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42Crunch

42Crunch is an API security platform known for OpenAPI audit, conformance scanning and API protection, now positioned as an AI security platform for MCP servers used by AI agents.

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Introduction

42Crunch built its reputation on API security testing: auditing OpenAPI definitions, scanning running APIs for conformance and protecting them at runtime, with IDE extensions widely used by developers. Its homepage now describes it as an AI security platform for MCP, helping enterprises discover every MCP server their AI agents use, secure it and prove compliance.

Features

  1. OpenAPI audit: Score and fix API definitions.
  2. Conformance scan: Test running APIs against their contract.
  3. API protection: Runtime enforcement.
  4. IDE extensions: VS Code and JetBrains integrations.
  5. MCP security: Discover and secure MCP servers, per the vendor.

Pros

Cons

  1. Repositioning: Focus has shifted toward MCP and AI security.
  2. Pricing on request: Check site for current plans.

Install the 42Crunch extension in your IDE, open an OpenAPI file and run the audit; integrate audit and scan into CI with the vendor’s plugins.

Resources:

Pricing

See site.

  1. API-first teams with OpenAPI contracts.
  2. Enterprises securing MCP servers.
  3. Not a fit without API specifications.

Conclusion

42Crunch offers contract-driven API security and is extending it to MCP servers.

Alternatives

Other tools on CheckOps that cover similar ground. Open a page, or compare one with 42Crunch side by side.