diff --git a/api/app/controllers/__init__.py b/api/app/controllers/__init__.py
index 869eb039..50e9e0b0 100644
--- a/api/app/controllers/__init__.py
+++ b/api/app/controllers/__init__.py
@@ -14,7 +14,6 @@ from . import (
     document_controller,
     emotion_config_controller,
     emotion_controller,
-    end_user_controller,
     file_controller,
     file_storage_controller,
     home_page_controller,
@@ -99,6 +98,5 @@ manager_router.include_router(file_storage_controller.router)
 manager_router.include_router(ontology_controller.router)
 manager_router.include_router(skill_controller.router)
 manager_router.include_router(i18n_controller.router)
-manager_router.include_router(end_user_controller.router)
 
 __all__ = ["manager_router"]
diff --git a/api/app/controllers/end_user_controller.py b/api/app/controllers/end_user_controller.py
deleted file mode 100644
index b9d54fea..00000000
--- a/api/app/controllers/end_user_controller.py
+++ /dev/null
@@ -1,48 +0,0 @@
-"""End User 管理接口 - 无需认证"""
-
-from app.core.logging_config import get_business_logger
-from app.core.response_utils import success
-from app.db import get_db
-from app.repositories.end_user_repository import EndUserRepository
-from app.schemas.memory_api_schema import (
-    CreateEndUserRequest,
-    CreateEndUserResponse,
-)
-from fastapi import APIRouter, Depends
-from sqlalchemy.orm import Session
-
-router = APIRouter(prefix="/end_users", tags=["End Users"])
-logger = get_business_logger()
-
-
-@router.post("")
-async def create_end_user(
-    data: CreateEndUserRequest,
-    db: Session = Depends(get_db),
-):
-    """
-    Create an end user.
-    
-    Creates a new end user for the given workspace.
-    If an end user with the same other_id already exists in the workspace,
-    returns the existing one.
-    """
-    logger.info(f"Create end user request - other_id: {data.other_id}, workspace_id: {data.workspace_id}")
-
-    end_user_repo = EndUserRepository(db)
-    end_user = end_user_repo.get_or_create_end_user(
-        app_id=None,
-        workspace_id=data.workspace_id,
-        other_id=data.other_id,
-    )
-
-    logger.info(f"End user ready: {end_user.id}")
-
-    result = {
-        "id": str(end_user.id),
-        "other_id": end_user.other_id or "",
-        "other_name": end_user.other_name or "",
-        "workspace_id": str(end_user.workspace_id),
-    }
-
-    return success(data=CreateEndUserResponse(**result).model_dump(), msg="End user created successfully")
diff --git a/api/app/controllers/service/memory_api_controller.py b/api/app/controllers/service/memory_api_controller.py
index 08a94a89..dc5e0408 100644
--- a/api/app/controllers/service/memory_api_controller.py
+++ b/api/app/controllers/service/memory_api_controller.py
@@ -6,6 +6,8 @@ from app.core.response_utils import success
 from app.db import get_db
 from app.schemas.api_key_schema import ApiKeyAuth
 from app.schemas.memory_api_schema import (
+    CreateEndUserRequest,
+    CreateEndUserResponse,
     ListConfigsResponse,
     MemoryReadRequest,
     MemoryReadResponse,
@@ -113,3 +115,31 @@ async def list_memory_configs(
 
