api-documenter

api-documenter is a skill for Claude Code from sickn33/agentic-awesome-skills. It costs 39 tokens per session (1,451 once invoked), scanned A, original, MIT.

A guide to writing and maintaining documentation for web APIs, including OpenAPI 3.1 specifications, examples, authentication details, and developer portals. An API is a defined way for software systems to communicate.

In plain words
What is it for?
Use it to create or review API specifications, write onboarding and migration guides, build interactive documentation, and generate code examples or software libraries.
Why use it?
It helps keep API documentation accurate and easier to use, reducing confusion when developers integrate with an API or generate software libraries from its specification.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the agentic-awesome-skills plugin — 196 skills shipped together

About the project

AAS Core is a local control plane for coding agents that lets them search a large catalogue of skills, choose a stack, validate it, and create a reproducible plan. It is used to assemble and review agent workflows through its CLI, local MCP server, catalogue, plugins, and Workbench. The catalogue add-ons provide the skills, plugins, bundles, and workflows that AAS Core helps agents select and validate.

sickn33/agentic-awesome-skills · 45,983 stars · on GitHub · sickn33.github.io

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.

agentmods
npx agentmods add skills/sickn33/agentic-awesome-skills/api-documenter
Any agent
npx skills add sickn33/agentic-awesome-skills --skill api-documenter
Clone the repo
git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills

Made for: Claude Code.

Or install agentic-awesome-skills, the plugin that ships this one along with the rest of its 196 skills.

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.

agentmods badge for api-documenter

README.md
[![agentmods](https://agentmods.dev/badge/skills/sickn33/agentic-awesome-skills/api-documenter.svg)](https://agentmods.dev/skills/sickn33/agentic-awesome-skills/api-documenter)
Your own site
<a href="https://agentmods.dev/skills/sickn33/agentic-awesome-skills/api-documenter"><img src="https://agentmods.dev/badge/skills/sickn33/agentic-awesome-skills/api-documenter.svg" alt="Measured on agentmods" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,451 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00039 $0.01451
Opus 5 $0.00019 $0.00726
Sonnet 5 $0.00008 $0.00290
Haiku 4.5 $0.00004 $0.00145

Measured today against content hash 8bd372644f41, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

api-documenter 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 today.

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.

- Automated testing of code examples and curl commands
Origin

Copies of this mod

8 near-identical copies found in the catalogue:

plugins/agentic-awesome-skills-claude/skills/api-documenter/SKILL.md · 188 lines

How it starts

The opening of the file, as written. The whole thing — 188 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an expert API documentation specialist mastering modern developer experience through comprehensive, interactive, and AI-enhanced documentation.

Use this skill when

  • Creating or updating OpenAPI/AsyncAPI specifications
  • Building developer portals, SDK docs, or onboarding flows
  • Improving API documentation quality and discoverability
  • Generating code examples or SDKs from API specs

Do not use this skill when

  • You only need a quick internal note or informal summary
  • The task is pure backend implementation without docs
  • There is no API surface or spec to document

Instructions

  1. Identify target users, API scope, and documentation goals.
  2. Create or validate specifications with examples and auth flows.
  3. Build interactive docs and ensure accuracy with tests.
  4. Plan maintenance, versioning, and migration guidance.

Purpose

Expert API documentation specialist focusing on creating world-class developer experiences through comprehensive, interactive, and accessible API documentation. Masters modern documentation tools, OpenAPI 3.1+ standards, and AI-powered documentation workflows while ensuring documentation drives API adoption and reduces developer integration time.

Capabilities

Modern Documentation Standards

  • OpenAPI 3.1+ specification authoring with advanced features
  • API-first design documentation with contract-driven development
  • AsyncAPI specifications for event-driven and real-time APIs
  • GraphQL schema documentation and SDL best practices
  • JSON Schema validation and documentation integration
  • Webhook documentation with payload examples and security considerations
  • API lifecycle documentation from design to deprecation

AI-Powered Documentation Tools

  • AI-assisted content generation with tools like Mintlify and ReadMe AI
  • Automated documentation updates from code comments and annotations
  • Natural language processing for developer-friendly explanations
  • AI-powered code example generation across multiple languages
  • Intelligent content suggestions and consistency checking
  • Automated testing of documentation examples and code snippets
  • Smart content translation and localization workflows

Read the full file on GitHub · 188 lines

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.

  1. today First seen · 188 lines · 39 tokens per session scan A 8bd372644f41

Subscribe to this mod's changes

api-documenter is a skill published in the GitHub repository sickn33/agentic-awesome-skills (45,983 stars, last pushed today), licensed MIT. It adds 39 tokens to every session and 1,451 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 2026-09-05.

Related

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