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Lifecycle Guide Summary
  • Goal: Master lifecycle management for MCP-enabled applications
  • SDK Version: v2.0.32 or higher
  • Prerequisites: Basic understanding of async/await and decorators
  • Reference: XPander issue #401, SDK v2.0.32

Overview

This guide demonstrates advanced lifecycle management patterns specifically designed for MCP (Model Context Protocol) integrations. You’ll learn how to properly initialize, manage, and cleanup MCP resources using XPander’s lifecycle decorators.

Lifecycle Phases

Boot Phase

Initialize MCP servers, validate configuration, and establish connections

Runtime Phase

Handle tasks with MCP tools, manage connections, and monitor health

Shutdown Phase

Gracefully disconnect from servers, save state, and cleanup resources

Complete Implementation

Virtual Environment Setup

setup.sh
python3 -m venv .venv
source .venv/bin/activate
pip install "xpander-sdk[agno]>=2.0.32"

Environment Configuration

.env
XPANDER_API_KEY=your_api_key
XPANDER_ORGANIZATION_ID=your_org_id
GITHUB_TOKEN=your_github_token
SLACK_BOT_TOKEN=your_slack_token
MCP_CONFIG_PATH=~/.mcp/config.json
advanced_lifecycle_mcp.py
from dotenv import load_dotenv
load_dotenv()

from xpander_sdk import Backend, on_boot, on_shutdown, on_task
from xpander_sdk.tools import MultiMCPTools
from agno.agent import Agent
import asyncio
import logging
import json
import os
from datetime import datetime
from typing import Dict, Any, Optional
import signal

# Configure comprehensive logging
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
)
logger = logging.getLogger(__name__)

# Global state management
class MCPState:
    def __init__(self):
        self.tools: Optional[MultiMCPTools] = None
        self.connected: bool = False
        self.servers: Dict[str, Dict[str, Any]] = {}
        self.metrics: Dict[str, Any] = {
            "boot_time": None,
            "tasks_processed": 0,
            "errors_encountered": 0,
            "reconnections": 0
        }
        self.shutdown_requested: bool = False

# Global state instance
mcp_state = MCPState()

# === BOOT PHASE ===

@on_boot
def setup_signal_handlers():
    """Setup graceful shutdown signal handlers."""
    def signal_handler(signum, frame):
        logger.info(f"📡 Received signal {signum}, initiating graceful shutdown...")
        mcp_state.shutdown_requested = True
    
    signal.signal(signal.SIGINT, signal_handler)
    signal.signal(signal.SIGTERM, signal_handler)
    logger.info("📡 Signal handlers configured")

@on_boot
def validate_mcp_environment():
    """Comprehensive environment validation for MCP integration."""
    logger.info("🔍 Validating MCP environment...")
    
    # Required environment variables
    required_vars = ["XPANDER_API_KEY", "XPANDER_ORGANIZATION_ID"]
    missing_required = [var for var in required_vars if not os.getenv(var)]
    
    if missing_required:
        raise EnvironmentError(f"❌ Missing required variables: {missing_required}")
    
    # Optional but recommended variables
    optional_vars = {
        "GITHUB_TOKEN": "GitHub MCP server functionality will be limited",
        "SLACK_BOT_TOKEN": "Slack MCP server will not be available",
        "MCP_CONFIG_PATH": "Using default MCP configuration path"
    }
    
    for var, warning in optional_vars.items():
        if not os.getenv(var):
            logger.warning(f"⚠️  {var} not set: {warning}")
        else:
            logger.info(f"✅ {var} configured")
    
    # Validate MCP configuration file
    config_path = os.path.expanduser(os.getenv("MCP_CONFIG_PATH", "~/.mcp/config.json"))
    if os.path.exists(config_path):
        try:
            with open(config_path, 'r') as f:
                config = json.load(f)
            logger.info(f"✅ MCP configuration loaded from {config_path}")
        except json.JSONDecodeError as e:
            logger.error(f"❌ Invalid JSON in MCP config: {e}")
            raise
    else:
        logger.info(f"📄 No MCP config file found at {config_path}, using defaults")
    
    logger.info("✅ Environment validation completed")

