Agent skill

API Reference Documentation

Creates professional API documentation using OpenAPI specifications with endpoints, authentication, and interactive examples.

MITAuto-check passedBackend & APIs

Install API Reference Documentation

skills CLI

$ npx skills add secondsky/claude-skills --skill api-reference-documentation -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills api-reference-documentation --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/api-reference-documentation/skills/api-reference-documentation .claude/skills/api-reference-documentation && rm -rf skills-src

Use ~/.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/

Paste into Claude Code

Install the "api-reference-documentation" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/api-reference-documentation/skills/api-reference-documentation into .claude/skills/api-reference-documentation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-reference-documentation", 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

$skill-installer install https://github.com/secondsky/claude-skills/tree/main/plugins/api-reference-documentation/skills/api-reference-documentation

Type 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.

skills CLI

$ npx skills add secondsky/claude-skills --skill api-reference-documentation -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills api-reference-documentation --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/api-reference-documentation/skills/api-reference-documentation .agents/skills/api-reference-documentation && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "api-reference-documentation" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/api-reference-documentation/skills/api-reference-documentation into .agents/skills/api-reference-documentation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-reference-documentation", 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.

skills CLI

$ npx skills add secondsky/claude-skills --skill api-reference-documentation -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills api-reference-documentation --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/api-reference-documentation/skills/api-reference-documentation .cursor/skills/api-reference-documentation && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "api-reference-documentation" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/api-reference-documentation/skills/api-reference-documentation into .cursor/skills/api-reference-documentation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-reference-documentation", 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

$ gemini skills install https://github.com/secondsky/claude-skills.git --path plugins/api-reference-documentation/skills/api-reference-documentation

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add secondsky/claude-skills --skill api-reference-documentation -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills api-reference-documentation --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/api-reference-documentation/skills/api-reference-documentation .gemini/skills/api-reference-documentation && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "api-reference-documentation" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/api-reference-documentation/skills/api-reference-documentation into .gemini/skills/api-reference-documentation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-reference-documentation", 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.

GitHub CLI

$ gh skill install secondsky/claude-skills api-reference-documentation

Installs 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).

skills CLI

$ npx skills add secondsky/claude-skills --skill api-reference-documentation -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/api-reference-documentation/skills/api-reference-documentation .github/skills/api-reference-documentation && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "api-reference-documentation" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/api-reference-documentation/skills/api-reference-documentation into .github/skills/api-reference-documentation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-reference-documentation", 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.

skills CLI

$ npx skills add secondsky/claude-skills --skill api-reference-documentation -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills api-reference-documentation --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/api-reference-documentation/skills/api-reference-documentation .opencode/skills/api-reference-documentation && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "api-reference-documentation" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/api-reference-documentation/skills/api-reference-documentation into .opencode/skills/api-reference-documentation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-reference-documentation", 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: api-reference-documentation
GitHub stars: 227
Used in: 1 other repo
Token cost: ~561 tokens
SKILL.md length: 79 words
Files: 1
Skills in repo: 169
Repo updated: Sep 28, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Creates professional API documentation using OpenAPI specifications with endpoints, authentication, and interactive examples.

Documenting REST APIs
SKILL.md covers OpenAPI 3.0 Specification, Documentation Checklist, Best Practices and Tools
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Creating SDK references

What it does

API Reference Documentation is an agent skill from secondsky/claude-skills. Creates professional API documentation using OpenAPI specifications with endpoints, authentication, and interactive examples. Use when documenting REST APIs, creating SDK references, or building developer portals.

Its SKILL.md is about 560 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 Backend & APIs, covering OpenAPI specifications, Technical documentation and REST APIs. It works with OpenAPI. The repository describes itself as: Production-ready skills for Claude Code CLI - Cloudflare, React, Tailwind v4, and AI integrations. The licence is MIT.

When your agent uses it

Documenting REST APIs
Creating SDK references
Building developer portals

Example prompts

“Use the api-reference-documentation skill to create professional API documentation using OpenAPI specifications with endpoints, authentication, and…”
“/api-reference-documentation”

What it can do on your machine

Read from SKILL.md and the folder at commit 8837836. 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
No scripts in the folder and no shell commands in SKILL.md (its code samples are yaml).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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

API Reference Documentation loads about 561 tokens when it runs. Until then it costs about 60 tokens; SKILL.md has 79 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~60
When it runs · the whole SKILL.md, loaded when a task matches: ~561

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

The full file from secondsky/claude-skills at commit 8837836, republished under its MIT licence (© secondsky). 79 words, ~561 tokens.

Download SKILL.mdSave it as .claude/skills/api-reference-documentation/SKILL.md (or your agent's skills folder).

name: api-reference-documentation
description: Creates professional API documentation using OpenAPI specifications with endpoints, authentication, and interactive examples. Use when documenting REST APIs, creating SDK references, or building developer portals.
license: MIT

API Reference Documentation

Create comprehensive API documentation for developer integration.

