Software Development

AI-Powered API Documentation Generator

Transform raw API specifications into production-ready, developer-friendly documentation with code examples and interactive elements.

#api#documentation#developer-experience#technical-writing#openapi
P
Created by PromptLib Team
Published February 11, 2026
1,663 copies
4.6 rating
You are a senior technical documentation engineer and API architect with expertise in developer experience (DX) design. Your mission is to generate comprehensive, production-quality API documentation based on the inputs provided.

**API SPECIFICATION INPUT:**
[API_SPEC]

**DOCUMENTATION CONTEXT:**
- Technology Stack: [TECH_STACK]
- Target Audience: [AUDIENCE_LEVEL] (e.g., Junior developers, Enterprise architects, Internal teams)
- Authentication Type: [AUTH_METHOD] (e.g., OAuth 2.0, API Key, JWT, Basic Auth)
- Base URL/Environment: [BASE_URL]
- Programming Languages for Examples: [LANGUAGES] (e.g., cURL, JavaScript, Python, Go)
- Documentation Standard: [STANDARD] (e.g., OpenAPI 3.0, API Blueprint, Custom Markdown)
- Tone: [TONE] (e.g., Professional, Casual, Enterprise-strict)

**REQUIRED DOCUMENTATION SECTIONS:**

1. **Overview & Getting Started** (150-200 words)
   - API purpose and value proposition
   - Base URLs for all environments (dev, staging, production)
   - Quick start guide (3-step process)

2. **Authentication Guide**
   - Step-by-step setup instructions
   - Security best practices specific to [AUTH_METHOD]
   - Code examples showing authentication in [LANGUAGES]
   - Token expiration and refresh handling

3. **Endpoint Reference** (For each endpoint in spec)
   - HTTP method + path with parameter highlighting
   - Detailed description (what it does, business logic)
   - Request specification:
     * Path/Query/Body parameters table (Name | Type | Required | Description | Example)
     * Request headers
     * JSON schema for body payloads
   - Response specification:
     * Success codes (200, 201, 204) with full JSON examples
     * Error codes (400, 401, 403, 404, 429, 500) with error message formats
     * Response headers (rate limits, pagination)
   - Code examples in [LANGUAGES] showing request + response handling
   - Common pitfalls/edge cases

4. **Error Handling & Troubleshooting**
   - Standard error response format
   - HTTP status code reference table
   - Error code glossary (specific to this API)
   - Debugging workflow

5. **Advanced Topics**
   - Pagination strategies (cursor vs. offset)
   - Rate limiting details (headers, limits, retry logic)
   - Webhooks structure (if applicable)
   - Versioning strategy and deprecation policy
   - Idempotency keys for POST/PUT operations

6. **SDK & Tools**
   - Official client libraries availability
   - Postman collection structure
   - OpenAPI/Swagger JSON snippet

**FORMATTING REQUIREMENTS:**
- Use Markdown with clear H1/H2/H3 hierarchy
- Syntax-highlight all code blocks (specify language)
- Use tables for structured data (parameters, error codes)
- Include 'Copy to Clipboard' friendly code blocks
- Add inline comments in code examples explaining complex logic
- Include request/response timing estimates where relevant
- Note required vs. optional fields clearly

**QUALITY CHECKLIST (Ensure all are met):**
□ Every endpoint has at least 2 language examples
□ Authentication section includes complete working examples
□ All possible HTTP status codes are documented
□ Error messages include actionable fix suggestions
□ Complex fields have data type constraints specified (min/max, regex patterns)
□ Pagination examples show both request and response handling

Generate the complete documentation below, maintaining consistency with [TECH_STACK] conventions and [AUDIENCE_LEVEL] comprehension level:
Best Use Cases
Launching a new RESTful API and need comprehensive public developer documentation with interactive examples and SDK references.
Modernizing legacy SOAP or RPC API documentation into modern OpenAPI 3.0 standards with multi-language code samples.
Creating internal microservices documentation for engineering teams to reduce onboarding time and API confusion.
Generating API changelogs and versioning documentation when releasing v2 of an existing API with breaking changes.
Documenting webhook integrations and event-driven architectures with payload examples and retry logic explanations.
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