# MCPServerAdapter does not have transport as an argument \[Streamable-http\] **URL:** \ **Category:** CrewAI Community Support\ **Tags:** tools\_issues, agent, crewai, feature\ **Created:** [July 21, 2025, 8:45pm UTC](https://community.crewai.com/t/mcpserveradapter-does-not-have-transport-as-an-argument-streamable-http/6644 "2025-07-21T20:45:22Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Pratik\_Kumar](https://sea1.discourse-cdn.com/flex025/user_avatar/community.crewai.com/pratik_kumar/32/2736_2.png) [@Pratik\_Kumar](https://community.crewai.com/u/Pratik_Kumar)\ **Post date:** [July 21, 2025, 8:45pm UTC](https://community.crewai.com/t/mcpserveradapter-does-not-have-transport-as-an-argument-streamable-http/6644/1 "2025-07-21T20:45:22Z")
Hi folks been trying to run a crew using tools from a MCP server with Streamable-Http as a transport. Although works well enough with the same server when i change the transport of server to SSE without giving any transport argument in my ServerParam. Also this code is in crew template using CrewBase. Here’s the code ``` from crewai import Agent, Crew, Process, Task from crewai.project import CrewBase, agent, crew, task from crewai.agents.agent_builder.base_agent import BaseAgent from typing import List import os from crewai import Agent, Crew, Process, Task,LLM from crewai.project import CrewBase, agent, crew, task from crewai.agents.agent_builder.base_agent import BaseAgent from typing import List, Optional,Dict,Any,Literal from pydantic import BaseModel from crewai_tools import MCPServerAdapter from dotenv import load_dotenv load_dotenv() token="jfdnksah" # Initialize the LLM using environment variables llm = LLM( model="azure/gpt-4o" ) @CrewBase class Crew(): """ crew""" agents_config="config/agents.yaml" task_config="config/tasks.yaml" def __init__ (self): super(). __init__ () self._start_mcp() def _start_mcp(self): server_params = { "url": "http://localhost:80o0/mcp/", "transport": "streamable-http", "headers": { "Authorization": f"Bearer {token}" } } self.mcp_adapter = MCPServerAdapter(server_params) self.mcp_tools = self.mcp_adapter.tools for tool in self.mcp_tools: print(f"Loaded tool: {tool.name}") @agent def snow_manager(self) -> Agent: return Agent( config=self.agents_config['manager'], # type: ignore[index] verbose=True, llm=llm, tools=self.mcp_tools ) @task def research_task(self) -> Task: return Task( config=self.tasks_config['task'], ) @crew def crew(self) -> Crew: """Creates the SnowCrew crew""" # To learn how to add knowledge sources to your crew, check out the documentation: # https://docs.crewai.com/concepts/knowledge#what-is-knowledge return Crew( agents=self.agents, # Automatically created by the @agent decorator tasks=self.tasks, # Automatically created by the @task decorator process=Process.sequential, verbose=True, chat_llm=llm ) ``` The error i am recieving is ``` Exception in thread Thread-3 (_run_loop): Traceback (most recent call last): File "C:\Users\850081290\AppData\Local\Programs\Python\Python311\Lib\threading.py", line 1045, in _bootstrap_inner self.run() File "C:\Users\850081290\AppData\Local\Programs\Python\Python311\Lib\threading.py", line 982, in run self._target(*self._args, **self._kwargs) File "C:\Users\850081290\Documents\New folder\gen1\Lib\site-packages\mcpadapt\core.py", line 216, in _run_loop self.loop.run_until_complete(self.task) File "C:\Users\850081290\AppData\Local\Programs\Python\Python311\Lib\asyncio\base_events.py", line 654, in run_until_complete return future.result() ^^^^^^^^^^^^^^^ File "C:\Users\850081290\Documents\New folder\gen1\Lib\site-packages\mcpadapt\core.py", line 206, in setup connections = [ ^ File "C:\Users\850081290\Documents\New folder\gen1\Lib\site-packages\mcpadapt\core.py", line 207, in await stack.enter_async_context(mcptools(params)) File "C:\Users\850081290\AppData\Local\Programs\Python\Python311\Lib\contextlib.py", line 650, in enter_async_context result = await _enter(cm) ^^^^^^^^^^^^^^^^ File "C:\Users\850081290\AppData\Local\Programs\Python\Python311\Lib\contextlib.py", line 210, in __aenter__ return await anext(self.gen) ^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\850081290\Documents\New folder\gen1\Lib\site-packages\mcpadapt\core.py", line 98, in mcptools client = sse_client(**serverparams) ^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\850081290\AppData\Local\Programs\Python\Python311\Lib\contextlib.py", line 334, in helper return _AsyncGeneratorContextManager(func, args, kwds) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\850081290\AppData\Local\Programs\Python\Python311\Lib\contextlib.py", line 105, in __init__ self.gen = func(*args, **kwds) ^^^^^^^^^^^^^^^^^^^ TypeError: sse_client() got an unexpected keyword argument 'transport' ``` Everything in this code works fine with sse as transport without giving any transport argument but as soon as the transport is defined as streamable-http in server param its throws an error. Also gives 400 Bad Request if no transport with streamble-http server url given. Please help. ---
**Author:** ![Pratik\_Kumar](https://sea1.discourse-cdn.com/flex025/user_avatar/community.crewai.com/pratik_kumar/32/2736_2.png) [@Pratik\_Kumar](https://community.crewai.com/u/Pratik_Kumar)\ **Post date:** [July 21, 2025, 8:46pm UTC](https://community.crewai.com/t/mcpserveradapter-does-not-have-transport-as-an-argument-streamable-http/6644/2 "2025-07-21T20:46:19Z")
@maxmoura i think you can only help ---
**Author:** ![maxmoura](https://sea1.discourse-cdn.com/flex025/user_avatar/community.crewai.com/maxmoura/32/4206_2.png) [@maxmoura](https://community.crewai.com/u/maxmoura)\ **Post date:** [July 21, 2025, 9:16pm UTC](https://community.crewai.com/t/mcpserveradapter-does-not-have-transport-as-an-argument-streamable-http/6644/3 "2025-07-21T21:16:00Z")
1. Your `url` likely shouldn’t be `http://localhost:80o0/mcp/` (using the letter “o” instead of a zero in the port number). 2. It seems you’re using the [Manual Connection Lifecycle](https://docs.crewai.com/en/mcp/streamable-http#2-manual-connection-lifecycle). I’d recommend following the official documentation’s example step-by-step, ensuring you call `mcp_server_adapter.start()` and explicitly handle `mcp_server_adapter.stop()`. ---
**Author:** ![system](https://us1.discourse-cdn.com/flex025/uploads/crewai/original/1X/ecda97e72f77c7100e0a761444b1c991925cc789.png) [@system](https://community.crewai.com/u/system)\ **Post date:** [July 22, 2025, 9:16pm UTC](https://community.crewai.com/t/mcpserveradapter-does-not-have-transport-as-an-argument-streamable-http/6644/4 "2025-07-22T21:16:28Z")
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