---
title: ToolRouter — Use Case
description: Step-by-step guide for a real-world ToolRouter use case with agent-specific instructions.
url: https://toolrouter.com/tools/pentest/use-cases/test-api-security
---
# Test API Security

APIs are the backbone of modern applications, but they are also prime targets for attackers. Unlike web interfaces with built-in browser protections, APIs expose raw endpoints that can be probed directly with custom requests. Broken authentication, missing rate limits, excessive data exposure, and injection vulnerabilities are rampant in APIs that were never security tested.

API security testing goes beyond traditional web scanning. It involves testing authentication flows, checking authorization boundaries, probing input validation, and attempting injection attacks against every endpoint. The pentest tool tests your API endpoints systematically, checking for OWASP API Security Top 10 vulnerabilities.

Every API that handles user data, processes payments, or controls access to resources needs security testing. This is especially critical for public APIs, third-party integrations, and any endpoint that accepts user input. Finding an API vulnerability before launch is a minor inconvenience. Finding it after a data breach is a business-ending event.

**Tool:** [Pentest](https://toolrouter.com/tools/pentest)
**Skills:** scan_vulnerabilities, test_injection

## Agent Guides

- [How to Test API Security with Claude](https://toolrouter.com/tools/pentest/use-cases/test-api-security/claude): Guide for Claude
- [How to Test API Security with ChatGPT](https://toolrouter.com/tools/pentest/use-cases/test-api-security/chatgpt): Guide for ChatGPT
- [How to Test API Security with Copilot](https://toolrouter.com/tools/pentest/use-cases/test-api-security/copilot): Guide for Copilot
- [How to Test API Security with OpenClaw](https://toolrouter.com/tools/pentest/use-cases/test-api-security/openclaw): Guide for OpenClaw
