Add SSE support

agent.py

@@ -1,6 +1,7 @@
 # ruff: noqa: INP001
 """ADK agent that connects to the knowledge-search MCP server."""
 
+import argparse
 import asyncio
 import os
 
@@ -8,7 +9,10 @@ from google.adk.agents.llm_agent import LlmAgent
 from google.adk.runners import Runner
 from google.adk.sessions import InMemorySessionService
 from google.adk.tools.mcp_tool import McpToolset
-from google.adk.tools.mcp_tool.mcp_session_manager import StdioConnectionParams
+from google.adk.tools.mcp_tool.mcp_session_manager import (
+    SseConnectionParams,
+    StdioConnectionParams,
+)
 from google.genai import types
 from mcp import StdioServerParameters
 
@@ -22,15 +26,32 @@ if location := os.environ.get("LOCATION"):
 SERVER_SCRIPT = os.path.join(os.path.dirname(os.path.abspath(__file__)), "main.py")
 
 
+def _parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(description="Knowledge Search Agent")
+    parser.add_argument(
+        "--remote",
+        metavar="URL",
+        help="Connect to an already-running MCP server at this SSE URL "
+        "(e.g. http://localhost:8080/sse). Without this flag the agent "
+        "spawns the server as a subprocess.",
+    )
+    return parser.parse_args()
+
+
 async def async_main() -> None:
-    toolset = McpToolset(
-        connection_params=StdioConnectionParams(
+    args = _parse_args()
+
+    if args.remote:
+        connection_params = SseConnectionParams(url=args.remote)
+    else:
+        connection_params = StdioConnectionParams(
             server_params=StdioServerParameters(
                 command="uv",
                 args=["run", "python", SERVER_SCRIPT],
             ),
-        ),
-    )
+        )
+
+    toolset = McpToolset(connection_params=connection_params)
 
     agent = LlmAgent(
         model="gemini-2.0-flash",