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feat: implement SEP-991 URL-based client ID (CIMD) support (#1652)

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Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Felix Weinberger <3823880+felixweinberger@users.noreply.github.com>
This commit is contained in:
Paul Carleton 2025-11-24 17:21:03 +00:00 • committed by GitHub
commit f22501315e
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1 changed files with 476 additions and 14 deletions
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15
examples/clients/simple-auth-client/mcp_simple_auth_client/main.py
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@ -150,9 +150,15 @@ class CallbackServer:
class SimpleAuthClient:
"""Simple MCP client with auth support."""
def __init__(self, server_url: str, transport_type: str = "streamable-http"):
def __init__(
self,
server_url: str,
transport_type: str = "streamable-http",
client_metadata_url: str | None = None,
):
self.server_url = server_url
self.transport_type = transport_type
self.client_metadata_url = client_metadata_url
self.session: ClientSession | None = None
async def connect(self):
@ -185,12 +191,14 @@ class SimpleAuthClient:
webbrowser.open(authorization_url)
# Create OAuth authentication handler using the new interface
# Use client_metadata_url to enable CIMD when the server supports it
oauth_auth = OAuthClientProvider(
server_url=self.server_url,
client_metadata=OAuthClientMetadata.model_validate(client_metadata_dict),
storage=InMemoryTokenStorage(),
redirect_handler=_default_redirect_handler,
callback_handler=callback_handler,
client_metadata_url=self.client_metadata_url,
)
# Create transport with auth handler based on transport type
@ -334,6 +342,7 @@ async def main():
# Most MCP streamable HTTP servers use /mcp as the endpoint
server_url = os.getenv("MCP_SERVER_PORT", 8000)
transport_type = os.getenv("MCP_TRANSPORT_TYPE", "streamable-http")
client_metadata_url = os.getenv("MCP_CLIENT_METADATA_URL")
server_url = (
f"http://localhost:{server_url}/mcp"
if transport_type == "streamable-http"
@ -343,9 +352,11 @@ async def main():
print("🚀 Simple MCP Auth Client")
print(f"Connecting to: {server_url}")
print(f"Transport type: {transport_type}")
if client_metadata_url:
print(f"Client metadata URL: {client_metadata_url}")
# Start connection flow - OAuth will be handled automatically
client = SimpleAuthClient(server_url, transport_type)
client = SimpleAuthClient(server_url, transport_type, client_metadata_url)
await client.connect()