# Precondition required

The KeenAuth APIs return this problem type with HTTP status 428 (Precondition Required).

## Problem type

| Field | Value |
|---|---|
| Type URI | `https://docs.keenauth.com/errors/precondition_required` |
| Code | `precondition_required` |
| HTTP status | 428 Precondition Required |
| Title | Precondition required |

## Meaning

The configuration resource requires `If-Match`, and the request has none.

## Example response

Example response body. `detail` is a human-readable English description that is not meant for end users; `instance` identifies the request.

```json
{
  "type": "https://docs.keenauth.com/errors/precondition_required",
  "title": "Precondition required",
  "status": 428,
  "code": "precondition_required",
  "detail": "...",
  "instance": "urn:idp:request:<request_id>"
}
```

All error codes: [Error reference](/docs/errors).