> ## Documentation Index
> Fetch the complete documentation index at: https://docs.crossmint.com/llms.txt
> Use this file to discover all available pages before exploring further.

# ApiKeyError

> Kotlin Sealed Interface

**Sealed Interface**

```kotlin theme={null}
sealed interface ApiKeyError : ConfigurationError
```

## Properties

| Property  | Type                     | Description                                         |
| --------- | ------------------------ | --------------------------------------------------- |
| `cause`   | `Throwable?`             | -                                                   |
| `code`    | `ConfigurationErrorCode` | Stable, machine-readable identifier for this error. |
| `message` | `String`                 | -                                                   |