> ## 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.

# UpdateBYOKKeyRequestDeclaredRegion

Your declaration of the data region in which the upstream provider account behind this credential processes requests, used for routing eligibility on OpenRouter's regional hosts. `null` means undeclared and `global` is behaviorally identical: the credential follows the region OpenRouter records for the endpoint. `europe` or `us` lets requests to `eu.openrouter.ai` or `us.openrouter.ai` use this credential for that provider (private endpoints, endpoints pinned to another cloud region, cross-region inference profiles and video models are excluded). Self-declared and not verified by OpenRouter. For OpenAI and Fireworks the region comes from the key material (a `{"api_key": ..., "region": ...}` key), so the value must match the key's region. Among other providers, Azure accepts `europe` or `us` and Anthropic accepts `us` only. Omit to leave the stored value unchanged (rotating an OpenAI or Fireworks `key` re-derives it from the new key); `null` clears the declaration.

## Example Usage

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

value := components.UpdateBYOKKeyRequestDeclaredRegionGlobal

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

## Values

| Name | Value |
| - | - |
| `UpdateBYOKKeyRequestDeclaredRegionGlobal` | global |
| `UpdateBYOKKeyRequestDeclaredRegionEurope` | europe |
| `UpdateBYOKKeyRequestDeclaredRegionUs` | us |