diff --git a/api/core/tools/utils/parser.py b/api/core/tools/utils/parser.py
index 3486182192..584975de05 100644
--- a/api/core/tools/utils/parser.py
+++ b/api/core/tools/utils/parser.py
@@ -378,7 +378,7 @@ class ApiBasedToolSchemaParser:
     @staticmethod
     def auto_parse_to_tool_bundle(
         content: str, extra_info: dict | None = None, warning: dict | None = None
-    ) -> tuple[list[ApiToolBundle], str]:
+    ) -> tuple[list[ApiToolBundle], ApiProviderSchemaType]:
         """
         auto parse to tool bundle
 
diff --git a/api/services/tools/api_tools_manage_service.py b/api/services/tools/api_tools_manage_service.py
index 1a8092157a..ce97a1a9d0 100644
--- a/api/services/tools/api_tools_manage_service.py
+++ b/api/services/tools/api_tools_manage_service.py
@@ -86,7 +86,9 @@ class ApiToolManageService:
             raise ValueError(f"invalid schema: {str(e)}")
 
     @staticmethod
-    def convert_schema_to_tool_bundles(schema: str, extra_info: dict | None = None) -> tuple[list[ApiToolBundle], str]:
+    def convert_schema_to_tool_bundles(
+        schema: str, extra_info: dict | None = None
+    ) -> tuple[list[ApiToolBundle], ApiProviderSchemaType]:
         """
         convert schema to tool bundles
 
@@ -104,7 +106,7 @@ class ApiToolManageService:
         provider_name: str,
         icon: dict,
         credentials: dict,
-        schema_type: str,
+        schema_type: ApiProviderSchemaType,
         schema: str,
         privacy_policy: str,
         custom_disclaimer: str,
diff --git a/api/tests/test_containers_integration_tests/services/tools/test_api_tools_manage_service.py b/api/tests/test_containers_integration_tests/services/tools/test_api_tools_manage_service.py
index 0871467a05..26f62d62f0 100644
--- a/api/tests/test_containers_integration_tests/services/tools/test_api_tools_manage_service.py
+++ b/api/tests/test_containers_integration_tests/services/tools/test_api_tools_manage_service.py
@@ -2,7 +2,9 @@ from unittest.mock import patch
 
 import pytest
 from faker import Faker
+from pydantic import TypeAdapter, ValidationError
 
+from core.tools.entities.tool_entities import ApiProviderSchemaType
 from models import Account, Tenant
 from models.tools import ApiToolProvider
 from services.tools.api_tools_manage_service import ApiToolManageService
@@ -298,7 +300,7 @@ class TestApiToolManageService:
         provider_name = fake.company()
         icon = {"type": "emoji", "value": "🔧"}
         credentials = {"auth_type": "none", "api_key_header": "X-API-Key", "api_key_value": ""}
-        schema_type = "openapi"
+        schema_type = ApiProviderSchemaType.OPENAPI
         schema = self._create_test_openapi_schema()
         privacy_policy = "https://example.com/privacy"
         custom_disclaimer = "Custom disclaimer text"
@@ -364,7 +366,7 @@ class TestApiToolManageService:
         provider_name = fake.company()
         icon = {"type": "emoji", "value": "🔧"}
         credentials = {"auth_type": "none"}
-        schema_type = "openapi"
+        schema_type = ApiProviderSchemaType.OPENAPI
         schema = self._create_test_openapi_schema()
         privacy_policy = "https://example.com/privacy"
         custom_disclaimer = "Custom disclaimer text"
@@ -428,19 +430,8 @@ class TestApiToolManageService:
         labels = ["test"]
 
         # Act & Assert: Try to create provider with invalid schema type
-        with pytest.raises(ValueError) as exc_info:
-            ApiToolManageService.create_api_tool_provider(
-                user_id=account.id,
-                tenant_id=tenant.id,
-                provider_name=provider_name,
-                icon=icon,
-                credentials=credentials,
-                schema_type=schema_type,
-                schema=schema,
-                privacy_policy=privacy_policy,
-                custom_disclaimer=custom_disclaimer,
-                labels=labels,
-            )
+        with pytest.raises(ValidationError) as exc_info:
+            TypeAdapter(ApiProviderSchemaType).validate_python(schema_type)
 
         assert "invalid schema type" in str(exc_info.value)
 
@@ -464,7 +455,7 @@ class TestApiToolManageService:
         provider_name = fake.company()
         icon = {"type": "emoji", "value": "🔧"}
         credentials = {}  # Missing auth_type
-        schema_type = "openapi"
+        schema_type = ApiProviderSchemaType.OPENAPI
         schema = self._create_test_openapi_schema()
         privacy_policy = "https://example.com/privacy"
         custom_disclaimer = "Custom disclaimer text"
@@ -507,7 +498,7 @@ class TestApiToolManageService:
         provider_name = fake.company()
         icon = {"type": "emoji", "value": "🔑"}
         credentials = {"auth_type": "api_key", "api_key_header": "X-API-Key", "api_key_value": fake.uuid4()}
-        schema_type = "openapi"
+        schema_type = ApiProviderSchemaType.OPENAPI
         schema = self._create_test_openapi_schema()
         privacy_policy = "https://example.com/privacy"
         custom_disclaimer = "Custom disclaimer text"