secondsky/claude-skills · plugins/api-security-hardening/skills/api-security-hardening/SKILL.md

api-security-hardening skillA

api-security-hardening is agent-read markdown (skill) from secondsky/claude-skills: REST API security hardening with authentication, rate limiting, input validation, security headers. Use for production APIs, security audits, defense-in-depth, or encountering vulnerabilities, injection attacks, CORS issues..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add secondsky/claude-skills/api-security-hardening@git:20260719.059fc9f
Exact content
mdr add secondsky/claude-skills/api-security-hardening@sha256:40f6f063e321ffc4

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_g5vfblwtdyg6ncpn.svg)](https://markdownregistry.com/a/art_g5vfblwtdyg6ncpn)

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Versions

versioncommittedcommitsizeaudit
git:20260719.059fc9f latest2026-07-19 059fc9f 2,871 BA view · diff
git:20260402.75421fa2026-04-02 75421fa 2,520 BA view · diff
git:20251224.ba827ce2025-12-24 ba827ce 2,507 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (2871 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

secondsky/claude-skills · 219 stars · license MIT · pushed 2026-09-17 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_g5vfblwtdyg6ncpn
GET https://markdownregistry.com/api/v1/resolve?ref=secondsky/claude-skills/api-security-hardening
GET https://markdownregistry.com/api/v1/blob/40f6f063e321ffc453b41bc9c7f8b159425b063943b25396e2fd297ba14845a4

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.