42Crunch
Developer-first API security platform with audit, scan, and runtime protection guardrails
Founded
2016
Starting Price
$0
Category
Cybersecurity
Last updated August 20, 2026
About 42Crunch
42Crunch is an API security platform that takes a developer-first approach to securing APIs across the full lifecycle. It statically audits OpenAPI/Swagger contracts with 300+ security checks, dynamically scans live APIs for vulnerabilities, and enforces security quality gates in IDEs and CI/CD pipelines. The platform now extends to agentic AI workflows, adding a Secure MCP Server and guardrails that control how AI coding agents and AI agents interact with enterprise APIs, plus contract-based runtime protection via an API micro-firewall.
Pros & Cons
Pros
- Shift-left approach puts security testing directly in the IDE where developers fix issues before code review
- Contract-based audit runs 300+ structured checks on OpenAPI specs, bringing consistency to API security reviews
- Covers the full API lifecycle in one platform: design-time audit, build-time scanning, and runtime protection
- Free IDE extensions and a genuinely low individual entry price ($9/mo) are rare in the API security space
- Early mover on AI agent security with Secure MCP Server and guardrails for coding agents like Copilot and Claude Code
Key Features
API Security Audit (SAST)
Runs 300+ static security checks against OpenAPI/Swagger contracts, scoring structure, security definitions, and input/output data validation from 0-100
API Vulnerability Scan (DAST)
Dynamic scanner that uses the API contract to test live APIs for authentication, authorization, and improper input validation issues
IDE Integration
Free OpenAPI editor extensions for VS Code, JetBrains, and Eclipse let developers audit and fix API contracts without leaving their editor
AI Coding Agent Guardrails
Integrates with coding agents like GitHub Copilot and Claude Code to add security guardrails and audit-to-AI remediation loops in agentic DevSecOps workflows
Security Quality Gates
Enforces customizable security policies in CI/CD pipelines so vulnerable APIs never reach production
API Runtime Protection
Contract-based API micro-firewall that validates every request against the OpenAPI specification and blocks malicious traffic at runtime
Pricing
Starter
$0/14 days
- Full access free trial, no credit card
- Single user
- Coding agents (Claude Code, Copilot)
- API SAST & DAST
- API vulnerability and identity scan
Best For
Shift-left API security in development
Developers audit and fix OpenAPI contracts inside VS Code, JetBrains, or Eclipse before code ever reaches a pipeline, catching authentication and data validation flaws at design time.
CI/CD security quality gates
AppSec teams enforce customizable security policies in build pipelines so APIs that fail audit or scan thresholds are blocked from deploying to production.
Securing AI agent access to APIs
Enterprises expose existing business APIs to AI agents through a policy-driven Secure MCP Server that validates every request, blocks AI-to-API threats, and keeps an auditable execution trail.
Runtime API threat protection
A micro-firewall generated from the API contract validates requests and responses in production, blocking injection attacks and malformed traffic without behavioral learning periods.
