Error in sse_reader for MCP

[amd-srijaroy]

What happened?

Describe the bug Error in sse_reader: Expected response header Content-Type to contain 'text/event-stream', got 'text/html'

To Reproduce

from autogen_ext.tools.mcp import SseMcpToolAdapter, SseServerParams, mcp_server_tools
from autogen_agentchat.agents import AssistantAgent


# Create server params for the remote MCP service
server_params = SseServerParams(
    url="http://127.0.0.1:6274/",
    headers={"Authorization": "Bearer your-api-key"},
    timeout=30,  # Connection timeout in seconds
)

tools = await mcp_server_tools(server_params)

or

adapter = await SseMcpToolAdapter.from_server_params(server_params, "WikipediaAssistant")

Error: Error in sse_reader: Expected response header Content-Type to contain 'text/event-stream', got 'text/html'

But when I use the below (StdioServerParams), it works [both in local]

from autogen_agentchat.agents import AssistantAgent
from autogen_ext.tools.mcp import StdioServerParams, mcp_server_tools

# Get the fetch tool from mcp-server-fetch.
fetch_mcp_server = StdioServerParams(command="uvx", args=["mcp-server-fetch"])
tools = await mcp_server_tools(fetch_mcp_server)

Which packages was the bug in?

Python Extensions (autogen-ext)

AutoGen library version.

Python 0.5.4

Other library version.

No response

Model used

No response

Model provider

Azure OpenAI

Other model provider

No response

Python version

3.12

.NET version

None

Operating system

Ubuntu