# Transaction expired

The KeenAuth APIs return this problem type with HTTP status 410 (Gone).

## Problem type

| Field | Value |
|---|---|
| Type URI | `https://docs.keenauth.com/errors/transaction_expired` |
| Code | `transaction_expired` |
| HTTP status | 410 Gone |
| Title | Transaction expired |

## Meaning

The sign-in transaction cookie is missing or invalid, or the transaction's 15-minute lifetime has ended; the client starts a new transaction.

## 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/transaction_expired",
  "title": "Transaction expired",
  "status": 410,
  "code": "transaction_expired",
  "detail": "...",
  "instance": "urn:idp:request:<request_id>"
}
```

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