[Python] How to get the MCPO Proxy command working correctly

Just trying to setup a basic MCP Server and put it behind MCPO proxy.

This MCP server copied from: https://github.com/modelcontextprotocol/python-sdk/tree/main

"""
FastMCP quickstart example.

cd to the `examples/snippets/clients` directory and run:
uv run server fastmcp_quickstart stdio
"""

from mcp.server.fastmcp import FastMCP

# Create an MCP server
mcp = FastMCP("Demo")


# Add an addition tool
@mcp.tool()
def add(a: int, b: int) -> int:
"""Add two numbers"""
return a + b


# Add a dynamic greeting resource
@mcp.resource("greeting://{name}")
def get_greeting(name: str) -> str:
"""Get a personalized greeting"""
return f"Hello, {name}!"


# Add a prompt
@mcp.prompt()
def greet_user(name: str, style: str = "friendly") -> str:
"""Generate a greeting prompt"""
styles = {
"friendly": "Please write a warm, friendly greeting",
"formal": "Please write a formal, professional greeting",
"casual": "Please write a casual, relaxed greeting",
}

return f"{styles.get(style, styles['friendly'])} for someone named {name}."


if __name__ == "__main__":
mcp.run(transport="streamable-http")



I can run the server with: uv run server.py

And in a separate process, I can put it behind an MCPO proxy with:

uvx mcpo --port 8002 --api-key "top-secret" --server-type "streamable-http" -- http://127.0.0.1:8000/mcp

I can then see the add tool under localhost:8002/docs

What I can't get to work is running it in a single command, similarly to the examples in https://github.com/open-webui/mcpo

Neither of these commands work:

uvx mcpo --port 8002 --api-key "top-secret" --server-type "streamable-http" -- http://127.0.0.1:8000/mcp

uvx mcpo --port 8002 --api-key "top-secret" -- uv run server.py

What am I missing to get the MCP Server as Http-streamble with the MCPO Proxy?

What I'm aiming for is to containerise the MCPO + MCP Server along the lines of:

FROM python:3.11-slim
WORKDIR /app
COPY server.py ./
CMD ["uvx", "mcpo", "--host", "0.0.0.0", "--port", "8000", "--", "uvx", "server.py"]

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