42Crunch
API security platform auditing OpenAPI definitions and enforcing conformance at runtime.
Technical Architecture & Overview
42Crunch takes an API-contract-first approach: its audit engine scores OpenAPI definitions against more than 300 checks, conformance scans verify that live APIs match their declared contracts, and a runtime firewall enforces the schema. The VS Code extension offers audit and scan on a limited free basis, audit scoring also runs in CI/CD, and the platform deploys in the cloud, on-premises, or hybrid. The vendor has extended the contract-based approach to MCP server security.
Targeted Technical Use Cases
Organizations with mature OpenAPI practices that want contract-level API security enforcement.
Evaluation & Trade-offs
Core Strengths
- +Combines contract audit, conformance scanning, and runtime enforcement.
- +Audit and scan run inside the VS Code OpenAPI editor.
- +Runtime firewall allowlists requests based on the contract.
Trade-Offs & Limitations
- -Value depends on OpenAPI spec quality and coverage.
- -Runtime protection adds a firewall component to the request path.
Defensive Security Application
Enforcing API contract security so requests that deviate from the contract never reach application logic.
Frequently Asked Questions
What is 42Crunch?→
42Crunch takes an API-contract-first approach: its audit engine scores OpenAPI definitions against more than 300 checks, conformance scans verify that live APIs match their declared contracts, and a runtime firewall enforces the schema. The VS Code extension offers audit and scan on a limited free basis, audit scoring also runs in CI/CD, and the platform deploys in the cloud, on-premises, or hybrid. The vendor has extended the contract-based approach to MCP server security.
What is 42Crunch used for?→
Organizations with mature OpenAPI practices that want contract-level API security enforcement.
What are the strengths of 42Crunch?→
- +Combines contract audit, conformance scanning, and runtime enforcement.
- +Audit and scan run inside the VS Code OpenAPI editor.
- +Runtime firewall allowlists requests based on the contract.
What are the limitations of 42Crunch?→
- +Value depends on OpenAPI spec quality and coverage.
- +Runtime protection adds a firewall component to the request path.
How is 42Crunch used defensively?→
Enforcing API contract security so requests that deviate from the contract never reach application logic.