@on_boot
async def initialize_mcp_tools():
    """Initialize MCP tools with comprehensive server configuration."""
    global mcp_state
    
    logger.info("🔌 Initializing MCP tools and servers...")
    mcp_state.metrics["boot_time"] = datetime.now()
    
    try:
        # Load server configuration
        servers_config = load_server_configuration()
        
        # Initialize MultiMCPTools
        mcp_state.tools = MultiMCPTools(servers=servers_config)
        
        # Connect to all configured servers
        connection_results = await connect_servers_with_retry(servers_config)
        
        # Update state based on connection results
        mcp_state.connected = any(connection_results.values())
        mcp_state.servers = {
            name: {
                "status": "connected" if connected else "failed",
                "last_ping": datetime.now().isoformat() if connected else None,
                "tools_available": 0,
                "reconnection_attempts": 0
            }
            for name, connected in connection_results.items()
        }
        
        # Discover available tools for connected servers
        await discover_server_capabilities()
        
        if mcp_state.connected:
            logger.info(f"✅ MCP initialization complete. Connected to {sum(connection_results.values())}/{len(servers_config)} servers")
        else:
            logger.error("❌ Failed to connect to any MCP servers")
            
    except Exception as e:
        logger.error(f"❌ MCP initialization failed: {e}")
        mcp_state.connected = False
        raise

@on_boot
async def start_background_services():
    """Start background services for health monitoring and maintenance."""
    logger.info("🔄 Starting background services...")
    
    # Start health monitoring
    asyncio.create_task(health_monitoring_service())
    
    # Start metrics collection
    asyncio.create_task(metrics_collection_service())
    
    # Start connection maintenance
    asyncio.create_task(connection_maintenance_service())
    
    logger.info("✅ Background services started")

# === RUNTIME PHASE ===

@on_task
async def handle_mcp_task(task):
    """Advanced task handling with MCP integration."""
    global mcp_state
    
    logger.info(f"📨 Processing MCP task: {task.id}")
    mcp_state.metrics["tasks_processed"] += 1
    
    # Check if MCP is available
    if not mcp_state.connected or not mcp_state.tools:
        mcp_state.metrics["errors_encountered"] += 1
        task.result = {
            "error": "MCP services unavailable",
            "status": "failed",
            "details": "MCP integration is not properly initialized",
            "available_servers": list(mcp_state.servers.keys())
        }
        return task
    
    try:
        # Task analysis and routing
        task_analysis = analyze_task_requirements(task.input.text)
        
        # Route to appropriate MCP server
        result = await route_task_to_server(task_analysis)
        
        # Process result and set task response
        task.result = {
            "status": "completed",
            "server_used": result.get("server_name"),
            "operation": result.get("operation"),
            "data": result.get("data"),
            "processing_time_ms": result.get("processing_time"),
            "timestamp": datetime.now().isoformat()
        }
        
        logger.info(f"✅ Task {task.id} completed successfully")
        
    except Exception as e:
        logger.error(f"❌ Task processing failed: {e}")
        mcp_state.metrics["errors_encountered"] += 1
        
        task.result = {
            "error": str(e),
            "status": "failed",
            "server_status": {name: info["status"] for name, info in mcp_state.servers.items()},
            "timestamp": datetime.now().isoformat()
        }
    
    return task

@on_task
async def handle_health_check(task):
    """Handle health check requests for MCP integration."""
    global mcp_state
    
    if "health" in task.input.text.lower() or "status" in task.input.text.lower():
        health_report = await generate_health_report()
        
        task.result = {
            "health_report": health_report,
            "status": "completed",
            "timestamp": datetime.now().isoformat()
        }
    
    return task

# === SHUTDOWN PHASE ===

@on_shutdown
async def save_mcp_metrics():
    """Save comprehensive MCP metrics before shutdown."""
    global mcp_state
    
    logger.info("📊 Saving MCP metrics and state...")
    
