Claude Plugins for API Security and Application Security: What Exists and What's Missing

The anthropics/claude-plugins-community repository does not currently host any plugins whose primary purpose is API security or application security testing; instead, it enforces security through automated validation pipelines and policy invariants applied to all submitted plugins.

Developers searching for Claude plugins specifically dedicated to API security or application security will find that the community repository focuses on functional extensions—finance automation, testing utilities, rapid-design tooling, and educational helpers—rather than security tooling. However, the repository implements robust security guarantees at the infrastructure level that developers can leverage or extend for their own security-focused projects.

How Security Is Implemented in the Claude Plugins Community

Rather than offering security-specific plugins, the claude-plugins-community repository treats security as a first-class property of the plugin ecosystem itself. Every submission undergoes mandatory automated review before acceptance.

Automated Security Scanning Pipeline

Each plugin submitted to the repository is processed through a static-analysis pipeline defined in .github/actions/validate-plugins/action.yml. This pipeline checks for:

• Unsafe code patterns and forbidden dependencies
• Secret leakage and credential exposure
• Network policy violations
• Shell command execution attempts

The validation action runs automatically on every pull request via the workflow defined in .github/workflows/validate-plugins.yml, ensuring no plugin merges without passing security checks.

Policy Invariants (I1–I9)

The security model rests on nine strict invariants documented in .github/actions/validate-plugins/README.md. These invariants enforce boundaries on plugin behavior:

Invariant Category	Restriction
Network	No arbitrary host connections; allowed endpoints must be explicitly declared in plugin.json
Execution	No shell command execution or subprocess spawning
Credentials	No inclusion of credential-type files or hardcoded secrets
Permissions	Minimal required permissions declared in manifest

Violating any invariant results in automatic rejection during CI.

Running the Security Validator Locally

You can execute the same security checks locally before submitting a plugin. This is particularly valuable if you're developing a custom API security plugin and want to ensure compliance.

# Clone the repository

git clone https://github.com/anthropics/claude-plugins-community.git
cd claude-plugins-community

# Run the validation pipeline against your plugin

.github/actions/validate-plugins/lib/common.sh ./my-plugin

The common.sh script contains the concrete implementation of secret detection, forbidden import analysis, and permission verification.

Embedding Security Checks in Your Own CI

Adapt the repository's validation action for external projects or custom security-focused plugins:

# .github/workflows/security-check.yml

name: Security Check
on: [push, pull_request]

jobs:
  validate:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      
      - name: Run Claude plugin security validator
        uses: anthropics/claude-plugins-community/.github/actions/validate-plugins@main
        with:
          plugin-dir: ./my-security-plugin

This approach lets you enforce the same rigorous standards on any Claude plugin, including those you build for internal API security auditing.

Creating a Security-Focused Claude Plugin

While no dedicated API security plugins currently exist in the community repository, the architecture supports their development. A compliant security plugin manifest would follow this structure:

{
  "name": "api-security-auditor",
  "version": "0.1.0",
  "description": "Audits HTTP response headers for security misconfigurations like missing HSTS or CSP headers.",
  "entrypoint": "index.js",
  "permissions": {
    "network": [
      "https://api.example.com"
    ]
  }
}

Key constraints for security plugins:

• Explicit network allowlist: The permissions.network array must enumerate all endpoints; wildcards are prohibited
• No credential storage: API keys must be provided at runtime through Claude's secure configuration, never embedded in code
• Read-only analysis: The invariants permit inspection and reporting, not modification of external systems

Key Source Files for Security Implementation

Understanding these files enables you to extend or replicate the repository's security model:

• .github/actions/validate-plugins/README.md — Documents the complete security scanning process and invariant definitions
• .github/actions/validate-plugins/action.yml — GitHub Action definition that orchestrates validation
• .github/workflows/validate-plugins.yml — CI workflow enforcing validation on all contributions
• .github/actions/validate-plugins/lib/common.sh — Core validation logic including secret detection patterns

Summary

• The claude-plugins-community repository contains no API security or application security plugins as of the latest analysis
• Security is enforced through automated validation pipelines and nine policy invariants rather than dedicated security tools
• Developers can run the validator locally, embed checks in external CI, or contribute new security plugins following the invariant constraints
• The plugin.json manifest and validate-plugins action form a reusable security framework for any Claude plugin project

Frequently Asked Questions

Can I find an existing Claude plugin for OWASP Top 10 testing?

No. The community repository does not currently include plugins for OWASP testing, penetration testing, or vulnerability scanning. You would need to develop a custom plugin that complies with the validation invariants, ensuring it uses read-only analysis and explicitly declared network permissions.

How do I verify that a third-party Claude plugin is secure before installing it?

Run the repository's validation action against the plugin directory. The common.sh script performs static analysis for secrets, forbidden imports, and policy violations. Alternatively, check whether the plugin's source includes a .claude-plugin/plugin.json with restrained permissions and no credential files.

What network access can a Claude plugin have?

Each plugin must declare allowed endpoints in permissions.network within plugin.json. The validator rejects plugins with unrestricted network access or wildcard domains. For API security testing, you would enumerate specific target APIs, not use open-ended connectivity.

Are there plans to add official security-focused plugins to the repository?

The analysis reveals no roadmap or pending submissions for API security plugins. The repository accepts community contributions; developers can propose security tooling following the contribution guidelines and ensuring strict compliance with invariants I1–I9.

{
  "mcpServers": {
    "instagit": {
      "command": "npx",
      "args": ["-y", "instagit@latest"]
    }
  }
}