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

# BYOK

Whether the engine needs the caller's own key, saved in plugin settings: `required` (OpenRouter holds none), `optional` (OpenRouter's key is used unless the caller saved one), or `none`

## Example Usage

```go theme={null}
import (
	"github.com/OpenRouterTeam/go-sdk/models/components"
)

value := components.BYOKRequired

// Open enum: custom values can be created with a direct type cast
custom := components.BYOK("custom_value")
```

## Values

| Name | Value |
| - | - |
| `BYOKRequired` | required |
| `BYOKOptional` | optional |
| `BYOKNone` | none |