Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/natuleadan/skills/060101-http-securitynpx skills add natuleadan/skills --skill 060101-http-securitygit clone --depth 1 https://github.com/natuleadan/skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/natuleadan/skills/060101-http-security)<a href="https://agentmods.dev/skills/natuleadan/skills/060101-http-security"><img src="https://agentmods.dev/badge/skills/natuleadan/skills/060101-http-security.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00032 | $0.00774 |
| Opus 5 | $0.00016 | $0.00387 |
| Sonnet 5 | $0.00006 | $0.00155 |
| Haiku 4.5 | $0.00003 | $0.00077 |
Grade A, and why
060101-http-security scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -I https://example.com | grep -i "x-\|strict-\|referrer-\|permissions-" How it starts
The opening of the file, as written. The whole thing — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Security Patterns
Architecture Overview
Security is applied at three layers:
1. Edge/Proxy Layer ← Rate limiting, CSP, security headers, IP deny
2. Application Layer ← Auth rate limit, session validation, input sanitization
3. Infrastructure Layer ← Auto-protection, firewall, DDoS mitigation
Layer 1: Edge/Proxy
Rate Limiting
Applied before requests reach application code.
- Algorithm: Fixed window (cheaper) or sliding window (stricter)
- Identifier: Client IP (
x-forwarded-for→x-real-ip) - Tiers: Different limits per route group (auth, api, public)
Request → match route tier → ratelimit.limit(ip) → pass or 429
↓ (timeout → allow on failure)
Application handler
Content Security Policy (CSP)
Dynamic CSP built from environment variables:
| Directive | Purpose | Configurable via |
|---|---|---|
script-src |
Allowed JS sources | CSP_SCRIPT_SRC_DOMAINS |
style-src |
Allowed CSS sources | CSP_STYLE_SRC_DOMAINS |
img-src |
Allowed image sources | CSP_IMG_SRC_DOMAINS |
font-src |
Allowed font sources | CSP_FONT_SRC_DOMAINS |
connect-src |
Allowed API/WS connections | CSP_CONNECT_SRC_DOMAINS |
frame-src |
Allowed iframe sources | CSP_FRAME_SRC_DOMAINS |
Security Headers
| Header | Value |
|---|---|
X-Content-Type-Options |
nosniff |
X-Frame-Options |
SAMEORIGIN |
X-XSS-Protection |
1; mode=block |
Referrer-Policy |
strict-origin-when-cross-origin |
Permissions-Policy |
camera=(self), microphone=(self), geolocation=(self) |
Strict-Transport-Security |
max-age=31536000; includeSubDomains; preload |
Layer 2: Application
- Auth rate limits (e.g., 10 req/60s on login endpoints)
- Session validation on every protected action
- Input sanitization (XSS prevention)
- CSRF tokens on mutations
Layer 3: Infrastructure
- Auto IP deny list from open-source threat feeds
- DDoS protection at cloud provider level
- Database connection limits and query timeouts
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 6d ago First seen · 97 lines · 32 tokens per session scan A 445dc95c753a
060101-http-security is a skill published in the GitHub repository natuleadan/skills (2 stars, last pushed 3mo ago), licensed MIT. It adds 32 tokens to every session and 774 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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