SkillsLib.ai

API Documentation Architect

Generate complete, consistent API documentation from your codebase

4.3(3 reviews)
100+ downloads
Updated Oct 2026

What You Can Do

Claude systematically audits your API endpoints and generates comprehensive OpenAPI specifications, parameter documentation, error handling guides, and authentication flows. You get developer-ready documentation that ensures clarity, completeness, and consistency across all endpoints. The skill evaluates your existing documentation for gaps and suggests improvements to enhance developer experience.

Features

OpenAPI/Swagger Spec Generation

Automatically generate production-ready OpenAPI 3.0 specifications from your API code, including schemas, endpoints, methods, and request/response structures

Consistency Auditing

Compare endpoints side-by-side to identify inconsistent naming conventions, response formats, error handling patterns, and parameter structures

Completeness Evaluation

Detect missing documentation elements like parameter descriptions, error codes, authentication requirements, rate limits, and example values

Example Request/Response Generation

Create realistic, executable examples for each endpoint with sample payloads, headers, and responses to help developers integrate faster

Parameter Validation Documentation

Document required vs optional parameters, data types, validation rules, allowed values, and constraints for every endpoint

Error Handling Guide

Systematically document all error responses, HTTP status codes, error messages, and recovery steps for each endpoint

Authentication & Security Documentation

Generate documentation for auth flows, required headers, API key formats, OAuth scopes, rate limits, and security best practices

Documentation Gap Report

Produce a structured audit report highlighting which endpoints lack descriptions, examples, or proper error documentation with actionable fixes

Example Output

Generated OpenAPI Spec (YAML excerpt):

code
post:
  summary: Create user account
  operationId: createUser
  parameters:
    - name: email
      in: query
      required: true
      schema:
        type: string
        format: email
  requestBody:
    required: true
    content:
      application/json:
        schema:
          type: object
          properties:
            name: {type: string, minLength: 1}
            email: {type: string, format: email}
  responses:
    '201':
      description: User created successfully
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/User'
    '400':
      description: Invalid email or missing required field

Consistency Audit Report:

  • ✅ All POST endpoints use 201 status codes
  • ⚠️ GET endpoints inconsistent: /users returns 200, /orders returns 200 (OK)
  • ❌ Error responses: Some endpoints return error_code, others use code — standardize to error_code

Parameter Documentation Sample:

code
Parameter: api_key
  Location: Header (X-API-Key)
  Type: String
  Required: Yes
  Format: 32-character hex string
  Example: a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4
  Description: Your unique API authentication key

What's Included

  • OpenAPI Spec Generator: Transforms your API endpoints into standards-compliant OpenAPI 3.0 YAML/JSON specifications ready for tools like Swagger UI
  • Endpoint Consistency Checker: Identifies naming inconsistencies, response format variations, error handling differences, and structural misalignments across your API
  • Completeness Auditor: Scans all documentation and code for missing components: parameter descriptions, examples, error codes, auth requirements, rate limits
  • Example Request/Response Templates: Pre-built markdown templates for documenting realistic API usage scenarios with proper headers, payloads, and response examples
  • Documentation Standards Guide: Best practices for API documentation structure, naming conventions, error messaging, and developer clarity

Who It's For

  • Backend Engineers
  • API Developers
  • Technical Documentation Writers
  • Solutions Architects
  • DevOps & Platform Engineers

Best For

  • REST API documentation
  • Microservice API auditing
  • SDK and library documentation
  • Internal API standardization
  • Developer portal content generation

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