Adaptive Rate Limiting for API Abuse Prevention

[Ayaanshaikh12243]

Pull Request: Adaptive Rate Limiting for API Abuse Prevention

Issue Reference

Closes #995

Summary

This PR introduces an adaptive rate limiting system that uses real-time analytics and machine learning to dynamically adjust API quotas based on user behavior and risk profiles. This approach helps prevent service outages and security incidents caused by evolving API abuse patterns.

Features

• Real-time analytics for API usage
• ML-based risk scoring
• Dynamic quota adjustment per user
• Logging and monitoring for compliance
• Easy integration with Express API routes
• Dashboard, admin, and reporting utilities

Implementation Details

• New adaptive/ directory with modular files:
  • analytics.js, ml-risk.js, ml-models.js, quota.js, logger.js, rate-limiter.js, api.js, dashboard.js, admin.js, monitor.js, alerts.js, stats.js, report.js, config.js, types.d.ts, examples.js, README.md, README_API.md, docs.md
• Over 500 lines of code across all modules
• All rate limiting events logged for audit and compliance

Testing

• Includes test.js for basic test scenarios
• Run dashboard.js to view live stats
• Alerts and monitoring via monitor.js and alerts.js

Documentation

• Usage and integration instructions in README.md, README_API.md, and docs.md

Reviewer Notes

• Please review ML risk logic and quota adjustment
• Suggestions for further ML enhancements or external integrations are welcome

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[github-actions]

🎉 Thanks for the PR, @Ayaanshaikh12243!

We really appreciate you taking the time to contribute to ExpenseFlow! 💙

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✅ PR Checklist

Before we review, please ensure:

• Your code follows the project's coding standards
• All file changes are accurate and intentional
• You've tested your changes locally
• Any review comments have been addressed

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• Please make sure your code follows the project structure
• Add clear commit messages and comments where necessary
• Ensure your changes do not break existing functionality

We'll review your PR as soon as possible. Keep up the great work! ✨

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