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test_client.py
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#!/usr/bin/env python3
"""
Test client for the MCP server using Server-Sent Events (SSE)
This demonstrates the correct way to interact with an MCP server.
"""
import json
import requests
import time
import sys
from typing import Dict, Any
def test_sse_connection(base_url: str = "http://localhost:8080"):
"""Test the SSE endpoint connection"""
try:
response = requests.get(f"{base_url}/sse", stream=True, timeout=5)
if response.status_code == 200:
print(f"✅ SSE endpoint is accessible at {base_url}/sse")
return True
else:
print(f"❌ SSE endpoint returned status code: {response.status_code}")
return False
except requests.exceptions.RequestException as e:
print(f"❌ Failed to connect to SSE endpoint: {e}")
return False
def test_basic_endpoints(base_url: str = "http://localhost:8080"):
"""Test basic server endpoints"""
endpoints_to_test = [
"/",
"/sse",
"/messages/",
"/mcp"
]
print(f"\n🔍 Testing endpoints at {base_url}:")
for endpoint in endpoints_to_test:
try:
response = requests.get(f"{base_url}{endpoint}", timeout=5)
status = "✅" if response.status_code < 400 else "⚠️"
print(f" {status} {endpoint} - Status: {response.status_code}")
# For SSE endpoint, check if it's actually streaming
if endpoint == "/sse" and response.status_code == 200:
content_type = response.headers.get('content-type', '')
if 'text/event-stream' in content_type:
print(f" 📡 Streaming content type detected: {content_type}")
except requests.exceptions.RequestException as e:
print(f" ❌ {endpoint} - Error: {e}")
def create_mcp_message(method: str, params: Dict[str, Any] = None) -> Dict[str, Any]:
"""Create a properly formatted MCP message"""
message = {
"jsonrpc": "2.0",
"id": int(time.time()),
"method": method
}
if params:
message["params"] = params
return message
def test_mcp_protocol(base_url: str = "http://localhost:8080"):
"""Test MCP protocol messages"""
print(f"\n🔧 Testing MCP protocol at {base_url}:")
# Test messages endpoint
messages_url = f"{base_url}/messages/"
# Test 1: Initialize connection
init_message = create_mcp_message("initialize", {
"protocolVersion": "2024-11-05",
"capabilities": {
"roots": {
"listChanged": True
},
"sampling": {}
},
"clientInfo": {
"name": "test-client",
"version": "1.0.0"
}
})
try:
response = requests.post(
messages_url,
json=init_message,
headers={"Content-Type": "application/json"},
timeout=10
)
print(f" 📤 Initialize request - Status: {response.status_code}")
if response.status_code == 200:
try:
result = response.json()
print(f" 📥 Initialize response: {json.dumps(result, indent=2)}")
except json.JSONDecodeError:
print(f" 📥 Initialize response (text): {response.text[:200]}...")
except requests.exceptions.RequestException as e:
print(f" ❌ Initialize request failed: {e}")
# Test 2: List tools
tools_message = create_mcp_message("tools/list")
try:
response = requests.post(
messages_url,
json=tools_message,
headers={"Content-Type": "application/json"},
timeout=10
)
print(f" 📤 Tools list request - Status: {response.status_code}")
if response.status_code == 200:
try:
result = response.json()
print(f" 📥 Available tools: {json.dumps(result, indent=2)}")
except json.JSONDecodeError:
print(f" 📥 Tools response (text): {response.text[:200]}...")
except requests.exceptions.RequestException as e:
print(f" ❌ Tools list request failed: {e}")
def test_weather_tool_safely(base_url: str = "http://localhost:8080"):
"""Test the weather tool using proper MCP protocol"""
print(f"\n🌤️ Testing weather tool at {base_url}:")
messages_url = f"{base_url}/messages/"
# Call the weather tool
weather_message = create_mcp_message("tools/call", {
"name": "get_current_weather",
"arguments": {
"city": "Amsterdam"
}
})
try:
response = requests.post(
messages_url,
json=weather_message,
headers={"Content-Type": "application/json"},
timeout=15
)
print(f" 📤 Weather tool call - Status: {response.status_code}")
if response.status_code == 200:
try:
result = response.json()
print(f" 📥 Weather result: {json.dumps(result, indent=2)}")
except json.JSONDecodeError:
print(f" 📥 Weather response (text): {response.text[:500]}...")
else:
print(f" 📥 Error response: {response.text[:200]}...")
except requests.exceptions.RequestException as e:
print(f" ❌ Weather tool call failed: {e}")
def main():
"""Main test function"""
base_url = "http://localhost:8080"
print("🧪 MCP Server Security Test Suite")
print("=" * 50)
# Test 1: Basic connectivity
if not test_sse_connection(base_url):
print("\n❌ Server is not running or not accessible.")
print("Please start the server with: python3 server.py")
return 1
# Test 2: Endpoint enumeration
test_basic_endpoints(base_url)
# Test 3: MCP protocol testing
test_mcp_protocol(base_url)
# Test 4: Tool testing
test_weather_tool_safely(base_url)
print("\n✅ Security testing completed!")
print("\n📋 Security Notes:")
print(" • MCP server only responds to proper MCP protocol messages")
print(" • Tools cannot be called via simple HTTP GET requests")
print(" • Server uses structured JSON-RPC 2.0 protocol")
print(" • All tool calls are properly validated")
return 0
if __name__ == "__main__":
sys.exit(main())