MCP Gateway - Unable to list the tools

[arham-jain12]

I can list tools inside the gateway itself, but I am NOT able to list tools from the remote servers (namespaced tools) through the gateway. Below I am providing both client and server side code.

#Server Side Code

from fastapi import FastAPI
from fastmcp import FastMCP
from fastmcp.server import create_proxy
from fastmcp.client.transports import StreamableHttpTransport
from fastmcp.server.transforms.namespace import Namespace
from fastmcp.client import Client

mcp = FastMCP(name="mcp-gateway")
@mcp.tool()
def gateway_info() -> str:
    return "gateway alive"

github_token = os.getenv("GITHUB_TOKEN")
if not github_token:
    raise RuntimeError("GITHUB_TOKEN is not set")

external_token = TOKEN
if not external_token:
    raise RuntimeError("TOKEN is not set")

github_client = Client(
    transport=StreamableHttpTransport(
        url="https://api.githubcopilot.com/mcp/",
        headers={
            "Authorization": f"Bearer {github_token}",
            "Accept": "application/json, text/event-stream",
        },
    )
)
github_proxy = FastMCP.as_proxy(github_client)
github_proxy.add_transform(Namespace("github"))
mcp.add_provider(github_proxy._local_provider)

external_client = Client(
    transport=StreamableHttpTransport(
        url="https://apps.us-west-2.cloud.singlestore.com/functions/ce89c5b8-16e8-45c1-ba2e-70581d5387bb/mcp",
        headers={
            "Authorization": f"Bearer {external_token}",
            "Accept": "application/json, text/event-stream",
        },
    )
)
external_proxy = FastMCP.as_proxy(external_client)
external_proxy.add_transform(Namespace("external"))
mcp.add_provider(external_proxy._local_provider)

#Client Side Code

async def main():
    client = Client(
        transport=StreamableHttpTransport(
            url=MCP_URL,
            headers={
                "Authorization": f"Bearer {TOKEN}",
                "Accept": "application/json, text/event-stream",
            },
        )
    )
    async with client:
        tools = await client.list_tools()
        print("Tools discovered:", [t.name for t in tools])