fabioc-aloha/alex_skill_mall · plugins/ai-agents/mcp-toolkit/skills/mcp-server-hardening/SKILL.md

mcp-server-hardening skillB

mcp-server-hardening is agent-read markdown (skill) from fabioc-aloha/alex_skill_mall: Secure an MCP server that is reachable over a network — host-name validation against DNS rebinding, CORS restraint, authentication, secret handling, and the confused-deputy problem..

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 fabioc-aloha/alex_skill_mall/mcp-server-hardening@git:20260914.0426f9e
Exact content
mdr add fabioc-aloha/alex_skill_mall/mcp-server-hardening@sha256:0ecd8abe14e6bec3

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_bjtl4qtt3vtwuzfh.svg)](https://markdownregistry.com/a/art_bjtl4qtt3vtwuzfh)

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Versions

versioncommittedcommitsizeaudit
git:20260914.0426f9e latest2026-09-14 0426f9e 4,634 BB view

Audit of the latest version

B  16 of 17 checks passed. Deterministic, no model, same answer every run.
  • fail: No prompt-injection phrasing (matched: ignore previous instructions)
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (4634 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 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

fabioc-aloha/alex_skill_mall · 4 stars · license MIT · pushed 2026-09-14 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_bjtl4qtt3vtwuzfh
GET https://markdownregistry.com/api/v1/resolve?ref=fabioc-aloha/alex_skill_mall/mcp-server-hardening
GET https://markdownregistry.com/api/v1/blob/0ecd8abe14e6bec3f6e3e85a7a5ec2572371c41828cf908f2129c8f89b6ed09f