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api-security-testing

Assess REST and GraphQL API security through checks of authentication, access permissions, input validation, and request limits. The workflow guides endpoint discovery, testing, and documentation of findings and remediation within an authorized scope.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

원문원문 설명 보기

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

설치 방법 보기

이럴 때 유용합니다

  • Checking API authentication and token handling
  • Testing access permissions across roles and tenants
  • Reviewing request limits and input validation
  • Assessing GraphQL query depth and complexity

포함된 파일(1)

  • SKILL.md5.3 KB

SKILL.md(원문)

설치하기 전에 에이전트에게 전달되는 지시 내용을 확인할 수 있습니다.

⚠️ 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:

  1. Ask the user to state the exact target URL, IP, account, or resource.
  2. Ask the user to confirm written authorization and the permitted scope.
  3. Show the exact command(s) and explain their expected effect.
  4. 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

  1. Enumerate endpoints
  2. Document API methods
  3. Identify parameters
  4. Map data flows
  5. 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

  1. Test API key validation
  2. Test JWT tokens
  3. Test OAuth2 flows
  4. Test token expiration
  5. 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

  1. Test object-level authorization
  2. Test function-level authorization
  3. Test role-based access
  4. Test privilege escalation
  5. 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

  1. Test parameter validation
  2. Test SQL injection
  3. Test NoSQL injection
  4. Test command injection
  5. 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

  1. Test rate limit headers
  2. Test brute force protection
  3. Test resource exhaustion
  4. Test bypass techniques
  5. 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

  1. Test introspection
  2. Test query depth
  3. Test query complexity
  4. Test batch queries
  5. 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

  1. Test error messages
  2. Check information disclosure
  3. Test stack traces
  4. Verify logging
  5. Document findings

Copy-Paste Prompts

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

API Security Checklist

  • Authentication working
  • Authorization enforced
  • Input validated
  • Rate limiting active
  • Errors sanitized
  • Logging enabled
  • CORS configured
  • HTTPS enforced

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.

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