diff --git a/frontend/src/api/frontApis.ts b/frontend/src/api/frontApis.ts
index 1d53dc5..548957a 100644
--- a/frontend/src/api/frontApis.ts
+++ b/frontend/src/api/frontApis.ts
@@ -1,5 +1,7 @@
 import type {
   AvailableGraphsResponse,
+  ConversationListItem,
+  ConversationMessageItem,
   GraphConfigListResponse,
   GraphConfigReadResponse,
   GraphConfigUpsertRequest,
@@ -10,6 +12,8 @@ import type {
   McpToolConfigUpdateResponse,
   PipelineCreateRequest,
   PipelineCreateResponse,
+  PipelineConversationListResponse,
+  PipelineConversationMessagesResponse,
   PipelineListResponse,
   PipelineStopResponse,
 } from "../types";
@@ -138,3 +142,23 @@ export function stopPipeline(pipelineId: string): Promise<PipelineStopResponse>
   });
 }
 
+export async function listPipelineConversations(
+  pipelineId: string,
+  limit = 100
+): Promise<ConversationListItem[]> {
+  const response = await fetchJson<PipelineConversationListResponse>(
+    `/v1/pipelines/${encodeURIComponent(pipelineId)}/conversations?limit=${limit}`
+  );
+  return response.items || [];
+}
+
+export async function getPipelineConversationMessages(
+  pipelineId: string,
+  conversationId: string
+): Promise<ConversationMessageItem[]> {
+  const response = await fetchJson<PipelineConversationMessagesResponse>(
+    `/v1/pipelines/${encodeURIComponent(pipelineId)}/conversations/${encodeURIComponent(conversationId)}/messages`
+  );
+  return response.items || [];
+}
+
diff --git a/frontend/src/types.ts b/frontend/src/types.ts
index 8dda2e4..83b91b5 100644
--- a/frontend/src/types.ts
+++ b/frontend/src/types.ts
@@ -89,6 +89,33 @@ export type PipelineStopResponse = {
   reload_required: boolean;
 };
 
+export type ConversationListItem = {
+  conversation_id: string;
+  pipeline_id: string;
+  message_count: number;
+  last_updated?: string | null;
+};
+
+export type PipelineConversationListResponse = {
+  pipeline_id: string;
+  items: ConversationListItem[];
+  count: number;
+};
+
+export type ConversationMessageItem = {
+  message_type: string;
+  content: string;
+  sequence_number: number;
+  created_at: string;
+};
+
+export type PipelineConversationMessagesResponse = {
+  pipeline_id: string;
+  conversation_id: string;
+  items: ConversationMessageItem[];
+  count: number;
+};
+
 export type McpToolConfigResponse = {
   path: string;
   raw_content: string;