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OAuth support with external idP #25

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OAuth support with external idP #25

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7e57ded
feat: OAuth support with external idP
cbbayburt Aug 19, 2025
2caa4ba
Enable OAuth scopes with optional 'write'
cbbayburt Sep 5, 2025
f2c92f3
[WIP] Serve from root path '/' for VSCode support
cbbayburt Sep 5, 2025
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23 changes: 23 additions & 0 deletions src/mcp_server_uyuni/auth.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,23 @@
from fastmcp.server.auth import RemoteAuthProvider
from fastmcp.server.auth.providers.jwt import JWTVerifier
from pydantic import AnyHttpUrl


class AuthProvider(RemoteAuthProvider):
def __init__(self, auth_server, write_enabled=False):
required_scopes = ["mcp:read"]
if write_enabled:
required_scopes.append("mcp:write")

verifier = JWTVerifier(
jwks_uri=auth_server + "/protocol/openid-connect/certs",
issuer=auth_server,
audience="mcp-server-uyuni",
required_scopes=required_scopes,
)

super().__init__(
token_verifier=verifier,
authorization_servers=[AnyHttpUrl(auth_server)],
resource_server_url="http://localhost:8000", #TODO: Get URL dynamically?
)
9 changes: 7 additions & 2 deletions src/mcp_server_uyuni/server.py
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,7 @@
from mcp import LoggingLevel, ServerSession, types
from mcp_server_uyuni.logging_config import get_logger, Transport

mcp = FastMCP("mcp-server-uyuni")
from .auth import AuthProvider

class ActivationKeySchema(BaseModel):
activation_key: str
Expand All @@ -51,6 +51,11 @@ class ActivationKeySchema(BaseModel):
UYUNI_MCP_TRANSPORT = os.environ.get('UYUNI_MCP_TRANSPORT', 'stdio')
UYUNI_MCP_LOG_FILE_PATH = os.environ.get('UYUNI_MCP_LOG_FILE_PATH') # Defaults to None if not set

AUTH_SERVER = os.environ.get("UYUNI_AUTH_SERVER")

auth_provider = AuthProvider(AUTH_SERVER, UYUNI_MCP_WRITE_TOOLS_ENABLED) if AUTH_SERVER else None
mcp = FastMCP("mcp-server-uyuni", auth=auth_provider)

logger = get_logger(log_file=UYUNI_MCP_LOG_FILE_PATH, transport=UYUNI_MCP_TRANSPORT)

# Sentinel object to indicate an expected timeout for long-running actions
Expand Down Expand Up @@ -1246,7 +1251,7 @@ def main_cli():
logger.info("Running Uyuni MCP server.")

if UYUNI_MCP_TRANSPORT == Transport.HTTP.value:
mcp.run(transport="streamable-http")
mcp.run(transport="streamable-http", path="/")
elif UYUNI_MCP_TRANSPORT == Transport.STDIO.value:
mcp.run(transport="stdio")
else:
Expand Down