    # Calculate uptime
    if mcp_state.metrics["boot_time"]:
        uptime = datetime.now() - mcp_state.metrics["boot_time"]
        mcp_state.metrics["uptime_seconds"] = uptime.total_seconds()
    
    # Compile final metrics
    final_metrics = {
        "session_metrics": mcp_state.metrics,
        "server_status": mcp_state.servers,
        "final_health_check": await generate_health_report() if mcp_state.connected else None,
        "shutdown_timestamp": datetime.now().isoformat()
    }
    
    # Save to file (in production, send to monitoring system)
    metrics_path = "/tmp/mcp_session_metrics.json"
    try:
        with open(metrics_path, 'w') as f:
            json.dump(final_metrics, f, indent=2, default=str)
        logger.info(f"📈 Metrics saved to {metrics_path}")
    except Exception as e:
        logger.error(f"❌ Failed to save metrics: {e}")

@on_shutdown
async def graceful_mcp_shutdown():
    """Gracefully shutdown all MCP connections."""
    global mcp_state
    
    logger.info("🔌 Shutting down MCP connections...")
    
    if mcp_state.tools:
        try:
            # Disconnect from all servers gracefully
            for server_name in mcp_state.servers:
                if mcp_state.servers[server_name]["status"] == "connected":
                    logger.info(f"🔌 Disconnecting from {server_name}...")
                    await mcp_state.tools.disconnect(server_name)
                    mcp_state.servers[server_name]["status"] = "disconnected"
            
            logger.info("✅ All MCP connections closed gracefully")
            
        except Exception as e:
            logger.error(f"❌ Error during MCP shutdown: {e}")
    
    # Reset state
    mcp_state.connected = False
    mcp_state.tools = None

@on_shutdown
def cleanup_resources():
    """Final cleanup of resources and temporary files."""
    logger.info("🧹 Performing final resource cleanup...")
    
    # Clear sensitive data from memory
    if mcp_state.servers:
        for server_info in mcp_state.servers.values():
            if "auth_token" in server_info:
                server_info["auth_token"] = "[REDACTED]"
    
    # Clean up temporary files
    temp_files = ["/tmp/mcp_temp_*", "/tmp/mcp_cache_*"]
    for pattern in temp_files:
        import glob
        for file_path in glob.glob(pattern):
            try:
                os.remove(file_path)
                logger.info(f"🗑️  Cleaned up {file_path}")
            except Exception as e:
                logger.warning(f"⚠️  Failed to clean {file_path}: {e}")
    
    logger.info("✅ Resource cleanup completed")

# === HELPER FUNCTIONS ===

def load_server_configuration() -> Dict[str, Dict[str, Any]]:
    """Load MCP server configuration from various sources."""
    
    # Default configuration
    default_config = {
        "filesystem": {
            "command": "npx",
            "args": ["@modelcontextprotocol/server-filesystem", "/tmp"],
            "env": {}
        },
        "github": {
            "command": "npx",
            "args": ["@modelcontextprotocol/server-github"],
            "env": {"GITHUB_TOKEN": os.getenv("GITHUB_TOKEN", "")}
        }
    }
    
    # Try to load from config file
    config_path = os.path.expanduser(os.getenv("MCP_CONFIG_PATH", "~/.mcp/config.json"))
    if os.path.exists(config_path):
        try:
            with open(config_path, 'r') as f:
                file_config = json.load(f)
            default_config.update(file_config.get("servers", {}))
        except Exception as e:
            logger.warning(f"⚠️  Failed to load config from {config_path}: {e}")
    
    # Filter out servers with missing required environment variables
    filtered_config = {}
    for name, config in default_config.items():
        if name == "github" and not os.getenv("GITHUB_TOKEN"):
            logger.info(f"⏭️  Skipping {name} server (missing GITHUB_TOKEN)")
            continue
        filtered_config[name] = config
    
    return filtered_config

async def connect_servers_with_retry(servers_config: Dict[str, Dict[str, Any]], max_retries: int = 3) -> Dict[str, bool]:
    """Connect to MCP servers with retry logic."""
    connection_results = {}
    
    for server_name, config in servers_config.items():
        logger.info(f"🔗 Connecting to {server_name}...")
        
