# AI API Rate Limiting, Auth and Abuse Testing

> Master the infrastructure security of LLM APIs. Learn to exploit and defend against token exhaustion, API key leakage, and automated abuse in agentic workflows.

Canonical: https://codelivly.com/rooms/ai-api-rate-limiting-auth-abuse-testing
Last updated: 2026-10-12

| | |
|---|---|
| Level | Intermediate |
| Category | Cybersecurity |
| Lessons | 3 |
| Estimated time | 30 min |
| XP | 100 |

This module explores the operational vulnerabilities of AI APIs and function-calling endpoints. You will learn how attackers exploit weak rate limiting to cause token exhaustion and Denial of Wallet (DoW), bypass authentication mechanisms, and automate abuse at scale. You will also learn how to implement robust infrastructure defenses like token quotas, strict API key management, and behavioral anomaly detection to protect AI applications from resource depletion and unauthorized access.

## Lessons

1. What Makes AI API Abuse Different from Normal API Abuse (30 min)
2. Testing Rate Limits and Cost-Based Denial of Service (30 min)
3. Testing Authentication and Authorization on AI Endpoints (30 min)

## Related

- [Learning path: AI API and Function-Calling Attacks](https://codelivly.com/learning-paths/ai-api-and-function-calling-attacks)
- [All rooms](https://codelivly.com/rooms)