API Documentation: Building Developer-Friendly APIs
December 3, 2024•1 min read
APIDocumentationOpenAPISwagger
# API Documentation: Building Developer-Friendly APIs
Good API documentation is essential for developer adoption. This guide covers creating comprehensive, clear API documentation.
## OpenAPI/Swagger
Define API structure:
```yaml
openapi: 3.0.0
info:
title: User API
version: 1.0.0
paths:
/users:
get:
summary: Get all users
responses:
'200':
description: List of users
content:
application/json:
schema:
type: array
items:
$ref: '#/components/schemas/User'
```
## NestJS Swagger Integration
```typescript
import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
const config = new DocumentBuilder()
.setTitle('API Documentation')
.setVersion('1.0')
.build();
const document = SwaggerModule.createDocument(app, config);
SwaggerModule.setup('api', app, document);
```
## Best Practices
- Include examples
- Document all endpoints
- Explain error responses
- Provide code samples
- Keep documentation updated
## Conclusion
Comprehensive API documentation improves developer experience and adoption. Invest in documentation tools and keep it current.