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hi!
Inquiry Regarding 500 Error on tools/list Endpoint in MCP Server
Hello,
I am currently testing the Notion integration feature with the remote MCP server using Python.
The project creation, connection, and Notion linking have all been completed successfully.
However, I am consistently receiving a 500 error when calling the tools/list endpoint as shown below.
Reproduction Code (Summary)
# python
def list_notion_tools(external_user_id: str):
token = get_access_token()
url = f"
https://remote.mcp.pipedream.net/{external_user_id}/notion"
headers = {
"Authorization": f"Bearer {token}",
"x-pd-project-id": PROJECT_ID,
"x-pd-environment": ENVIRONMENT,
"x-pd-external-user-id": external_user_id,
"x-pd-app-slug": "notion",
"Accept": "text/event-stream"
}
# Get endpoint and session_id via SSE connection
with requests.get(url, headers=headers, stream=True) as r:
for ev in sseclient.SSEClient(r).events():
if ev.event == "endpoint":
endpoint = "https://remote.mcp.pipedream.net" + ev.data
session_id = ev.data.split("?sessionId=")[-1]
break
# Call tools/list
rpc_hdr = {****headers, "Mcp-Session-Id": session_id, "Content-Type": "application/json"}
rpc_hdr.pop("Accept")
rpc_body = {"jsonrpc": "2.0", "id": 1, "method": "tools/list", "params": {}}
res = [requests.post](http://requests.post)(endpoint, headers=rpc_hdr, json=rpc_body, timeout=30)
res.raise_for_status()
return res.json()["result"]["tools"]
Error
requests.exceptions.HTTPError: 500 Server Error: Internal Server Error for url: https://remote.mcp.pipedream.net/v1/*************************/notion/messages?sessionId=f8b13124-653d-49d8-b049-311eb6aba42c
Questions
- Could you please check the possible cause(s) for the 500 error occurring on the tools/list endpoint call?
- Is there anything wrong with the header values or the way the call is made?
- The Notion integration itself has been completed successfully.