chore: import upstream snapshot with attribution

cli-tool/components/skills/security/api-security-testing/SKILL.md

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+---
+name: api-security-testing
+description: "API security testing workflow for REST and GraphQL APIs covering authentication, authorization, rate limiting, input validation, and security best practices."
+category: granular-workflow-bundle
+risk: safe
+source: personal
+date_added: "2026-02-27"
+---
+
+# 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
+
+## 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-development` - API development