api-endpoint-builderlisted
Install: claude install-skill LiHongwei-cn/lihongwei-cn
# API Endpoint Builder
Build complete, production-ready REST API endpoints with proper validation, error handling, authentication, and documentation.
## When to Use This Skill
- User asks to "create an API endpoint" or "build a REST API"
- Building new backend features
- Adding endpoints to existing APIs
- User mentions "API", "endpoint", "route", or "REST"
- Creating CRUD operations
## What You'll Build
For each endpoint, you create:
- Route handler with proper HTTP method
- Input validation (request body, params, query)
- Authentication/authorization checks
- Business logic
- Error handling
- Response formatting
- API documentation
- Tests (if requested)
## Endpoint Structure
### 1. Route Definition
```javascript
// Express example
router.post('/api/users', authenticate, validateUser, createUser);
// Fastify example
fastify.post('/api/users', {
preHandler: [authenticate],
schema: userSchema
}, createUser);
```
### 2. Input Validation
Always validate before processing:
```javascript
const validateUser = (req, res, next) => {
const { email, name, password } = req.body;
if (!email || !email.includes('@')) {
return res.status(400).json({ error: 'Valid email required' });
}
if (!name || name.length < 2) {
return res.status(400).json({ error: 'Name must be at least 2 characters' });
}
if (!password || password.length < 8) {
return res.status(400).json({ error: 'Password must be at least 8 characters' });
}
next();
};
```
##