MCP (Model Context Protocol) Implementation

This directory contains a comprehensive implementation of the Model Context Protocol (MCP) for Claude-Flow, providing robust server lifecycle management, tool registration and discovery, protocol version negotiation, security, performance monitoring, and integration with the broader orchestration system.

Overview

The MCP implementation provides:

• Server Lifecycle Management: Start, stop, restart, and health monitoring
• Tool Registry: Registration, discovery, and capability negotiation
• Protocol Management: Version compatibility checking and negotiation
• Security: Authentication, authorization, and session management
• Performance Monitoring: Real-time metrics, alerting, and optimization suggestions
• Orchestration Integration: Seamless integration with Claude-Flow components

Architecture

┌─────────────────────────────────────────────────────────────┐
│                MCP Orchestration Integration                │
├─────────────────────────────────────────────────────────────┤
│  ┌─────────────────┐  ┌─────────────────┐  ┌─────────────────┐ │
│  │ Lifecycle Mgr   │  │ Performance Mon │  │ Protocol Mgr    │ │
│  └─────────────────┘  └─────────────────┘  └─────────────────┘ │
├─────────────────────────────────────────────────────────────┤
│  ┌─────────────────┐  ┌─────────────────┐  ┌─────────────────┐ │
│  │   MCP Server    │  │  Tool Registry  │  │  Auth Manager   │ │
│  └─────────────────┘  └─────────────────┘  └─────────────────┘ │
├─────────────────────────────────────────────────────────────┤
│  ┌─────────────────┐  ┌─────────────────┐  ┌─────────────────┐ │
│  │ Request Router  │  │ Session Manager │  │ Load Balancer   │ │
│  └─────────────────┘  └─────────────────┘  └─────────────────┘ │
├─────────────────────────────────────────────────────────────┤
│  ┌─────────────────┐  ┌─────────────────┐  ┌─────────────────┐ │
│  │ Stdio Transport │  │ HTTP Transport  │  │ WebSocket (TBD) │ │
│  └─────────────────┘  └─────────────────┘  └─────────────────┘ │
└─────────────────────────────────────────────────────────────┘

Core Components

1. MCP Server (server.ts)

The main MCP server implementation providing:

• Protocol-compliant request/response handling
• Tool execution and management
• Session management
• Health status reporting
• Integration with orchestration components

import { MCPServer } from './mcp/server.js';

const server = new MCPServer(config, eventBus, logger);
await server.start();

2. Lifecycle Manager (lifecycle-manager.ts)

Manages server lifecycle with robust error handling:

• State management (stopped, starting, running, stopping, error)
• Health monitoring with configurable intervals
• Auto-restart with exponential backoff
• Graceful shutdown with timeout
• Event emission for state changes

import { MCPLifecycleManager } from './mcp/lifecycle-manager.js';

const lifecycle = new MCPLifecycleManager(config, logger, serverFactory);
await lifecycle.start();

3. Tool Registry (tools.ts)

Enhanced tool registration and discovery:

• Capability-based tool registration
• Tool discovery by category, tags, and permissions
• Metrics tracking (invocations, success rate, execution time)
• Protocol version compatibility checking
• Input validation with JSON Schema

import { ToolRegistry } from './mcp/tools.js';

const registry = new ToolRegistry(logger);
registry.register(tool, capability);
const tools = registry.discoverTools({ category: 'filesystem' });

4. Protocol Manager (protocol-manager.ts)

Handles protocol version negotiation:

• Version compatibility checking
• Capability negotiation
• Feature support detection
• Deprecation warnings
• Migration guidance

import { MCPProtocolManager } from './mcp/protocol-manager.js';

const protocolManager = new MCPProtocolManager(logger);
const result = await protocolManager.negotiateProtocol(clientParams);

5. Authentication Manager (auth.ts)

Comprehensive security implementation:

• Multiple auth methods (token, basic, OAuth)
• Session management with timeouts
• Permission-based authorization
• Rate limiting and brute force protection
• Token refresh and revocation

import { AuthManager } from './mcp/auth.js';

const auth = new AuthManager(authConfig, logger);
const result = await auth.authenticate(request, session, context);