        for attempt in range(max_retries):
            try:
                await mcp_state.tools.connect(server_name)
                connection_results[server_name] = True
                logger.info(f"✅ Connected to {server_name}")
                break
                
            except Exception as e:
                logger.warning(f"⚠️  Connection attempt {attempt + 1}/{max_retries} failed for {server_name}: {e}")
                if attempt < max_retries - 1:
                    await asyncio.sleep(2 ** attempt)  # Exponential backoff
                else:
                    connection_results[server_name] = False
                    logger.error(f"❌ Failed to connect to {server_name} after {max_retries} attempts")
    
    return connection_results

async def discover_server_capabilities():
    """Discover and cache capabilities for all connected servers."""
    for server_name, server_info in mcp_state.servers.items():
        if server_info["status"] == "connected":
            try:
                tools = await mcp_state.tools.list_tools(server_name)
                resources = await mcp_state.tools.list_resources(server_name) if hasattr(mcp_state.tools, 'list_resources') else []
                
                server_info["tools_available"] = len(tools)
                server_info["resources_available"] = len(resources)
                server_info["capabilities"] = {
                    "tools": [tool["name"] for tool in tools],
                    "resources": [resource["uri"] for resource in resources] if resources else []
                }
                
                logger.info(f"🔍 Discovered {len(tools)} tools for {server_name}")
                
            except Exception as e:
                logger.warning(f"⚠️  Failed to discover capabilities for {server_name}: {e}")

def analyze_task_requirements(task_text: str) -> Dict[str, Any]:
    """Analyze task to determine required MCP server and operations."""
    analysis = {
        "text": task_text.lower(),
        "required_servers": [],
        "suggested_operations": [],
        "priority": "normal"
    }
    
    # Keyword-based analysis
    if any(keyword in analysis["text"] for keyword in ["file", "directory", "read", "write"]):
        analysis["required_servers"].append("filesystem")
        analysis["suggested_operations"].extend(["read_file", "list_directory", "write_file"])
    
    if any(keyword in analysis["text"] for keyword in ["github", "repository", "repo", "git"]):
        analysis["required_servers"].append("github")
        analysis["suggested_operations"].extend(["search_repositories", "get_file_contents"])
    
    if any(keyword in analysis["text"] for keyword in ["search", "web", "internet"]):
        analysis["required_servers"].append("brave")
        analysis["suggested_operations"].append("web_search")
    
    # Determine priority
    if any(keyword in analysis["text"] for keyword in ["urgent", "asap", "immediately"]):
        analysis["priority"] = "high"
    
    return analysis

async def route_task_to_server(task_analysis: Dict[str, Any]) -> Dict[str, Any]:
    """Route task to appropriate MCP server based on analysis."""
    start_time = datetime.now()
    
    for server_name in task_analysis["required_servers"]:
        if server_name in mcp_state.servers and mcp_state.servers[server_name]["status"] == "connected":
            
            # Get available tools for this server
            available_tools = mcp_state.servers[server_name].get("capabilities", {}).get("tools", [])
            
            # Find matching operations
            matching_ops = [op for op in task_analysis["suggested_operations"] if op in available_tools]
            
            if matching_ops:
                # Execute the first matching operation (simplified routing)
                operation = matching_ops[0]
                
                try:
                    # This would call the actual MCP tool - simplified for example
                    result = await execute_mcp_operation(server_name, operation, task_analysis)
                    
                    processing_time = (datetime.now() - start_time).total_seconds() * 1000
                    
                    return {
                        "server_name": server_name,
                        "operation": operation,
                        "data": result,
                        "processing_time": processing_time
                    }
                    
                except Exception as e:
                    logger.error(f"❌ Operation {operation} failed on {server_name}: {e}")
                    continue
    
    # Fallback: return available capabilities
    return {
        "server_name": "system",
        "operation": "list_capabilities",
        "data": {
            "available_servers": list(mcp_state.servers.keys()),
            "server_status": {name: info["status"] for name, info in mcp_state.servers.items()}
        },
        "processing_time": (datetime.now() - start_time).total_seconds() * 1000
    }

async def execute_mcp_operation(server_name: str, operation: str, task_analysis: Dict[str, Any]) -> Any:
    """Execute specific MCP operation - simplified implementation."""
    
