A reference skill for NGINX, software commonly used to serve websites, route requests, and distribute traffic between servers. It uses NGINX documentation for configuration and troubleshooting guidance.

Use it to configure web serving, reverse proxies, load balancing, HTTPS, redirects, caching, rate limits, WebSockets, TCP or UDP proxying, and NGINX operations.

It avoids applying Apache-style settings or outdated instructions to NGINX systems.

nginx-docs — Skill for Claude Code and Codex by cookieMonsterDev

Install

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.

Any agent

npx skills add cookieMonsterDev/agents-skills --skill nginx-docs

Clone the repo

git clone --depth 1 https://github.com/cookieMonsterDev/agents-skills

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/cookiemonsterdev/agents-skills/nginx-docs/github.svg)](https://agentmods.dev/skills/cookiemonsterdev/agents-skills/nginx-docs)

Your own site

<a href="https://agentmods.dev/skills/cookiemonsterdev/agents-skills/nginx-docs"><img src="https://agentmods.dev/badge/skills/cookiemonsterdev/agents-skills/nginx-docs/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/cookiemonsterdev/agents-skills/nginx-docs"><img src="https://agentmods.dev/badge/skills/cookiemonsterdev/agents-skills/nginx-docs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 121 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,323 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00121	$0.01323
Opus 5.5	$0.00048	$0.00529
Sonnet 5.5	$0.00024	$0.00265
Haiku 4.5	$0.00012	$0.00132

Measured 1mo ago against content hash 7bf464636a8a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

nginx-docs scanned grade A with 0 findings 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 1mo 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

docs-skills/nginx-docs/SKILL.md · 109 lines

How it starts

The opening of the file, as written. The whole thing — 109 lines — stays where its author put it; the contents beside it link to each section on GitHub.

NGINX questions are easy to answer from stale memory or Apache-style configuration assumptions. Use this skill to ground answers in the official NGINX documentation and return the closest authoritative page instead of generic reverse-proxy advice.

When to Use

Use this skill when the request is about:

NGINX architecture, master/worker processes, and request processing
Installing, building, starting, stopping, and reloading NGINX
Configuration file structure: http, server, location, and stream contexts
Serving static content, reverse proxying, and load balancing
Upstreams, health checks, and connection distribution methods
HTTPS, TLS certificates, HTTP/2, HTTP/3, and QUIC
Rewrite rules, redirects, and URL mapping
Rate limiting, access control, and request filtering
FastCGI, uWSGI, SCGI, gRPC, and WebSocket proxying
Stream (TCP/UDP) proxying and SSL preread
Mail proxy modules (IMAP, POP3, SMTP)
njs scripting and dynamic configuration
Module directives, variables, and logging

Do not use this skill for:

Kubernetes Ingress resources or kubectl usage without NGINX-specific context. Use kubernetes-docs instead; for NGINX Ingress Controller migration, check kubernetes.nginx.org as referenced in NGINX docs.
HAProxy, Envoy, or Traefik configuration unless the user asks for comparison with NGINX docs.
Application server code (Node.js, PHP-FPM app logic) unless the question is about NGINX proxying to that backend per NGINX docs.
NGINX Plus commercial-only features unless the user explicitly needs Plus docs linked from nginx.org.

Workflow

1. Classify the request

Decide which bucket the question belongs to before searching:

Getting started and core concepts
Installation, build, and process control
HTTP server configuration and static content
Reverse proxy, upstreams, and load balancing
TLS, HTTPS, HTTP/2, and HTTP/3
Rewrites, redirects, and WebSocket proxying
Stream (TCP/UDP) and mail proxying
Rate limiting, access control, and logging
njs scripting and advanced modules
Directive and variable reference

Read the full file on GitHub · 109 lines

Files

What ships with it

2 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.

Changes

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.

1mo ago First seen · 109 lines · 121 tokens per session scan A 7bf464636a8a

Subscribe to this mod's changes

nginx-docs is a skill published in the GitHub repository cookieMonsterDev/agents-skills (6 stars, last pushed today), licensed MIT. It adds 121 tokens to every session and 1,323 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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nginx-docs