6. Performance Monitor (performance-monitor.ts)

Real-time performance monitoring:

• Request/response time tracking
• Percentile calculations (P50, P95, P99)
• Custom alerting rules
• Optimization suggestions
• Resource usage monitoring

import { MCPPerformanceMonitor } from './mcp/performance-monitor.js';

const monitor = new MCPPerformanceMonitor(logger);
const requestId = monitor.recordRequestStart(request, session);
monitor.recordRequestEnd(requestId, response);

7. Orchestration Integration (orchestration-integration.ts)

Seamless integration with Claude-Flow:

• Component health monitoring
• Tool registration for orchestration features
• Event forwarding and coordination
• Reconnection logic with exponential backoff
• Cross-component communication

import { MCPOrchestrationIntegration } from './mcp/orchestration-integration.js';

const integration = new MCPOrchestrationIntegration(
  mcpConfig,
  orchestrationConfig,
  components,
  logger,
);
await integration.start();

Quick Start

Basic Server Setup

import { MCPIntegrationFactory } from './mcp/index.js';

// Development setup
const { server, lifecycleManager, performanceMonitor } =
  await MCPIntegrationFactory.createDevelopmentSetup(logger);

await lifecycleManager.start();

Full Integration Setup

import { MCPOrchestrationIntegration } from './mcp/orchestration-integration.js';

const integration = new MCPOrchestrationIntegration(
  mcpConfig,
  {
    enabledIntegrations: {
      orchestrator: true,
      swarm: true,
      agents: true,
      resources: true,
      memory: true,
      monitoring: true,
      terminals: true,
    },
    autoStart: true,
    enableMetrics: true,
    enableAlerts: true,
  },
  {
    orchestrator,
    swarmCoordinator,
    agentManager,
    resourceManager,
    memoryManager,
    messageBus,
    monitor,
    eventBus,
    terminalManager,
  },
  logger,
);

await integration.start();

Tool Registration

// Register a simple tool
server.registerTool({
  name: 'filesystem/read',
  description: 'Read file contents',
  inputSchema: {
    type: 'object',
    properties: {
      path: { type: 'string' },
    },
    required: ['path'],
  },
  handler: async (input) => {
    const { path } = input as { path: string };
    return await fs.readFile(path, 'utf-8');
  },
});

// Register with enhanced capabilities
const toolRegistry = new ToolRegistry(logger);
toolRegistry.register(tool, {
  name: 'filesystem/read',
  version: '1.0.0',
  description: 'Read file contents with encoding support',
  category: 'filesystem',
  tags: ['file', 'read', 'io'],
  supportedProtocolVersions: [{ major: 2024, minor: 11, patch: 5 }],
  requiredPermissions: ['filesystem.read'],
});

Configuration

MCP Config

const mcpConfig: MCPConfig = {
  transport: 'http',
  host: '0.0.0.0',
  port: 3000,
  tlsEnabled: true,
  enableMetrics: true,
  auth: {
    enabled: true,
    method: 'token',
    tokens: ['secure-token-here'],
    users: [
      {
        username: 'admin',
        password: 'hashed-password',
        permissions: ['*'],
        roles: ['admin'],
      },
    ],
  },
  loadBalancer: {
    enabled: true,
    maxRequestsPerSecond: 100,
    maxConcurrentRequests: 50,
  },
  sessionTimeout: 3600000, // 1 hour
  maxSessions: 1000,
};

Orchestration Config

const orchestrationConfig: MCPOrchestrationConfig = {
  enabledIntegrations: {
    orchestrator: true,
    swarm: true,
    agents: true,
    resources: true,
    memory: true,
    monitoring: true,
    terminals: true,
  },
  autoStart: true,
  healthCheckInterval: 30000,
  reconnectAttempts: 3,
  reconnectDelay: 5000,
  enableMetrics: true,
  enableAlerts: true,
};

Monitoring and Alerting

Performance Metrics

The performance monitor tracks:

• Request count and success rate
• Response time percentiles (P50, P95, P99)
• Throughput (requests per second)
• Memory and CPU usage
• Error rates by category

Custom Alerts

performanceMonitor.addAlertRule({
  id: 'high_latency',
  name: 'High Response Time',
  metric: 'p95ResponseTime',
  operator: 'gt',
  threshold: 5000, // 5 seconds
  duration: 60000, // 1 minute
  enabled: true,
  severity: 'high',
  actions: ['log', 'notify', 'escalate'],
});

Optimization Suggestions

The system automatically generates optimization suggestions based on:

• Response time patterns
• Memory usage trends
• Throughput bottlenecks
• Error rate analysis

Security Features

Authentication Methods

1. Token Authentication: Static or generated tokens
2. Basic Authentication: Username/password with bcrypt hashing
3. OAuth: JWT token validation (extensible)

Authorization

• Permission-based access control
• Role-based authorization
• Tool-specific permissions
• Session-based authorization

Security Measures

• Rate limiting with exponential backoff
• Brute force protection
• Token expiration and refresh
• Session timeout management
• Input validation and sanitization

Error Handling

Reconnection Logic

• Exponential backoff for failed connections
• Circuit breaker pattern for failing components
• Health check recovery
• Graceful degradation

Error Recovery

• Automatic restart on critical failures
• State preservation during restarts
• Error categorization and handling
• Rollback capabilities

Testing

Comprehensive test suite covering:

• Unit tests for all components
• Integration tests for cross-component interaction
• Performance benchmarks
• Security validation
• Protocol compliance testing

npm test src/mcp/tests/mcp-integration.test.ts

Transport Implementations

Stdio Transport (transports/stdio.ts)

For command-line and process-based communication:

• Standard input/output handling
• Process lifecycle management
• Error stream handling

HTTP Transport (transports/http.ts)

For web-based communication:

• RESTful API endpoints
• WebSocket upgrade support
• CORS handling
• TLS/SSL support

WebSocket Transport (Planned)

For real-time bidirectional communication:

• Connection management
• Message framing
• Reconnection handling

Extension Points

Custom Tools

Implement custom tools by providing:

• Tool definition with schema
• Handler function
• Capability information
• Permission requirements

Custom Transports

Implement the ITransport interface:

• Request/response handling
• Connection management
• Health status reporting

Custom Authentication

Extend the AuthManager class:

• Custom authentication methods
• Integration with external providers
• Custom permission models

Best Practices

Performance

• Use batch operations for multiple requests
• Implement proper caching strategies
• Monitor memory usage and clean up resources
• Use connection pooling for HTTP transport

Security

• Always use HTTPS in production
• Implement proper token rotation
• Use strong password hashing (bcrypt)
• Monitor for suspicious activity

Reliability

• Implement health checks for all components
• Use graceful shutdown procedures
• Monitor system resources
• Implement proper logging and alerting

Scalability

• Use load balancing for high traffic
• Implement horizontal scaling strategies
• Monitor performance metrics
• Use asynchronous operations where possible

Troubleshooting

Common Issues

1. Connection Failures: Check network connectivity and firewall settings
2. Authentication Errors: Verify tokens and credentials
3. Performance Issues: Monitor metrics and check for bottlenecks
4. Memory Leaks: Review resource cleanup and garbage collection

Debug Mode

Enable debug logging:

const logger = createLogger({ level: 'debug' });

Health Checks

Monitor component health:

const health = await server.getHealthStatus();
console.log('Server healthy:', health.healthy);
console.log('Metrics:', health.metrics);

Future Enhancements

• WebSocket transport implementation
• Advanced load balancing algorithms
• Machine learning-based optimization
• Enhanced security features (2FA, SSO)
• Distributed deployment support
• Real-time collaboration features

API Reference

See the individual component files for detailed API documentation:

• Server API
• Lifecycle Manager API
• Tool Registry API
• Protocol Manager API
• Auth Manager API
• Performance Monitor API
• Orchestration Integration API