     logger.info(f"Listed {result['total']} configs for workspace: {api_key_auth.workspace_id}")
     return success(data=ListConfigsResponse(**result).model_dump(), msg="Configs listed successfully")
+
+
+@router.post("/end_users")
+@require_api_key(scopes=["memory"])
+async def create_end_user(
+    request: Request,
+    api_key_auth: ApiKeyAuth = None,
+    db: Session = Depends(get_db),
+):
+    """
+    Create an end user.
+    
+    Creates a new end user for the authorized workspace.
+    If an end user with the same other_id already exists, returns the existing one.
+    """
+    body = await request.json()
+    payload = CreateEndUserRequest(**body)
+    logger.info(f"Create end user request - other_id: {payload.other_id}, workspace_id: {api_key_auth.workspace_id}")
+
+    memory_api_service = MemoryAPIService(db)
+
+    result = memory_api_service.create_end_user(
+        workspace_id=api_key_auth.workspace_id,
+        other_id=payload.other_id,
+    )
+
+    logger.info(f"End user ready: {result['id']}")
+    return success(data=CreateEndUserResponse(**result).model_dump(), msg="End user created successfully")
diff --git a/api/app/core/memory/agent/langgraph_graph/read_graph.py b/api/app/core/memory/agent/langgraph_graph/read_graph.py
index bddae618..e698e6ad 100644
--- a/api/app/core/memory/agent/langgraph_graph/read_graph.py
+++ b/api/app/core/memory/agent/langgraph_graph/read_graph.py
@@ -15,7 +15,7 @@ from app.core.memory.agent.langgraph_graph.nodes.problem_nodes import (
     Problem_Extension,
 )
 from app.core.memory.agent.langgraph_graph.nodes.retrieve_nodes import (
-    retrieve,
+    retrieve_nodes,
 )
 from app.core.memory.agent.langgraph_graph.nodes.summary_nodes import (
     Input_Summary,
@@ -53,8 +53,8 @@ async def make_read_graph():
         workflow.add_node("Split_The_Problem", Split_The_Problem)
         workflow.add_node("Problem_Extension", Problem_Extension)
         workflow.add_node("Input_Summary", Input_Summary)
-        # workflow.add_node("Retrieve", retrieve_nodes)
-        workflow.add_node("Retrieve", retrieve)
+        workflow.add_node("Retrieve", retrieve_nodes)
+        # workflow.add_node("Retrieve", retrieve)
         workflow.add_node("Verify", Verify)
         workflow.add_node("Retrieve_Summary", Retrieve_Summary)
         workflow.add_node("Summary", Summary)
diff --git a/api/app/services/memory_api_service.py b/api/app/services/memory_api_service.py
index 9282fc28..f62f526c 100644
--- a/api/app/services/memory_api_service.py
+++ b/api/app/services/memory_api_service.py
@@ -280,6 +280,53 @@ class MemoryAPIService:
                 code=BizCode.MEMORY_READ_FAILED
             )
 
+    def create_end_user(
+            self,
+            workspace_id: uuid.UUID,
+            other_id: str,
+    ) -> Dict[str, Any]:
+        """Create or retrieve an end user for the workspace.
+        
+        Uses get_or_create semantics: if an end user with the same other_id
+        already exists in the workspace, returns the existing one.
+        
+        Args:
+            workspace_id: Workspace ID from API key authorization
+            other_id: External user identifier
+            
+        Returns:
+            Dict with id, other_id, other_name, and workspace_id
+            
+        Raises:
+            BusinessException: If creation fails
+        """
+        logger.info(f"Creating end user - other_id: {other_id}, workspace_id: {workspace_id}")
+
+        try:
+            from app.repositories.end_user_repository import EndUserRepository
+
+            end_user_repo = EndUserRepository(self.db)
+            end_user = end_user_repo.get_or_create_end_user(
+                app_id=None,
+                workspace_id=workspace_id,
+                other_id=other_id,
+            )
+
+            logger.info(f"End user ready: {end_user.id}")
+            return {
+                "id": str(end_user.id),
+                "other_id": end_user.other_id or "",
+                "other_name": end_user.other_name or "",
+                "workspace_id": str(end_user.workspace_id),
+            }
+
+        except Exception as e:
+            logger.error(f"Failed to create end user for workspace {workspace_id}: {e}")
+            raise BusinessException(
+                message=f"Failed to create end user: {str(e)}",
+                code=BizCode.INTERNAL_ERROR
+            )
+
     def list_memory_configs(
             self,
             workspace_id: uuid.UUID,