# Bad Request

**HTTP Status:** 400 Bad Request
**RFC Reference:** [RFC 9110 Section 15.5.1](https://datatracker.ietf.org/doc/html/rfc9110#section-15.5.1)

The request is malformed or contains invalid syntax.

## Response


```json
{
  "type": "https://docs.apiera.io/problems/bad-request",
  "title": "Bad Request",
  "status": 400,
  "detail": "The request could not be understood by the server due to malformed syntax.",
  "instance": "/v1/products",
  "correlationId": "550e8400-e29b-41d4-a716-446655440000"
}
```

## Common Causes

- Invalid JSON syntax
- Missing required headers
- Malformed request parameters
- Invalid data types


## How to Fix

- Validate JSON syntax
- Ensure all required headers are present
- Check parameter formats match API specification
- Verify Content-Type header is correct