API Security Hardening
secondsky/claude-skills
REST API security hardening with authentication, rate limiting, input validation, security headers.
A skill your agent uses when the user says 'CSP', 'Content-Security-Policy', 'security headers', 'HSTS', 'X-Frame-Options', 'clickjacking', 'unsafe-inline', 'unsafe-eval', or needs to audit…
Install Memstack Security Csp Headers
$ npx skills add cwinvestments/memstack --skill memstack-security-csp-headers -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install cwinvestments/memstack memstack-security-csp-headers --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/cwinvestments/memstack.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/security/csp-headers .claude/skills/memstack-security-csp-headers && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "memstack-security-csp-headers" agent skill from https://github.com/cwinvestments/memstack/tree/master/skills/security/csp-headers into .claude/skills/memstack-security-csp-headers/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "memstack-security-csp-headers", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/cwinvestments/memstack/tree/master/skills/security/csp-headersType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add cwinvestments/memstack --skill memstack-security-csp-headers -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install cwinvestments/memstack memstack-security-csp-headers --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cwinvestments/memstack.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/security/csp-headers .agents/skills/memstack-security-csp-headers && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "memstack-security-csp-headers" agent skill from https://github.com/cwinvestments/memstack/tree/master/skills/security/csp-headers into .agents/skills/memstack-security-csp-headers/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "memstack-security-csp-headers", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add cwinvestments/memstack --skill memstack-security-csp-headers -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install cwinvestments/memstack memstack-security-csp-headers --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cwinvestments/memstack.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/security/csp-headers .cursor/skills/memstack-security-csp-headers && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "memstack-security-csp-headers" agent skill from https://github.com/cwinvestments/memstack/tree/master/skills/security/csp-headers into .cursor/skills/memstack-security-csp-headers/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "memstack-security-csp-headers", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/cwinvestments/memstack.git --path skills/security/csp-headers--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add cwinvestments/memstack --skill memstack-security-csp-headers -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install cwinvestments/memstack memstack-security-csp-headers --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cwinvestments/memstack.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/security/csp-headers .gemini/skills/memstack-security-csp-headers && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "memstack-security-csp-headers" agent skill from https://github.com/cwinvestments/memstack/tree/master/skills/security/csp-headers into .gemini/skills/memstack-security-csp-headers/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "memstack-security-csp-headers", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install cwinvestments/memstack memstack-security-csp-headersInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add cwinvestments/memstack --skill memstack-security-csp-headers -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/cwinvestments/memstack.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/security/csp-headers .github/skills/memstack-security-csp-headers && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "memstack-security-csp-headers" agent skill from https://github.com/cwinvestments/memstack/tree/master/skills/security/csp-headers into .github/skills/memstack-security-csp-headers/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "memstack-security-csp-headers", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add cwinvestments/memstack --skill memstack-security-csp-headers -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install cwinvestments/memstack memstack-security-csp-headers --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cwinvestments/memstack.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/security/csp-headers .opencode/skills/memstack-security-csp-headers && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "memstack-security-csp-headers" agent skill from https://github.com/cwinvestments/memstack/tree/master/skills/security/csp-headers into .opencode/skills/memstack-security-csp-headers/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "memstack-security-csp-headers", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
memstack-security-csp-headers- GitHub stars
- 423
- Token cost
- ~3.9k tokens
- SKILL.md length
- 699 words
- Files
- 1
- Skills in repo
- 87
- Repo updated
- First seen
- Licence
- Proprietary
At a glance
A skill your agent uses when the user says 'CSP', 'Content-Security-Policy', 'security headers', 'HSTS', 'X-Frame-Options', 'clickjacking', 'unsafe-inline', 'unsafe-eval', or needs to audit…
- Works in 9 steps: Gather Inputs → Scan Existing Headers → Audit CSP Directives → …
- The user says CSP
- SKILL.md covers Activation, Protocol, Inputs and Outputs, plus 1 more section
- Calls openssl; reaches googletagmanager.com and res.cloudinary.com
What it does
Memstack Security Csp Headers is an agent skill from cwinvestments/memstack. Use this skill when the user says 'CSP', 'Content-Security-Policy', 'security headers', 'HSTS', 'X-Frame-Options', 'clickjacking', 'unsafe-inline', 'unsafe-eval', or needs to audit, generate, or fix HTTP security headers for a web application. Do NOT use for API route audits or dependency scanning.
Its SKILL.md is about 3.9k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Security, covering Secure coding. It works with NGINX. The repository describes itself as: Structured skill framework for Claude Code. 130 skills, persistent memory, TokenStack compression, localhost dashboard with 3-agent runner, real-time streaming, MCP tools.
When your agent uses it
- The user says CSP
- Content-Security-Policy
- Security headers
- X-Frame-Options
Example prompts
- “Content-Security-Policy”
- “security headers”
- “X-Frame-Options”
- “/memstack-security-csp-headers”
Workflow steps
9 steps, taken from the step headings in SKILL.md.
- Gather Inputs
- Scan Existing Headers
- Audit CSP Directives
- Inventory External Resources
- Generate Recommended CSP
- Generate Companion Security Headers
- Report-Only Mode
- Framework-Specific Implementation
- Output
What it can do on your machine
Read from SKILL.md and the folder at commit 00370ce. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
openssl
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
googletagmanager.comres.cloudinary.comapi.stripe.comjs.stripe.comfonts.gstatic.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Memstack Security Csp Headers loads about 3.9k tokens when it runs. Until then it costs about 82 tokens; SKILL.md has 699 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Proprietary) doesn't allow us to republish the file, so here is its outline and opening line. It has 699 words (~3,932 tokens).
