diff --git a/api/src/attachment/schemas/attachment.schema.ts b/api/src/attachment/schemas/attachment.schema.ts
index a46753799..186c4dafa 100644
--- a/api/src/attachment/schemas/attachment.schema.ts
+++ b/api/src/attachment/schemas/attachment.schema.ts
@@ -38,6 +38,7 @@ export class AttachmentStub extends BaseSchema {
   @Prop({
     type: String,
     required: true,
+    index: true,
   })
   name: string;
 
diff --git a/api/src/chat/schemas/subscriber.schema.ts b/api/src/chat/schemas/subscriber.schema.ts
index ba3ea80a6..e87447e6b 100644
--- a/api/src/chat/schemas/subscriber.schema.ts
+++ b/api/src/chat/schemas/subscriber.schema.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2024 Hexastack. All rights reserved.
+ * Copyright © 2025 Hexastack. All rights reserved.
  *
  * Licensed under the GNU Affero General Public License v3.0 (AGPLv3) with the following additional terms:
  * 1. The name "Hexabot" is a trademark of Hexastack. You may not use this name in derivative works without express written permission.
@@ -29,12 +29,14 @@ export class SubscriberStub extends BaseSchema {
   @Prop({
     type: String,
     required: true,
+    index: true,
   })
   first_name: string;
 
   @Prop({
     type: String,
     required: true,
+    index: true,
   })
   last_name: string;
 
@@ -66,6 +68,7 @@ export class SubscriberStub extends BaseSchema {
 
   @Prop({
     type: String,
+    index: true,
   })
   foreign_id: string;
 
@@ -154,7 +157,10 @@ export type SubscriberDocument = THydratedDocument<Subscriber>;
 
 export const SubscriberModel: ModelDefinition = LifecycleHookManager.attach({
   name: Subscriber.name,
-  schema: SchemaFactory.createForClass(SubscriberStub),
+  schema: SchemaFactory.createForClass(SubscriberStub).index({
+    first_name: 1,
+    last_name: 1,
+  }),
 });
 
 export default SubscriberModel.schema;
diff --git a/api/src/cms/schemas/content.schema.ts b/api/src/cms/schemas/content.schema.ts
index 9c98d6f38..2be14611e 100644
--- a/api/src/cms/schemas/content.schema.ts
+++ b/api/src/cms/schemas/content.schema.ts
@@ -34,7 +34,7 @@ export class ContentStub extends BaseSchema {
   /**
    * The title of the content.
    */
-  @Prop({ type: String, required: true })
+  @Prop({ type: String, required: true, index: true })
   title: string;
 
   /**
diff --git a/api/src/nlp/schemas/nlp-sample-entity.schema.ts b/api/src/nlp/schemas/nlp-sample-entity.schema.ts
index cfe25c3ec..f1d8c3afc 100644
--- a/api/src/nlp/schemas/nlp-sample-entity.schema.ts
+++ b/api/src/nlp/schemas/nlp-sample-entity.schema.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2024 Hexastack. All rights reserved.
+ * Copyright © 2025 Hexastack. All rights reserved.
  *
  * Licensed under the GNU Affero General Public License v3.0 (AGPLv3) with the following additional terms:
  * 1. The name "Hexabot" is a trademark of Hexastack. You may not use this name in derivative works without express written permission.
@@ -107,7 +107,10 @@ export type NlpSampleEntityDocument = THydratedDocument<NlpSampleEntity>;
 export const NlpSampleEntityModel: ModelDefinition =
   LifecycleHookManager.attach({
     name: NlpSampleEntity.name,
-    schema: SchemaFactory.createForClass(NlpSampleEntityStub),
+    schema: SchemaFactory.createForClass(NlpSampleEntityStub).index(
+      { sample: 1, entity: 1, value: 1 },
+      { unique: true },
+    ),
   });
 
 export default NlpSampleEntityModel.schema;
diff --git a/api/src/nlp/schemas/nlp-sample.schema.ts b/api/src/nlp/schemas/nlp-sample.schema.ts
index 2a33ab964..38c80e3c7 100644
--- a/api/src/nlp/schemas/nlp-sample.schema.ts
+++ b/api/src/nlp/schemas/nlp-sample.schema.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2024 Hexastack. All rights reserved.
+ * Copyright © 2025 Hexastack. All rights reserved.
  *
  * Licensed under the GNU Affero General Public License v3.0 (AGPLv3) with the following additional terms:
  * 1. The name "Hexabot" is a trademark of Hexastack. You may not use this name in derivative works without express written permission.
@@ -26,7 +26,7 @@ export class NlpSampleStub extends BaseSchema {
   /**
    * The content of the sample.
    */
-  @Prop({ type: String, required: true })
+  @Prop({ type: String, required: true, index: true })
   text: string;
 
   /**
diff --git a/api/src/nlp/schemas/nlp-value.schema.ts b/api/src/nlp/schemas/nlp-value.schema.ts
index aef7149a9..347490ffe 100644
--- a/api/src/nlp/schemas/nlp-value.schema.ts
+++ b/api/src/nlp/schemas/nlp-value.schema.ts
@@ -119,7 +119,10 @@ export type NlpValueDocument = THydratedDocument<NlpValue>;
 
 export const NlpValueModel: ModelDefinition = LifecycleHookManager.attach({
   name: NlpValue.name,
-  schema: SchemaFactory.createForClass(NlpValueStub),
+  schema: SchemaFactory.createForClass(NlpValueStub).index(
+    { value: 1, entity: 1 },
+    { unique: true },
+  ),
 });
 
 export default NlpValueModel.schema;