
+  valid_from?: string; // YYYY-MM-DD
+  valid_to?: string; // YYYY-MM-DD
+}
+
+/**
+ * Skipped slot info
+ */
+export interface SkippedSlot {
+  court_id: number;
+  dow: DayOfWeek;
+  starts_at: string;
+  reason: string;
+}
+
+/**
+ * Generate endpoint response
+ */
+export interface GenerateSlotDefinitionsResponse {
+  status: 'success';
+  data: {
+    created_count: number;
+    skipped_count?: number;
+    created_definitions: SlotDefinition[];
+    skipped?: SkippedSlot[];
+  };
+}
+
+/**
+ * Clone endpoint request
+ */
+export interface CloneSlotDefinitionRequest {
+  target_court_ids: number[];
+  target_days?: DayOfWeek[];
+  valid_from?: string; // YYYY-MM-DD
+  valid_to?: string; // YYYY-MM-DD
+}
+
+/**
+ * Clone endpoint response
+ */
+export interface CloneSlotDefinitionResponse {
+  status: 'success';
+  data: {
+    created_count: number;
+    skipped_count?: number;
+    created_definitions: SlotDefinition[];
+    skipped?: SkippedSlot[];
+  };
+}