“Audit existing security headers, identify overly permissive directives, and generate a production-ready Content-Security-Policy with companion headers.”
- name
- memstack-security-csp-headers
- version
- 1.0.0
- license
- Proprietary, MemStack™ Pro by CW Affiliate Investments LLC. See LICENSE.txt
Files
Just SKILL.md in skills/security/csp-headers of cwinvestments/memstack.
Open the folder on GitHubat commit 00370ce
Compare with similar skills
Memstack Security Csp Headers next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Memstack Security Csp Headers this skillcwinvestments/memstack | 423 | — | ~3.9k | Automated safety check: Pass | Proprietary | |
| API Security Hardeningsecondsky/claude-skills | 227 | — | ~718 | Automated safety check: Pass | MIT | |
| Phy Security HeadersLeoYeAI/openclaw-master-skills | 2.2k | — | ~6.2k | Automated safety check: Pass | Apache-2.0 | |
| NIC Task Planningnginx/kubernetes-ingress | 5.1k | — | ~1.7k | Automated safety check: Pass | Apache-2.0 | |
| Cb Security HardeningBlkLeg/CircuitBreaker | 201 | — | ~2.1k | Automated safety check: Pass | MIT | |
| Security AuditTheDecipherist/claude-code-mastery | 550 | — | ~1.3k | Automated safety check: Notes | MIT |
Similar skills
Phy Security Headers
LeoYeAI/openclaw-master-skills
HTTP security header auditor that fetches response headers from any URL and grades them against OWASP, Mozilla Observatory, and Google standards.
NIC Task Planning
nginx/kubernetes-ingress
Plans a change to the NGINX Ingress Controller before any code: acceptance criteria, security impact, affected layers, invariants, test surface and an ordered file list.
Cb Security Hardening
BlkLeg/CircuitBreaker
Enforces Circuit Breaker security hardening conventions across backend, frontend, Docker, and nginx.
Security Audit
TheDecipherist/claude-code-mastery
Checks a codebase for hardcoded secrets, vulnerable dependencies, weak input handling, weak authentication and unsafe transport settings before deployment or merge.
Humble Header Report Analyst
rfc-st/humble
Parses reports from the humble HTTP security header analyzer and explains each finding with remediation steps for DevOps teams.
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Works with
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Questions about Memstack Security Csp Headers
What does Memstack Security Csp Headers do?
A skill your agent uses when the user says 'CSP', 'Content-Security-Policy', 'security headers', 'HSTS', 'X-Frame-Options', 'clickjacking', 'unsafe-inline', 'unsafe-eval', or needs to audit…. Memstack Security Csp Headers is an agent skill from cwinvestments/memstack. Use this skill when the user says 'CSP', 'Content-Security-Policy', 'security headers', 'HSTS', 'X-Frame-Options', 'clickjacking', 'unsafe-inline', 'unsafe-eval', or needs to audit, generate, or fix HTTP security headers for a web application.
When should I use Memstack Security Csp Headers?
Memstack Security Csp Headers fits situations like: the user says CSP; content-Security-Policy; security headers; X-Frame-Options.
How do I install Memstack Security Csp Headers in Claude Code?
Run `npx skills add cwinvestments/memstack --skill memstack-security-csp-headers -a claude-code`. Or copy the skill folder (skills/security/csp-headers in cwinvestments/memstack) into .claude/skills/memstack-security-csp-headers in your project. Claude Code loads it when a task matches its description.
How do I install Memstack Security Csp Headers in Codex?
Run `npx skills add cwinvestments/memstack --skill memstack-security-csp-headers -a codex`. Or copy the skill folder (skills/security/csp-headers in cwinvestments/memstack) into .agents/skills/memstack-security-csp-headers in your project. Codex loads it when a task matches its description.
Can I use Memstack Security Csp Headers in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add cwinvestments/memstack --skill memstack-security-csp-headers -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/memstack-security-csp-headers, .gemini/skills/memstack-security-csp-headers, .github/skills/memstack-security-csp-headers and .opencode/skills/memstack-security-csp-headers in your project.
What does Memstack Security Csp Headers need to run?
Going by SKILL.md and its folder, Memstack Security Csp Headers needs the command-line tools its instructions call (openssl).
Does Memstack Security Csp Headers access the network?
SKILL.md names 5 domains. In commands or code: googletagmanager.com, res.cloudinary.com, api.stripe.com, js.stripe.com and fonts.gstatic.com; the agent is likely to contact these when it follows the instructions. This is read from the text; nothing was executed.
Is Memstack Security Csp Headers safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Memstack Security Csp Headers use?
Memstack Security Csp Headers carries a proprietary licence (declared in SKILL.md). It is published on GitHub, but it is not open source: read the licence file before using or sharing it.
How many tokens does Memstack Security Csp Headers use?
About 3.9k tokens (SKILL.md is roughly 16k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Memstack Security Csp Headers?
Skills that share tags, products or a category with Memstack Security Csp Headers: API Security Hardening (secondsky/claude-skills, 227 stars), Phy Security Headers (LeoYeAI/openclaw-master-skills, 2.2k stars), NIC Task Planning (nginx/kubernetes-ingress, 5.1k stars) and Cb Security Hardening (BlkLeg/CircuitBreaker, 201 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Memstack Security Csp Headers?
cwinvestments (a GitHub user) maintains it in cwinvestments/memstack, which has 423 GitHub stars. The repository holds 87 skills in this directory. The repository was last updated on September 26, 2026.
Source: cwinvestments/memstack on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.