> ## 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.

# Metadata - TypeScript SDK

> Metadata type definition

<Warning>
  The TypeScript SDK and docs are currently in beta.
  Report issues on [GitHub](https://github.com/OpenRouterTeam/typescript-sdk/issues).
</Warning>

## Example Usage

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

let value: Metadata = {};
```

## Fields

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