> ## 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.

# MessagesRequestMetadata

## Example Usage

```typescript theme={null}
import { MessagesRequestMetadata } from "@openrouter/sdk/models";

let value: MessagesRequestMetadata = {};
```

## Fields

| Field    | Type     | Required             | Description |
| -------- | -------- | -------------------- | ----------- |
| `userId` | *string* | :heavy\_minus\_sign: | N/A         |