diff --git a/ucloud/client.py b/ucloud/client.py
index 0ed2543..2fcdc0d 100644
--- a/ucloud/client.py
+++ b/ucloud/client.py
@@ -14,6 +14,13 @@ def pathx(self):
 
         return PathXClient(self._config, self.transport, self.middleware, self.logger)
 
+    def stepflow(self):
+        from ucloud.services.stepflow.client import StepFlowClient
+
+        return StepFlowClient(
+            self._config, self.transport, self.middleware, self.logger
+        )
+
     def uaccount(self):
         from ucloud.services.uaccount.client import UAccountClient
 
diff --git a/ucloud/core/client/_client.py b/ucloud/core/client/_client.py
index fe2a1f5..d60405c 100644
--- a/ucloud/core/client/_client.py
+++ b/ucloud/core/client/_client.py
@@ -80,7 +80,7 @@ def _send(self, action, args, **options):
             resp = handler(resp)
         if int(resp.get("RetCode", -1)) != 0:
             raise exc.RetCodeException(
-                action=req.json.get("Action"),
+                action=req.data.get("Action"),
                 code=int(resp.get("RetCode")),
                 message=resp.get("Message"),
             )
diff --git a/ucloud/services/stepflow/__init__.py b/ucloud/services/stepflow/__init__.py
new file mode 100644
index 0000000..4c48b5a
--- /dev/null
+++ b/ucloud/services/stepflow/__init__.py
@@ -0,0 +1 @@
+# -*- coding: utf-8 -*-
diff --git a/ucloud/services/stepflow/client.py b/ucloud/services/stepflow/client.py
new file mode 100644
index 0000000..3685949
--- /dev/null
+++ b/ucloud/services/stepflow/client.py
@@ -0,0 +1,82 @@
+# -*- coding: utf-8 -*-
+
+""" Code is generated by ucloud-model, DO NOT EDIT IT. """
+from ucloud.core.client import Client
+from ucloud.services.stepflow.schemas import apis
+
+
+class StepFlowClient(Client):
+    def __init__(self, config, transport=None, middleware=None, logger=None):
+        super(StepFlowClient, self).__init__(config, transport, middleware, logger)
+
+    def create_sf_workflow_from_template(self, req=None, **kwargs):
+        """ CreateSFWorkflowFromTemplate - 导入工作流定义
+
+        **Request**
+
+        - **ProjectId** (str) - (Config) 项目ID。不填写为默认项目，子帐号必须填写。 请参考 `GetProjectList接口 <https://docs.ucloud.cn/api/summary/get_project_list.html>`_ 
+        - **Region** (str) - (Config) 地域。 参见  `地域和可用区列表 <https://docs.ucloud.cn/api/summary/regionlist.html>`_ 
+        - **Namespace** (str) - (Required) 需要创建的工作流namespace
+        - **Workflow** (str) - (Required) 描述工作流定义的base64字符串
+        - **WorkflowName** (str) - (Required) 需要创建的工作流名称
+        
+        **Response**
+
+        - **Message** (str) - 返回消息
+        - **Version** (int) - 创建的工作流版本号
+        
+        """
+        d = {"ProjectId": self.config.project_id, "Region": self.config.region}
+        req and d.update(req)
+        d = apis.CreateSFWorkflowFromTemplateRequestSchema().dumps(d)
+        kwargs["max_retries"] = 0
+        resp = self.invoke("CreateSFWorkflowFromTemplate", d, **kwargs)
+        return apis.CreateSFWorkflowFromTemplateResponseSchema().loads(resp)
+
+    def get_sf_workflow_template(self, req=None, **kwargs):
+        """ GetSFWorkflowTemplate - 导出工作流定义
+
+        **Request**
+
+        - **ProjectId** (str) - (Config) 项目ID。不填写为默认项目，子帐号必须填写。 请参考 `GetProjectList接口 <https://docs.ucloud.cn/api/summary/get_project_list.html>`_ 
+        - **Region** (str) - (Config) 地域。 参见  `地域和可用区列表 <https://docs.ucloud.cn/api/summary/regionlist.html>`_ 
+        - **WorkflowId** (str) - (Required) 被导出工作流的Id
+        - **WorkflowVersion** (int) - 被导出工作流的版本号。取值范围：WorkflowVersion >= 1；默认会获取发布版本对应的workflow；超过最大版本会返回错误
+        
+        **Response**
+
+        - **Message** (str) - 返回消息
+        - **Version** (int) - 导出工作流的版本号
+        - **Workflow** (dict) - 见 **WorkflowTemplate** 模型定义
+        - **WorkflowId** (str) - 导出工作流的Id
+        
+        **Response Model**
+        
+        **Param** 
+        
+        - **Name** (str) - 参数名称
+        - **Type** (str) - 参数类型
+        - **Value** (str) - 参数值
+
+        **ActivityTemplate** 
+        
+        - **Input** (dict) - Activity的输入
+        - **Name** (str) - Activity的名字
+        - **Next** (str) - 下一个Activity的名字
+        - **Output** (list) - Activity的输出，详见Param
+        - **RetryTimes** (str) - Activity的重试次数
+        - **Timeout** (str) - Activity的超时时间
+        - **Type** (str) - Activity的类型
+
+        **WorkflowTemplate** 
+        
+        - **Activites** (list) - 见 **ActivityTemplate** 模型定义
+        - **Input** (list) - 见 **Param** 模型定义
+        - **Output** (list) - 见 **Param** 模型定义
