API Audit statically tests your OpenAPI contract; API Scan dynamically tests the running implementation — both in your IDE and CI/CD pipeline, both mapped to the OWASP API Security Top 10.
API Audit runs 300+ automated checks against your OpenAPI (Swagger) definition the moment it's written — catching mass assignment, data and exception leakage, weak authentication schemes, injection vulnerabilities, and missing resource controls before a single line of implementation code exists. Every finding is mapped directly to the OWASP API Security Top 10, scored instantly in your IDE.
A contract that reads well on paper isn't the same as an implementation that behaves correctly. API Scan simulates real API traffic — randomly generated requests and parameters — to test the API's behavior under real-world conditions, not just what the contract claims. Vulnerabilities found here get remediated in the same feedback loop, before they reach production.
Real-time scoring as you write the contract — fix issues before they're ever committed, not in a review three weeks later.
Security Quality Gates block a non-conforming API from shipping, the same way a broken test blocks a build.
The practice of finding vulnerabilities in an API's contract and implementation before attackers do — combining static analysis of the OpenAPI definition with dynamic testing of the running API against real traffic patterns.
API Audit is static — it tests the OpenAPI contract itself, before any implementation exists. API Scan is dynamic — it tests the running API with simulated traffic, checking that the implementation actually behaves the way the contract says it should.
No — it's purpose-built for the API layer specifically, which generic SAST/DAST tools weren't designed to understand. Most teams run both: general AppSec tooling for the wider codebase, and 42Crunch for the OpenAPI-contract-specific detail that generic tools miss.
By testing the contract itself — before implementation begins — rather than waiting for a running service to scan. A vulnerability caught in the OpenAPI definition at design time is dramatically cheaper to fix than the same issue caught in production.
Yes. Both Audit and Scan run as Security Quality Gates in your pipeline, failing the build the same way a broken unit test would, so a non-conforming API can't ship silently.
The same way — an AI coding agent's output is just another contract and implementation to test. 42Crunch runs the identical Audit and Scan checks against AI-generated APIs as it does hand-written ones, catching issues the agent introduced before they ship.
Point 42Crunch at your OpenAPI contract or a live endpoint and get a scored report — no agent install, no commitment required.