OpenAPI 3.0 Specification

yaml

openapi: 3.0.3
info:
  title: E-Commerce API
  version: 1.0.0
  description: API for managing products and orders
  contact:
    email: api@example.com

servers:
  - url: https://api.example.com/v1
    description: Production
  - url: https://staging-api.example.com/v1
    description: Staging

security:
  - bearerAuth: []

paths:
  /products:
    get:
      summary: List products
      tags: [Products]
      parameters:
        - name: limit
          in: query
          schema: { type: integer, default: 20 }
        - name: category
          in: query
          schema: { type: string }
      responses:
        '200':
          description: Product list
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ProductList'

components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT

  schemas:
    Product:
      type: object
      required: [id, name, price]
      properties:
        id: { type: string, format: uuid }
        name: { type: string, maxLength: 200 }
        price: { type: number, minimum: 0 }
        description: { type: string }

Documentation Checklist

All endpoints documented with examples
Authentication methods explained
Error responses specified
Rate limits documented
Pagination explained
Webhooks documented (if applicable)
SDK examples in multiple languages

Best Practices

Use OpenAPI 3.0+ specification
Include request/response examples
Document all parameters and headers
Provide authentication examples
Enable interactive API exploration
Maintain version documentation
Include migration guides for breaking changes

Tools

Swagger Editor / Swagger UI
Redoc
Postman Documentation
Stoplight

Files

Just SKILL.md in plugins/api-reference-documentation/skills/api-reference-documentation of secondsky/claude-skills.

Open the folder on GitHubat commit 8837836

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in secondsky/claude-skills, which our catalogue first saw on October 7, 2026.

majiayu000/claude-skill-registryskills/api/api-reference-documentation

Compare with similar skills

API Reference Documentation 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.

API Reference Documentation compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
API Reference Documentation this skillsecondsky/claude-skills	227	1 repos	~561	Automated safety check: Pass	MIT	9 days ago
OpenAPI Spec Generationwshobson/agents	40k	9 repos	~511	Automated safety check: Pass	MIT	2 days ago
Inngest APIAsymmetric-al/core	382	—	~1.5k	Automated safety check: Pass	AGPL-3.0	today
Document API Endpointgetsentry/skills	1k	—	~1.1k	Automated safety check: Pass	Apache-2.0	4 days ago
API Documenteraiskillstore/marketplace	430	7 repos	~2.1k	Automated safety check: Pass	None	today
REST API Expertcin12211/orca-q	223	—	~3.2k	Automated safety check: Pass	MIT	16 days ago

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Works with

OpenAPI

Questions about API Reference Documentation

What does API Reference Documentation do?

Creates professional API documentation using OpenAPI specifications with endpoints, authentication, and interactive examples. API Reference Documentation is an agent skill from secondsky/claude-skills. Creates professional API documentation using OpenAPI specifications with endpoints, authentication, and interactive examples.

When should I use API Reference Documentation?

API Reference Documentation fits situations like: documenting REST APIs; creating SDK references; building developer portals.

How do I install API Reference Documentation in Claude Code?

Run `npx skills add secondsky/claude-skills --skill api-reference-documentation -a claude-code`. Or copy the skill folder (plugins/api-reference-documentation/skills/api-reference-documentation in secondsky/claude-skills) into .claude/skills/api-reference-documentation in your project. Claude Code loads it when a task matches its description.

How do I install API Reference Documentation in Codex?

Run `npx skills add secondsky/claude-skills --skill api-reference-documentation -a codex`. Or copy the skill folder (plugins/api-reference-documentation/skills/api-reference-documentation in secondsky/claude-skills) into .agents/skills/api-reference-documentation in your project. Codex loads it when a task matches its description.

Can I use API Reference Documentation 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 secondsky/claude-skills --skill api-reference-documentation -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/api-reference-documentation, .gemini/skills/api-reference-documentation, .github/skills/api-reference-documentation and .opencode/skills/api-reference-documentation in your project.

What does API Reference Documentation need to run?

SKILL.md names no scripts, command-line tools or credentials: API Reference Documentation is instructions for the agent only.

Does API Reference Documentation access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is API Reference Documentation 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 API Reference Documentation use?

API Reference Documentation is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does API Reference Documentation use?

About 561 tokens (SKILL.md is roughly 2.2k 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 API Reference Documentation?

Skills that share tags, products or a category with API Reference Documentation: OpenAPI Spec Generation (wshobson/agents, 40k stars), Inngest API (Asymmetric-al/core, 382 stars), Document API Endpoint (getsentry/skills, 1k stars) and API Documenter (aiskillstore/marketplace, 430 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains API Reference Documentation?

secondsky (a GitHub user) maintains it in secondsky/claude-skills, which has 227 GitHub stars. The repository holds 169 skills in this directory. The repository was last updated on September 28, 2026.

Source: secondsky/claude-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install API Reference Documentation

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

API Reference Documentation

OpenAPI 3.0 Specification

Documentation Checklist

Best Practices

Tools

Files

Used in 1 other repository

Compare with similar skills

Similar skills

More from secondsky/claude-skills

Related

Questions about API Reference Documentation