Performing API Rate Limiting Bypass

When to Use

• Testing whether API rate limiting can be circumvented to enable brute force attacks on authentication endpoints
• Assessing the effectiveness of API throttling controls against credential stuffing or account enumeration
• Evaluating if rate limits are enforced consistently across all API versions, methods, and encoding formats
• Testing if API gateway rate limiting can be bypassed through header manipulation or IP rotation
• Validating that rate limits protect against resource exhaustion and denial-of-service conditions

Do not use without written authorization. Rate limit testing involves sending high volumes of requests that may impact service availability.

Prerequisites

• Written authorization specifying target endpoints and acceptable request volumes
• Python 3.10+ with requests, aiohttp, and asyncio libraries
• Burp Suite Professional with Turbo Intruder extension for high-speed testing
• cURL for manual header manipulation testing
• Knowledge of the target's CDN and WAF infrastructure (Cloudflare, AWS WAF, Akamai)
• List of rate-limit bypass headers to test