> ## 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.

# CustomToolCallOutputItemOutputUnion2 - TypeScript SDK

> CustomToolCallOutputItemOutputUnion2 type definition

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

## Supported Types

### `string`

```typescript lines theme={null}
const value: string = "<value>";
```

### `models.CustomToolCallOutputItemOutputUnion1[]`

```typescript lines theme={null}
const value: models.CustomToolCallOutputItemOutputUnion1[] = [];
```