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rate-limit-testing

Test API rate limiting and throttling for bypass vulnerabilities.

Updated Feb 23, 2026
Search Tags:#rate limiting#bypass#api security#brute-force#denial-of-service#throttling
One-click install
npx skills add https://github.com/devtint/API_PENTEST --skill rate-limit-testing
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: rate-limit-testing
Source: https://github.com/devtint/API_PENTEST/tree/main/testing/SKILLS/rate-limit-testing
Command: npx skills add https://github.com/devtint/API_PENTEST --skill rate-limit-testing

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill helps identify and exploit weaknesses in API rate limiting and throttling mechanisms, which can prevent brute-force attacks, credential stuffing, and denial-of-service vulnerabilities.

Core Features & Use Cases

  • Rate Limit Discovery: Identifies rate limiting headers and triggers rate limiting to understand thresholds.
  • Bypass Techniques: Explores various methods like IP spoofing, path variations, case sensitivity, and timing attacks to circumvent limits.
  • Use Case: When testing an API login endpoint, you encounter a "429 Too Many Requests" error after a few attempts. This Skill can help you discover if changing the X-Forwarded-For header or using different casing for the username parameter allows you to bypass the limit and continue testing for brute-force vulnerabilities.

Quick Start

Use the rate-limit-testing skill to discover rate limit headers for the target API endpoint.

Frequently Asked Questions about rate-limit-testing

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I bypass API rate limiting when I get a 429 Too Many Requests error?▼

You can test API rate limit bypasses by spoofing IP addresses via X-Forwarded-For headers, modifying path variations, changing parameter casing, or applying timing-based attacks to evade throttling restrictions.

What techniques are used to test API throttling mechanisms for bypass vulnerabilities?▼

Techniques include IP spoofing through X-Forwarded-For headers, path variations, case sensitivity modifications, and timing-based attacks to identify and exploit weaknesses in API throttling mechanisms.

Can I test for brute-force vulnerabilities on an API endpoint that has rate limiting enabled?▼

Yes, you can test brute-force vulnerabilities by identifying rate limit thresholds and applying bypass techniques like IP spoofing or case variations to continue sending concurrent requests beyond API limits.

How do I identify rate limit headers on a target API endpoint?▼

Identify rate limit headers by sending requests to the target API endpoint and analyzing the HTTP responses to discover throttling thresholds and active rate limiting mechanisms.

Do I need to send concurrent requests to test API rate limiting bypass mechanisms?▼

Yes, testing API rate limiting bypass mechanisms requires an accessible API endpoint and the ability to send concurrent requests to trigger and analyze throttling behaviors effectively.

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