    # This is a simplified implementation - in practice, you'd parse the task
    # and extract proper parameters for each operation
    
    if operation == "read_file":
        # Extract file path from task text
        file_path = "/tmp/example.txt"  # Simplified
        return await mcp_state.tools.call_tool(server_name, operation, {"path": file_path})
    
    elif operation == "search_repositories":
        # Extract search query
        query = "MCP protocol"  # Simplified
        return await mcp_state.tools.call_tool(server_name, operation, {"query": query})
    
    elif operation == "web_search":
        # Extract search terms
        query = task_analysis["text"]
        return await mcp_state.tools.call_tool(server_name, operation, {"query": query})
    
    else:
        return {"message": f"Operation {operation} not implemented"}

async def generate_health_report() -> Dict[str, Any]:
    """Generate comprehensive health report for MCP integration."""
    health_report = {
        "timestamp": datetime.now().isoformat(),
        "overall_status": "healthy" if mcp_state.connected else "unhealthy",
        "uptime": None,
        "servers": {},
        "metrics": mcp_state.metrics.copy()
    }
    
    # Calculate uptime
    if mcp_state.metrics["boot_time"]:
        uptime = datetime.now() - mcp_state.metrics["boot_time"]
        health_report["uptime"] = uptime.total_seconds()
    
    # Server-specific health checks
    for server_name, server_info in mcp_state.servers.items():
        try:
            if server_info["status"] == "connected" and mcp_state.tools:
                # Ping server
                tools = await mcp_state.tools.list_tools(server_name)
                health_report["servers"][server_name] = {
                    "status": "healthy",
                    "tools_count": len(tools),
                    "last_successful_ping": datetime.now().isoformat(),
                    "reconnection_attempts": server_info.get("reconnection_attempts", 0)
                }
            else:
                health_report["servers"][server_name] = {
                    "status": "unhealthy",
                    "reason": "Not connected",
                    "reconnection_attempts": server_info.get("reconnection_attempts", 0)
                }
                
        except Exception as e:
            health_report["servers"][server_name] = {
                "status": "unhealthy",
                "error": str(e),
                "last_error_time": datetime.now().isoformat()
            }
    
    return health_report

# === BACKGROUND SERVICES ===

async def health_monitoring_service():
    """Background service for continuous health monitoring."""
    logger.info("🩺 Health monitoring service started")
    
    while not mcp_state.shutdown_requested:
        try:
            if mcp_state.connected:
                health_report = await generate_health_report()
                
                # Check for unhealthy servers
                unhealthy_servers = [
                    name for name, status in health_report["servers"].items()
                    if status.get("status") != "healthy"
                ]
                
                if unhealthy_servers:
                    logger.warning(f"⚠️  Unhealthy servers detected: {unhealthy_servers}")
                    # Trigger reconnection attempts
                    for server_name in unhealthy_servers:
                        await attempt_server_reconnection(server_name)
                
            await asyncio.sleep(60)  # Check every minute
            
        except Exception as e:
            logger.error(f"❌ Health monitoring error: {e}")
            await asyncio.sleep(60)
    
    logger.info("🩺 Health monitoring service stopped")

async def metrics_collection_service():
    """Background service for metrics collection."""
    logger.info("📊 Metrics collection service started")
    
    while not mcp_state.shutdown_requested:
        try:
            # Update metrics periodically
            mcp_state.metrics["timestamp"] = datetime.now().isoformat()
            
            # Log periodic metrics
            if mcp_state.metrics["tasks_processed"] % 100 == 0 and mcp_state.metrics["tasks_processed"] > 0:
                logger.info(f"📈 Processed {mcp_state.metrics['tasks_processed']} tasks, {mcp_state.metrics['errors_encountered']} errors")
            
            await asyncio.sleep(300)  # Update every 5 minutes
            
        except Exception as e:
            logger.error(f"❌ Metrics collection error: {e}")
            await asyncio.sleep(300)
    
    logger.info("📊 Metrics collection service stopped")

async def connection_maintenance_service():
    """Background service for connection maintenance."""
    logger.info("🔧 Connection maintenance service started")
    
    while not mcp_state.shutdown_requested:
        try:
            # Perform connection maintenance
            if mcp_state.connected:
                for server_name, server_info in mcp_state.servers.items():
                    if server_info["status"] == "connected":
                        # Periodic ping to keep connection alive
                        try:
                            await mcp_state.tools.list_tools(server_name)
                            server_info["last_ping"] = datetime.now().isoformat()
                        except Exception as e:
                            logger.warning(f"⚠️  Connection maintenance failed for {server_name}: {e}")
                            server_info["status"] = "unhealthy"
            
            await asyncio.sleep(600)  # Maintenance every 10 minutes
            
        except Exception as e:
            logger.error(f"❌ Connection maintenance error: {e}")
            await asyncio.sleep(600)
    
    logger.info("🔧 Connection maintenance service stopped")

