diff --git a/base/src/com/google/idea/blaze/base/ext/IntelliJExtManager.java b/base/src/com/google/idea/blaze/base/ext/IntelliJExtManager.java
index b8f56567b39..89036b4abd3 100644
--- a/base/src/com/google/idea/blaze/base/ext/IntelliJExtManager.java
+++ b/base/src/com/google/idea/blaze/base/ext/IntelliJExtManager.java
@@ -64,6 +64,9 @@ public class IntelliJExtManager {
    */
   private static final String EXPERIMENT_SERVICE_PROPERTY = "use.intellij.ext.experiments";
 
+  private static final BoolExperiment CHATBOT =
+      new BoolExperiment("use.intellij.ext.chatbot", false);
+
   public static IntelliJExtManager getInstance() {
     return ApplicationManager.getApplication().getService(IntelliJExtManager.class);
   }
@@ -132,4 +135,8 @@ public boolean isKytheEnabled() {
   public static boolean isExperimentsServiceEnabled() {
     return Objects.equals(System.getProperty(EXPERIMENT_SERVICE_PROPERTY), "1");
   }
+
+  public boolean isChatBotEnabled() {
+    return isEnabled() && CHATBOT.getValue();
+  }
 }
diff --git a/ext/proto/BUILD b/ext/proto/BUILD
index 367bf40ebe3..ced2c6b5d03 100644
--- a/ext/proto/BUILD
+++ b/ext/proto/BUILD
@@ -5,6 +5,7 @@ proto_library(
     name = "intellijext_proto",
     srcs = [
         "build_service.proto",
+        "chatbotmodel.proto",
         "experiments.proto",
         "intellijext.proto",
         "issuetracker.proto",
diff --git a/ext/proto/chatbotmodel.proto b/ext/proto/chatbotmodel.proto
new file mode 100644
index 00000000000..bdb6f8c9bc2
--- /dev/null
+++ b/ext/proto/chatbotmodel.proto
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2023 The Bazel Authors. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+syntax = "proto3";
+
+package com.google.idea.blaze.ext;
+
+option java_package = "com.google.idea.blaze.ext";
+option java_multiple_files = true;
+option java_outer_classname = "ChatBotModelProto";
+
+
+// Request message for [GenerateAnswers].
+message GenerateAnswersRequest {
+  // Specified when a message is continuing an existing session.
+  optional string session_id = 1;
+
+    // Identifies which chatbot or model to query.
+  optional string model_id = 2;
+
+  // Unformatted user prompt.
+  optional string text = 3;
+}
+
+message GenerateAnswersResponse {
+  optional Message response = 1;
+}
+
+message Timestamp {
+  // Represents seconds of UTC time since Unix epoch
+  // 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
+  // 9999-12-31T23:59:59Z inclusive.
+  optional int64 seconds = 1;
+
+  // Non-negative fractions of a second at nanosecond resolution. Negative
+  // second values with fractions must still have non-negative nanos values
+  // that count forward in time. Must be from 0 to 999,999,999
+  // inclusive.
+  optional int32 nanos = 2;
+}
+
+// A chat message.
+message Message {
+  // The ID of the message.
+  optional string message_id = 1;
+
+  // The ID of the session.
+  optional string session_id = 2;
+
+  // The unformatted contents of the message.
+  optional string text = 3;
+
+  // Identifies which model the message is associated with.
+  optional string model_id = 4;
+
+  optional Timestamp creation_timestamp = 5;
+
+  repeated RelatedResources related_resources = 6;
+}
+
+message RelatedResources {
+  // Identifies the origin url of the resource.
+  optional string url = 1;
+
+  // Identifies the title associated with the resource.
+  optional string title = 2;
+}
+
+service ChatBotModel {
+  // Returns GenerateAnswersResponse given GenerateAnswersRequest
+  rpc GenerateAnswers(GenerateAnswersRequest)
+      returns (GenerateAnswersResponse) {}
+}
diff --git a/ext/src/com/google/idea/blaze/ext/IntelliJExtClient.java b/ext/src/com/google/idea/blaze/ext/IntelliJExtClient.java
index 659be3572eb..f27cd45c8f9 100644
--- a/ext/src/com/google/idea/blaze/ext/IntelliJExtClient.java
+++ b/ext/src/com/google/idea/blaze/ext/IntelliJExtClient.java
@@ -16,6 +16,7 @@
 package com.google.idea.blaze.ext;
 
 import com.google.idea.blaze.ext.BuildServiceGrpc.BuildServiceFutureStub;
+import com.google.idea.blaze.ext.ChatBotModelGrpc.ChatBotModelBlockingStub;
 import com.google.idea.blaze.ext.ExperimentsServiceGrpc.ExperimentsServiceBlockingStub;
 import com.google.idea.blaze.ext.IntelliJExtGrpc.IntelliJExtBlockingStub;
 import com.google.idea.blaze.ext.IssueTrackerGrpc.IssueTrackerBlockingStub;
@@ -78,6 +79,10 @@ public ExperimentsServiceBlockingStub getExperimentsService() {
     return ExperimentsServiceGrpc.newBlockingStub(channel);
   }
 
+  public ChatBotModelBlockingStub getChatBotModelService() {
+    return ChatBotModelGrpc.newBlockingStub(channel);
+  }
+
   public LinterFutureStub getLinterService() {
     return LinterGrpc.newFutureStub(channel);
   }
diff --git a/ext/src/com/google/idea/blaze/ext/IntelliJExtService.java b/ext/src/com/google/idea/blaze/ext/IntelliJExtService.java
index 14d19405233..ba95d70d6b1 100644
--- a/ext/src/com/google/idea/blaze/ext/IntelliJExtService.java
+++ b/ext/src/com/google/idea/blaze/ext/IntelliJExtService.java
@@ -17,6 +17,7 @@
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.idea.blaze.ext.BuildServiceGrpc.BuildServiceFutureStub;
+import com.google.idea.blaze.ext.ChatBotModelGrpc.ChatBotModelBlockingStub;
 import com.google.idea.blaze.ext.ExperimentsServiceGrpc.ExperimentsServiceBlockingStub;
 import com.google.idea.blaze.ext.IntelliJExtGrpc.IntelliJExtBlockingStub;
 import com.google.idea.blaze.ext.IssueTrackerGrpc.IssueTrackerBlockingStub;
@@ -159,6 +160,11 @@ public ExperimentsServiceBlockingStub getExperimentsService() throws IOException
     return client.getExperimentsService();
   }
 
+  public ChatBotModelBlockingStub getChatBotModelService() throws IOException {
+    IntelliJExtBlockingStub unused = connect();
+    return client.getChatBotModelService();
+  }
+
   public LinterFutureStub getLinterService() throws IOException {
     IntelliJExtBlockingStub unused = connect();
     return client.getLinterService();