API Documentation Generator

Generate OpenAPI 3.0 YAML documentation from REST API route handlers.

9|1|Updated Mar 15, 2026

Search Tags:#documentation #openapi #yaml #swagger #code-analysis #api-docs

Ready to run

npx skills add https://github.com/Notysoty/openagentskills --skill api-documentation-generator-notysoty

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: API Documentation Generator
Source: https://github.com/Notysoty/openagentskills/tree/main/skills/api-docs-generator
Command: npx skills add https://github.com/Notysoty/openagentskills --skill api-documentation-generator-notysoty

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Automatically generate OpenAPI 3.0 YAML documentation for REST API endpoints by analyzing route definitions and handler implementations across frameworks, eliminating manual documentation toil.

Core Features & Use Cases

Reads route files to extract paths, HTTP methods, parameters, and response shapes.
Infers request and response schemas when explicit schemas are not present, ensuring OpenAPI-compatible specs.
Outputs a complete YAML document ready to load into Swagger UI, Redoc, or other OpenAPI tooling.

Quick Start

Point the agent at your routes file and run the API Documentation Generator to produce OpenAPI YAML for all endpoints.

Frequently Asked Questions about API Documentation Generator

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I generate OpenAPI documentation from existing code?▼

To generate OpenAPI documentation from existing code, you can use an automated tool that reads route files to extract paths, HTTP methods, parameters, and response shapes. It analyzes your REST API route handlers and outputs a complete OpenAPI 3.0 YAML document.

Can I create Swagger YAML from a FastAPI or Express codebase?▼

Yes, you can create Swagger YAML from FastAPI or Express codebases. The generation process supports multiple frameworks including Express, FastAPI, Go net/http, Rails, and Django by extracting route definitions and handler implementations directly.

How does API documentation generation work when schemas are missing?▼

When explicit schemas are missing, API documentation generation works by inferring request and response schemas from your code logic. It analyzes route handlers to infer data shapes, ensuring the output remains a complete OpenAPI-compatible specification.

How do I convert REST API routes into Redoc-ready YAML?▼

To convert REST API routes into Redoc-ready YAML, point an automated generation agent at your routes file. It extracts endpoint definitions and produces a complete OpenAPI 3.0 YAML document ready to load into Redoc or Swagger UI.

Does this OpenAPI generator work with Go net/http and Rails frameworks?▼

Yes, this OpenAPI generator works with Go net/http and Rails frameworks. It supports extracting paths, methods, parameters, and response schemas across various frameworks including Express, FastAPI, Go net/http, Rails, and Django.