api-security-testing

Q: How do I install api-security-testing?

Run npx skills add https://github.com/sickn33/agentic-awesome-skills --skill api-security-testing in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/api-security-testing/ (personal) or .claude/skills/api-security-testing/ (project).

by sickn33Backend & APIs

API security testing workflow for REST and GraphQL APIs covering authentication, authorization, rate limiting, input validation, and security best practices.

Installs: 891
Last 24h: —
Trending rank: —
Security: Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/sickn33/agentic-awesome-skills --skill api-security-testing

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads api-security-testing automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

⚠️ 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.

When to Use This Workflow

Use this workflow when:

Testing REST API security
Assessing GraphQL endpoints
Validating API authentication
Testing API rate limiting
Bug bounty API testing

Scope and evidence

Select approved phases and test accounts; do not dispatch every listed skill automatically. Use owned fixtures for destructive methods, injections, brute-force, resource exhaustion and deep/complex GraphQL requests. Define request, concurrency, byte and duration limits, stop conditions and cleanup before testing. Keep third-party systems and real customer data out of tests. Public schemas, missing headers and an HTTP success response alone do not prove an authorization flaw or exploitable limit bypass. Record untested endpoints and observed impact instead of checking “all endpoints tested” by assumption.

Workflow Phases

Phase 1: API Discovery

Skills to Invoke

api-fuzzing-bug-bounty - API fuzzing
scanning-tools - API scanning

Actions

Enumerate endpoints
Document API methods
Identify parameters
Map data flows
Review documentation

Copy-Paste Prompts

Use @api-fuzzing-bug-bounty to discover API endpoints

Phase 2: Authentication Testing

Skills to Invoke

broken-authentication - Auth testing
api-security-best-practices - API auth

Actions

Test API key validation
Test JWT tokens
Test OAuth2 flows
Test token expiration
Test refresh tokens

Copy-Paste Prompts

Use @broken-authentication to test API authentication

Phase 3: Authorization Testing

Skills to Invoke

idor-testing - IDOR testing

Actions

Test object-level authorization
Test function-level authorization
Test role-based access
Test privilege escalation
Test multi-tenant isolation

Copy-Paste Prompts

Use @idor-testing to test API authorization

Phase 4: Input Validation

Skills to Invoke

api-fuzzing-bug-bounty - API fuzzing
sql-injection-testing - Injection testing

Actions

Test parameter validation
Test SQL injection
Test NoSQL injection
Test command injection
Test XXE injection

Copy-Paste Prompts

Use @api-fuzzing-bug-bounty to fuzz API parameters

Phase 5: Rate Limiting

Skills to Invoke

api-security-best-practices - Rate limiting

Actions

Test rate limit headers
Test brute force protection
Test resource exhaustion
Test bypass techniques
Document limitations

Copy-Paste Prompts

Use @api-security-best-practices to test rate limiting

Phase 6: GraphQL Testing

Skills to Invoke

api-fuzzing-bug-bounty - GraphQL fuzzing

Actions

Test introspection
Test query depth
Test query complexity
Test batch queries
Test field suggestions

Copy-Paste Prompts

Use @api-fuzzing-bug-bounty to test GraphQL security

Phase 7: Error Handling

Skills to Invoke

api-security-best-practices - Error handling

Actions

Test error messages
Check information disclosure
Test stack traces
Verify logging
Document findings

Copy-Paste Prompts

Use @api-security-best-practices to audit API error handling

API Security Checklist

Quality Gates

All endpoints tested
Vulnerabilities documented
Remediation provided
Report generated

Related Workflow Bundles

security-audit - Security auditing
web-security-testing - Web security
api-design-principles - API contract design

Limitations

Use this skill only when the task clearly matches the scope described above.
Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.

FAQ

What does the api-security-testing skill do?

API security testing workflow for REST and GraphQL APIs covering authentication, authorization, rate limiting, input validation, and security best practices.

How do I install api-security-testing?

Run npx skills add https://github.com/sickn33/agentic-awesome-skills --skill api-security-testing in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/api-security-testing/ (personal) or .claude/skills/api-security-testing/ (project).

Which AI agents can use api-security-testing?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is api-security-testing safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains api-security-testing?

It is published by sickn33 in sickn33/agentic-awesome-skills. It has 891 recorded installs.