Propagate oauth flow with proxy

[JeremyCraigMartinez]

Context:

Creating a proxy server with internal org-wide semantic overlay / business logic on remote Atlassian MCP server (which we do not control). I intend to host this proxy server remotely

Code example

import os
from fastmcp import FastMCP, Client
from fastmcp.client.transports import SSETransport

atlassian_host = os.getenv("ATLASSIAN_HOST", "https://mcp.atlassian.com/v1/sse")
backend_client = Client(SSETransport(url=atlassian_host))

# Create the proxy server
mcp = FastMCP.as_proxy(
    backend_client,
    name="JiraServer"
)

Issue

How can I ensure that when a client (like mcp-remote) attempts to establish a connection with the proxy server, that it will kick over to the browser for the oauth flow? If I were to connect mcp-remote directly to https://mcp.atlassian.com/v1/sse, it behaves fine. However, my proxy server does not propagate this behavior.