Api Security Testing

This is a structured seven-phase workflow for testing API security, covering both REST and GraphQL endpoints. It walks you through discovery, authentication and authorization testing, input validation, rate limiting checks, GraphQL-specific vulnerabilities, and error handling. Each phase references other granular skills like api-fuzzing-bug-bounty and broken-authentication with copy-paste prompts to chain them together. The checklist format is helpful if you're doing bug bounty work or security audits and want to make sure you're not missing obvious attack vectors. It's essentially a methodology guide that assumes you already have the underlying testing skills installed.

skills.sh installs: 701
GitHub stars: 43.1K
last updated: Jul 14, 2026

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Install

$ npx -y skills add sickn33/antigravity-awesome-skills --skill api-security-testing --agent claude-code

Installs into .claude/skills of the current project.

Files

⚠️ AUTHORIZED USE ONLY This skill is for educational purposes or authorized security assessments only. You must have explicit, written permission from the system owner before using this tool. Misuse of this tool is illegal and strictly prohibited.

Mandatory confirmation gate Before running any command that probes, exploits, changes, persists on, extracts data from, or attempts credential access against a target:

Ask the user to state the exact target URL, IP, account, or resource.

Ask the user to confirm written authorization and the permitted scope.

Show the exact command(s) and explain their expected effect.

Wait for explicit confirmation in the current conversation.

Without that confirmation, remain read-only and provide defensive guidance only. Prefer a sandbox, disposable VM, or controlled lab.

API Security Testing Workflow

Overview

Specialized workflow for testing REST and GraphQL API security including authentication, authorization, rate limiting, input validation, and API-specific vulnerabilities.