# upgrade_required

> The upgrade_required Problem Details code: Open this endpoint as a WebSocket, version 13.

Source: https://docs.nexafone.so/v1/errors/upgrade_required/

| | |
| --- | --- |
| HTTP status | `426` |
| Area | Realtime |
| Problem `type` | `https://docs.nexafone.so/errors/upgrade_required` |

## What the `detail` says

The `detail` explains the occurrence; it can read, for example:

- Open this endpoint as a WebSocket, version 13.

## Example

```json
{
  "type": "https://docs.nexafone.so/errors/upgrade_required",
  "title": "Upgrade Required",
  "status": 426,
  "code": "upgrade_required",
  "detail": "Open this endpoint as a WebSocket, version 13.",
  "requestId": "01J9Z8Q4TQ3W6M5V2X7Y8Z9A0B"
}
```

Match on `code`, never on `detail`: the wording may change. See [Problem Details](/v1/errors/).