async def attempt_server_reconnection(server_name: str):
    """Attempt to reconnect to a specific server."""
    server_info = mcp_state.servers.get(server_name)
    if not server_info:
        return
    
    server_info["reconnection_attempts"] = server_info.get("reconnection_attempts", 0) + 1
    mcp_state.metrics["reconnections"] += 1
    
    logger.info(f"🔄 Attempting reconnection to {server_name} (attempt #{server_info['reconnection_attempts']})")
    
    try:
        await mcp_state.tools.reconnect(server_name)
        server_info["status"] = "connected"
        server_info["last_ping"] = datetime.now().isoformat()
        logger.info(f"✅ Successfully reconnected to {server_name}")
        
    except Exception as e:
        logger.error(f"❌ Reconnection failed for {server_name}: {e}")
        server_info["status"] = "failed"

# Initialize backend and agent
backend = Backend()
agno_agent = Agent(**backend.get_args())

# The agent is now ready with advanced MCP lifecycle management
logger.info("🚀 Agent ready with advanced MCP lifecycle management!")
logger.info("📋 Try: 'Check MCP health status'")
logger.info("📋 Try: 'Search for Python examples on GitHub'")
logger.info("📋 Try: 'Read the file /tmp/config.json'")

# Example usage
if __name__ == "__main__":
    try:
        agno_agent.print_response(message="Check MCP health status and show available capabilities")
    except KeyboardInterrupt:
        logger.info("🔄 Graceful shutdown initiated...")

Production Deployment Considerations

Monitoring Integration

# Send metrics to monitoring system
import prometheus_client
from prometheus_client import Counter, Histogram, Gauge

mcp_tasks_total = Counter('mcp_tasks_processed_total')
mcp_errors_total = Counter('mcp_errors_total')
mcp_connection_status = Gauge('mcp_server_connected')

Configuration Management

# Environment-based configuration
class MCPConfig:
    @classmethod
    def from_env(cls):
        return cls(
            servers=json.loads(os.getenv('MCP_SERVERS', '{}')),
            timeouts=int(os.getenv('MCP_TIMEOUT', '30')),
            retry_attempts=int(os.getenv('MCP_RETRY_ATTEMPTS', '3'))
        )

Testing Your Lifecycle Implementation

test_lifecycle.py
import pytest
import asyncio

@pytest.mark.asyncio
async def test_mcp_initialization():
    """Test MCP initialization process."""
    # Simulate initialization
    await initialize_mcp_tools()
    assert mcp_state.connected == True
    assert len(mcp_state.servers) > 0

@pytest.mark.asyncio 
async def test_graceful_shutdown():
    """Test graceful shutdown process."""
    # Setup
    await initialize_mcp_tools()
    
    # Trigger shutdown
    await graceful_mcp_shutdown()
    
    # Verify cleanup
    assert mcp_state.connected == False
    assert mcp_state.tools == None

Key Lifecycle Patterns

  1. Environment Validation First - Always validate before connecting
  2. Graceful Degradation - Continue with partial functionality if some servers fail
  3. Background Services - Start monitoring and maintenance services
  4. Signal Handling - Setup proper signal handlers for graceful shutdown
  1. Health Monitoring - Continuous monitoring of server health
  2. Connection Pooling - Efficient connection management
  3. Circuit Breaking - Fail fast for unhealthy servers
  4. Metrics Collection - Comprehensive operational metrics
  1. Signal Handling - Respond to system shutdown signals
  2. State Preservation - Save important state before shutdown
  3. Connection Cleanup - Gracefully close all connections
  4. Resource Cleanup - Clean up temporary files and sensitive data

Best Practices Summary

  1. Always use lifecycle decorators for proper resource management
  2. Implement comprehensive health checking with automated recovery
  3. Use background services for monitoring and maintenance
  4. Handle errors gracefully with fallback mechanisms
  5. Save operational metrics for monitoring and debugging
  6. Clean up resources thoroughly during shutdown
  7. Use environment-based configuration for flexibility
  8. Implement proper signal handling for graceful shutdowns

Next Steps

  • Production Monitoring: Integrate with your monitoring stack
  • Custom MCP Servers: Build domain-specific MCP servers
  • Load Testing: Test your implementation under load
  • Security Hardening: Implement authentication and authorization

References

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