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openapi-hardener

Official

Secure your API contracts with robust schema validation.

Software Engineering#pydantic#openapi#owasp#zod#schema validation#json schema#api security
Authorapisec-inc
Version1.0.0
Installs0

System Documentation

What problem does it solve?

This Skill prevents security vulnerabilities and data leaks by ensuring API schemas (OpenAPI, JSON Schema, Zod, etc.) are strictly defined, preventing mass assignment, data exposure, and injection attacks.

Core Features & Use Cases

  • Schema Hardening: Enforces constraints like additionalProperties: false, required fields, and data type validation.
  • Vulnerability Prevention: Mitigates OWASP API3:2023 (Broken Object Property Level Authorization) and other schema-related risks.
  • Use Case: When defining an API endpoint for user creation, this Skill ensures that only permitted fields are accepted as input and that sensitive fields like passwordHash are never returned in the response.

Quick Start

Use the openapi-hardener skill to review and tighten the provided OpenAPI specification for security.

Dependency Matrix

Required Modules

None required

Components

references

💻 Claude Code Installation

Recommended: Let Claude install automatically. Simply copy and paste the text below to Claude Code.

Please help me install this Skill:
Name: openapi-hardener
Download link: https://github.com/apisec-inc/apisec-skills/archive/main.zip#openapi-hardener

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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