+
+        """
+        d = {"ProjectId": self.config.project_id, "Region": self.config.region}
+        req and d.update(req)
+        d = apis.GetSFWorkflowTemplateRequestSchema().dumps(d)
+        resp = self.invoke("GetSFWorkflowTemplate", d, **kwargs)
+        return apis.GetSFWorkflowTemplateResponseSchema().loads(resp)
diff --git a/ucloud/services/stepflow/schemas/__init__.py b/ucloud/services/stepflow/schemas/__init__.py
new file mode 100644
index 0000000..4c48b5a
--- /dev/null
+++ b/ucloud/services/stepflow/schemas/__init__.py
@@ -0,0 +1 @@
+# -*- coding: utf-8 -*-
diff --git a/ucloud/services/stepflow/schemas/apis.py b/ucloud/services/stepflow/schemas/apis.py
new file mode 100644
index 0000000..9fa5d40
--- /dev/null
+++ b/ucloud/services/stepflow/schemas/apis.py
@@ -0,0 +1,67 @@
+# -*- coding: utf-8 -*-
+
+""" Code is generated by ucloud-model, DO NOT EDIT IT. """
+from ucloud.core.typesystem import schema, fields
+from ucloud.services.stepflow.schemas import models
+
+""" StepFlow API Schema
+"""
+"""
+API: CreateSFWorkflowFromTemplate
+
+导入工作流定义
+"""
+
+
+class CreateSFWorkflowFromTemplateRequestSchema(schema.RequestSchema):
+    """ CreateSFWorkflowFromTemplate - 导入工作流定义
+    """
+
+    fields = {
+        "Namespace": fields.Str(required=True, dump_to="Namespace"),
+        "ProjectId": fields.Str(required=False, dump_to="ProjectId"),
+        "Region": fields.Str(required=True, dump_to="Region"),
+        "Workflow": fields.Base64(required=True, dump_to="Workflow"),
+        "WorkflowName": fields.Str(required=True, dump_to="WorkflowName"),
+    }
+
+
+class CreateSFWorkflowFromTemplateResponseSchema(schema.ResponseSchema):
+    """ CreateSFWorkflowFromTemplate - 导入工作流定义
+    """
+
+    fields = {
+        "Message": fields.Str(required=True, load_from="Message"),
+        "Version": fields.Int(required=True, load_from="Version"),
+    }
+
+
+"""
+API: GetSFWorkflowTemplate
+
+导出工作流定义
+"""
+
+
+class GetSFWorkflowTemplateRequestSchema(schema.RequestSchema):
+    """ GetSFWorkflowTemplate - 导出工作流定义
+    """
+
+    fields = {
+        "ProjectId": fields.Str(required=False, dump_to="ProjectId"),
+        "Region": fields.Str(required=True, dump_to="Region"),
+        "WorkflowId": fields.Str(required=True, dump_to="WorkflowId"),
+        "WorkflowVersion": fields.Int(required=False, dump_to="WorkflowVersion"),
+    }
+
+
+class GetSFWorkflowTemplateResponseSchema(schema.ResponseSchema):
+    """ GetSFWorkflowTemplate - 导出工作流定义
+    """
+
+    fields = {
+        "Message": fields.Str(required=False, load_from="Message"),
+        "Version": fields.Int(required=True, load_from="Version"),
+        "Workflow": models.WorkflowTemplateSchema(),
+        "WorkflowId": fields.Str(required=True, load_from="WorkflowId"),
+    }
diff --git a/ucloud/services/stepflow/schemas/models.py b/ucloud/services/stepflow/schemas/models.py
new file mode 100644
index 0000000..b6d5122
--- /dev/null
+++ b/ucloud/services/stepflow/schemas/models.py
@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+
+""" Code is generated by ucloud-model, DO NOT EDIT IT. """
+from ucloud.core.typesystem import schema, fields
+
+
+class ParamSchema(schema.ResponseSchema):
+    """ Param - 工作流参数
+    """
+
+    fields = {
+        "Name": fields.Str(required=False, load_from="Name"),
+        "Type": fields.Str(required=False, load_from="Type"),
+        "Value": fields.Str(required=False, load_from="Value"),
+    }
+
+
+class ActivityTemplateSchema(schema.ResponseSchema):
+    """ ActivityTemplate - 工作流的Activity定义
+    """
+
+    fields = {
+        "Input": fields.Str(),
+        "Name": fields.Str(required=False, load_from="Name"),
+        "Next": fields.Str(required=False, load_from="Next"),
+        "Output": fields.List(fields.Str()),
+        "RetryTimes": fields.Str(required=False, load_from="RetryTimes"),
+        "Timeout": fields.Str(required=False, load_from="Timeout"),
+        "Type": fields.Str(required=False, load_from="Type"),
+    }
+
+
+class WorkflowTemplateSchema(schema.ResponseSchema):
+    """ WorkflowTemplate - Workflow对象定义
+    """
+
+    fields = {
+        "Activites": fields.List(ActivityTemplateSchema()),
+        "Input": fields.List(ParamSchema()),
+        "Output": fields.List(ParamSchema()),
+    }
diff --git a/ucloud/version.py b/ucloud/version.py
index 5045509..e9a17d9 100644
--- a/ucloud/version.py
+++ b/ucloud/version.py
@@ -1,3 +1,3 @@
 # -*- coding: utf-8 -*-
 
-version = "0.2.0"
+version = "0.3.0"