| name | implementing-api-security-testing-with-42crunch |
| description | Implement comprehensive API security testing using the 42Crunch platform to perform static audit and dynamic conformance scanning of OpenAPI specifications. |
| domain | cybersecurity |
| subdomain | api-security |
| tags | ["api-security","42crunch","openapi","api-audit","api-scan","conformance-testing","shift-left","ci-cd-security","owasp-api-top-10"] |
| version | 1.0 |
| author | mahipal |
| license | Apache-2.0 |
| nist_csf | ["PR.PS-01","ID.RA-01","PR.DS-10","DE.CM-01"] |
| mitre_attack | ["T1190","T1059.007","T1552.001"] |
| source | https://github.com/mukul975/Anthropic-Cybersecurity-Skills |
| source_commit | 04450304b12645cb2b974ab96d28c0664758a88d |
| note | Vendored verbatim from an external Apache-2.0 security-skill library, pinned by commit. Exceeds the internal 300-line skill guideline (agent-code-constraints.md) -- kept as-is because this is vendored reference material (forensics/threat-intel procedure), not Yana AI-authored content, and trimming would damage technical accuracy. |
Implementing API Security Testing with 42Crunch
Overview
42Crunch is an API security platform that combines Shift-Left security testing with Shield-Right runtime protection. It provides API Audit for static security analysis of OpenAPI definitions, API Conformance Scan for dynamic vulnerability detection, and API Protect for real-time threat prevention. The platform integrates into CI/CD pipelines and IDEs to identify OWASP API Security Top 10 vulnerabilities before and after deployment.
When to Use
- When deploying or configuring implementing api security testing with 42crunch capabilities in your environment
- When establishing security controls aligned to compliance requirements
- When building or improving security architecture for this domain
- When conducting security assessments that require this implementation
Prerequisites
- 42Crunch platform account (free tier available for evaluation)
- OpenAPI Specification (OAS) v2.0, v3.0, or v3.1 definitions for target APIs
- IDE with 42Crunch extension (VS Code, IntelliJ, or Eclipse)
- CI/CD pipeline (Jenkins, GitHub Actions, Azure DevOps, or GitLab CI)
- Running API instance for dynamic scanning (conformance scan)
- Node.js or Python environment for CLI tooling
Core Concepts
API Audit (Static Analysis)
API Audit performs static security analysis of OpenAPI definitions without requiring a running API. It evaluates the specification against 300+ security checks organized into categories:
Security Score Categories:
- Data Validation: Schema definitions, parameter constraints, response validation
- Authentication: Security scheme definitions, scope requirements
- Transport Security: Server URL schemes, TLS requirements
- Error Handling: Error response definitions, information leakage prevention
Running API Audit via VS Code Extension:
- Install the 42Crunch extension from the VS Code marketplace
- Open an OpenAPI specification file (YAML or JSON)
- Click the security audit icon in the editor toolbar
- Review the security score (0-100) and individual findings
- Address issues using the inline remediation guidance
Example OpenAPI Definition with Security Controls:
openapi: 3.0.3
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