I've successfully created a comprehensive XSS (Cross-Site Scripting) vulnerability testing agent that combines AI-powered analysis with automated payload generation. The system provides an intelligent, user-friendly interface for security professionals to test web applications for XSS vulnerabilities.

• Modern UI: Clean, responsive interface built with React 18.2.0
• Real-time Results: Live updates during testing with loading states
• Tabbed Interface: Organized results display (Overview, Vulnerabilities, AI Analysis)
• Demo Mode: Fully functional demo without requiring API keys

• RESTful API: Clean API endpoints for testing and data retrieval
• Service Integration: Seamless integration with Novita AI and MCP services
• Error Handling: Comprehensive error handling with fallback mechanisms
• Rate Limiting: Built-in protection against abuse

• Intelligent Analysis: Uses GPT-OSS-20B for security analysis
• Context-Aware: Generates testing strategies based on target analysis
• Risk Assessment: Provides confidence scores and risk ratings
• Actionable Recommendations: Specific remediation guidance

• Dynamic Payloads: Real-time XSS payload generation
• Contextual Selection: Payloads tailored to target characteristics
• Fallback System: Built-in payloads when service is unavailable
• API Authentication: Secure integration with API key authentication

• Supports reflected, stored, and DOM-based XSS
• AI-powered testing strategy generation
• Multiple injection point testing (query params, form data, headers)
• Evidence collection and vulnerability confirmation

• Detailed vulnerability reports with severity classification
• AI-generated security analysis and recommendations
• Performance metrics and testing statistics
• Export-ready results format

• Intuitive web interface with guided workflow
• Real-time progress indicators and status updates
• Service health monitoring and status display
• Demo mode for immediate testing without setup

• Built-in ethical usage guidelines and warnings
• Rate limiting to prevent server overload
• Comprehensive logging for audit trails
• Responsible disclosure recommendations

├── README.md                 # Project overview and features
├── SETUP.md                 # Detailed setup and configuration guide
├── PROJECT_SUMMARY.md       # This summary document
├── backend/
│   ├── index.ts            # Main Hono server with HTTP trigger
│   ├── routes/
│   │   └── xss.ts          # XSS testing endpoints and logic
│   └── services/
│       ├── novita.ts       # Novita AI integration
│       └── mcp.ts          # MCP service integration
├── frontend/
│   └── index.html          # React SPA with complete UI
└── shared/
    └── types.ts            # TypeScript type definitions

• POST /api/xss/test - Perform XSS vulnerability testing
• POST /api/xss/demo - Demo mode with mock results
• GET /api/xss/payloads - Retrieve available XSS payloads
• GET /api/xss/health - Service health check

• GET / - Main application interface
• GET /frontend/* - Frontend assets
• GET /shared/* - Shared utilities

• Runtime: Deno (Val Town platform)
• Backend Framework: Hono 3.11.7
• Frontend: React 18.2.0 with TypeScript
• Styling: TailwindCSS via Twind
• AI Service: Novita AI (GPT-OSS-20B model)
• Payload Service: MCP hosted service

• File Utilities: readFile, serveFile for asset serving
• HTTP Triggers: Automatic HTTPS endpoints
• Environment Variables: Secure API key management
• Error Handling: Built-in error catching and reporting

• Clear warnings about authorized testing only
• Responsible disclosure guidelines
• Rate limiting and abuse prevention
• Comprehensive audit logging

• Input validation and sanitization
• Secure API key handling via environment variables
• Error handling that doesn't expose sensitive information
• CORS configuration for cross-origin requests

The application includes a fully functional demo mode that showcases all features without requiring API keys:

1. Visit the application URL
2. Click "🎯 Try Demo (No API Keys Required)"
3. Explore the complete interface with realistic mock data

With proper API keys configured:

1. Set NOVITA_API_KEY and MCP_API_KEY environment variables
2. Enter a target URL (only test sites you own or have permission to test)
3. Select test depth and start the scan
4. Review comprehensive results and AI analysis

The system provides detailed vulnerability reports including:

• Vulnerability Details: Payload, location, method, parameters
• Evidence Collection: Proof of successful exploitation
• Severity Classification: Critical, High, Medium, Low risk levels
• AI Analysis: Comprehensive security assessment
• Remediation Guidance: Specific, actionable recommendations

Potential improvements and extensions:

1. Advanced Payloads: WAF bypass techniques, encoding variations
2. Reporting Formats: PDF export, integration with security tools
3. Batch Testing: Multiple URL testing with comparison reports
4. Custom Rules: User-defined testing patterns and payloads
5. Integration APIs: Webhook notifications, CI/CD pipeline integration

The XSS Testing Agent successfully combines cutting-edge AI technology with practical security testing needs. It provides security professionals with a powerful, intelligent tool for identifying and analyzing XSS vulnerabilities while maintaining ethical standards and user-friendly operation.

The system is production-ready and can be immediately deployed for authorized security testing activities. The demo mode allows for immediate evaluation of capabilities, while the full system provides comprehensive XSS testing with AI-powered insights.

Ready to use: The application is fully functional and can be accessed immediately through the Val Town platform with the demo mode, or with full capabilities once API keys are configured.